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Startseite / Know-how
CORE ANLEITUNGEN

Praktische Anleitungen, Tutorials & Best Practices

Komplette Wissensdatenbank für IT-Profis. Handbücher, Checklisten, Vergleiche und Leitfäden — von Security bis KI/ML.

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Alle 653 Ai 278 Architecture 17 Cloud 105 Data 61 Development 116 Devops 28 Guide 2 Infrastructure 21 Observability 1 Security 24
cloudadvanced20. 02. 2026

Kubernetes Security Best Practices 2026

Kompletní průvodce zabezpečením Kubernetes clusterů v roce 2026. Od supply chain security přes eBPF runtime ochranu...

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aiintermediate09. 02. 2026

Planning algoritmy pro agenty

A complete guide to planning algorithms for AI agents. Learn how to implement efficient task planning and...

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aiintermediate07. 02. 2026

Speculative Decoding — rychlejší LLM

Speculative Decoding je technika pro zrychlení velkých jazykových modelů využívající menší pomocný model pro...

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aiintermediate06. 02. 2026

Fine-tuning — přizpůsobení AI modelu vašim datům

Learn how to adapt an AI model to your specific data through fine-tuning. A practical guide to techniques and...

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aiintermediate27. 01. 2026

Git Branching strategie

Git Flow, GitHub Flow, Trunk-Based Development.

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aiintermediate20. 01. 2026

Claude vs GPT vs Gemini

Comparison of the major LLMs — Claude (Anthropic), GPT (OpenAI), Gemini (Google).

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aiintermediate18. 01. 2026

Memory pro AI agenty

Discover how memory works in AI agents and LLM models. A practical guide to context storage techniques, long-term...

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aiintermediate15. 01. 2026

Snowflake Schema — Normalized Dimensional Modeling

Snowflake schema normalizes dimension tables into multiple levels. Storage savings at cost of complex queries.

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aiintermediate09. 01. 2026

Soda — deklarativní monitoring kvality dat pomocí YAML

Soda je nástroj pro monitoring kvality dat s YAML konfigurací. Soda Checks Language a alerting.

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aiintermediate06. 01. 2026

rsync a backup strategie

Inkrementální zálohy s rsync, rotace a disaster recovery.

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aiintermediate22. 12. 2025

AI agenti — architektura a design

A comprehensive guide to the architecture of LLM-based AI agents. Learn to design and implement intelligent systems...

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aiintermediate19. 12. 2025

Supply Chain Security

Ochrana software supply chain. Signed commits, verified builds, SLSA.

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securityintermediate17. 12. 2025

Encryption in Transit — šifrování přenosu dat

TLS, mTLS, VPN, WireGuard. Ochrana dat při přenosu.

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aiintermediate05. 12. 2025

Async Job Queues

Celery, BullMQ, background jobs. Jak zpracovávat úlohy asynchronně.

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aiintermediate04. 12. 2025

SSE for AI Streaming — Real-time LLM Responses

How to implement streaming LLM responses using Server-Sent Events. Token-by-token rendering, backpressure, error...

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aiintermediate04. 12. 2025

Burp Suite Basics — Web Security Testing

How to use Burp Suite for web application testing.

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aiintermediate30. 11. 2025

Compliance Frameworks — SOC 2, ISO 27001

Overview of compliance frameworks. What they require and how to prepare.

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aiintermediate28. 11. 2025

Idempotency — bezpečné opakování operací

Implementace idempotentních API. Idempotency keys a databázové techniky.

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aiintermediate28. 11. 2025

Redis Data Structures

Strings, Lists, Sets, Sorted Sets, Hashes, Streams.

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aiintermediate28. 11. 2025

HTTP Security Headers — Complete Overview

All important security HTTP headers in one place.

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aiintermediate27. 11. 2025

Bulkhead Pattern — izolace selhání

Izolace zdrojů pro prevenci kaskádového selhání. Thread pools, connection pools.

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developmentintermediate27. 11. 2025

Nuxt 3 — Full-Stack Development with Vue and Nitro Engine

A complete guide to full-stack development with Nuxt 3. Server routes, API layer, Nitro engine, auto-imports and...

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aiintermediate27. 11. 2025

Caching Strategie

Cache-aside, write-through, CDN, HTTP cache headers, Redis.

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aiintermediate26. 11. 2025

Prompt Injection — ochrana LLM

Prompt Injection je závažná bezpečnostní hrozba pro LLM modely. Naučte se jak funguje útok, jaké má důsledky a jak...

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aiintermediate26. 11. 2025

Jak na technický pohovor

Příprava na technický pohovor — coding, system design, behavioral otázky.

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aiintermediate25. 11. 2025

Elasticsearch Mapping

Field types, analyzers and mapping strategies.

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developmentintermediate24. 11. 2025

GraphQL Server implementace

Jak postavit GraphQL API. Schema, resolvers, N+1 řešení.

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aiintermediate22. 11. 2025

Career path: junior → senior → staff

Kariérní cesta programátora — co se očekává na každé úrovni.

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aiintermediate21. 11. 2025

Elasticsearch Queries

Match, bool, range, aggregations and full-text search.

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developmentintermediate21. 11. 2025

Infrastructure as Code principy

Zakladni principy IaC. Proc, jak a best practices.

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cloudintermediate20. 11. 2025

Azure Key Vault — Správa secrets

Key Vault pro secrets, keys, certificates. RBAC, Managed Identity a rotation.

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aiintermediate20. 11. 2025

cert-manager — automatické TLS certifikáty

Automatické Let's Encrypt certifikáty v Kubernetes s cert-manager.

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developmentintermediate20. 11. 2025

Secrets Management — Vault, SOPS a bezpečné ukládání

HashiCorp Vault, Mozilla SOPS, AWS Secrets Manager.

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aiintermediate19. 11. 2025

Kibana dashboardy

Vizualizace dat z Elasticsearch.

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aiintermediate19. 11. 2025

N+1 Problem — detekce a řešení

Jak identifikovat a vyřešit N+1 query problem. Eager loading, DataLoader.

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aiintermediate19. 11. 2025

Image Signing — Cosign a Sigstore

Jak podepisovat container images. Cosign, keyless signing, verify v CI/CD.

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aiintermediate18. 11. 2025

RLHF — How LLMs Learn to Be Helpful

RLHF (Reinforcement Learning from Human Feedback) is the key technique that teaches large language models to respond...

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developmentintermediate18. 11. 2025

Mutation Testing — Real Quality of Your Tests

Mutation testing reveals weaknesses in tests that code coverage misses. Stryker, PIT and practical deployment for...

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aiintermediate17. 11. 2025

Svelte tutorial — compile-time framework

Svelte základy. Reaktivita bez Virtual DOM, stores, SvelteKit.

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aiintermediate17. 11. 2025

MFA Implementation — Multi-Factor Authentication

How to implement TOTP, WebAuthn/FIDO2, SMS fallback.

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developmentintermediate14. 11. 2025

SvelteKit v produkci — routing, loading a deployment

A practical guide to deploying a SvelteKit application to production. Load functions, form actions, hooks, error...

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aiintermediate13. 11. 2025

CrewAI tutorial

Naučte se vytvářet AI agenty pomocí CrewAI frameworku. Praktický návod pro tvorbu týmů autonomních agentů s velkými...

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aiintermediate13. 11. 2025

API Error Handling

Jak správně zpracovávat a vracet chyby v API. Error format, logging, retry.

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developmentintermediate13. 11. 2025

Deno/Bun přehled — alternativy k Node.js

Deno a Bun vs Node.js. Runtime srovnání, kompatibilita, výkon.

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aiintermediate12. 11. 2025

Vector databáze — srovnání

A complete comparison of the most popular vector databases for AI applications and RAG systems. Comparing...

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dataintermediate12. 11. 2025

MongoDB Aggregation Pipeline

Jak efektivně dotazovat MongoDB. $match, $group, $lookup, $unwind.

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aiintermediate11. 11. 2025

Co je neuronová síť — principy a první model v Pythonu

Learn the fundamentals of neural networks and build your first model in Python. A practical beginner's guide with...

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aiintermediate10. 11. 2025

Cloud Migration — 7R strategie

Rehost, Replatform, Refactor, Repurchase, Retire, Retain, Relocate. Assessment a plánování.

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cloudintermediate10. 11. 2025

Network Segmentation — segmentace sítě

Jak rozdělit síť do bezpečnostních zón. VLANy, subnety, mikrosegmentace.

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aiintermediate08. 11. 2025

API Design Checklist

REST API design checklist — naming, versioning, error handling, pagination.

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aiintermediate08. 11. 2025

Vim a Neovim

Režimy, navigace, editace, makra a Neovim s Lua.

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aiintermediate08. 11. 2025

Next.js tutorial — fullstack React

Server Components, App Router, API routes, SSR/SSG.

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developmentintermediate07. 11. 2025

GitOps — Patterns a Anti-patterns

GitOps architektonické vzory. Monorepo vs polyrepo, environment promotion, secrets management.

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aiintermediate06. 11. 2025

Event-Driven Programming

Event sourcing, CQRS, message brokers. Architektura řízená událostmi.

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aiintermediate05. 11. 2025

OpenTelemetry — Unified Observability

OpenTelemetry jako standard pro traces, metriky a logy. Instrumentace, Collector a integrace s backendy.

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cloudintermediate04. 11. 2025

Hybrid Cloud — On-premise a Cloud

Hybrid architektura, Azure Arc, AWS Outposts, Anthos a networking.

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aiintermediate04. 11. 2025

On-call Engineering — Best Practices

Effective on-call rotations. Alert quality, escalation, compensation, and burnout prevention.

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developmentintermediate04. 11. 2025

Python Typing — typové anotace

Jak používat type hints v Pythonu. Generics, Protocol, TypeVar, mypy.

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aiintermediate03. 11. 2025

Prompt Engineering — best practices

Naučte se nejlepší praktiky prompt engineeringu pro práci s LLM a AI agenty. Tipy a triky pro efektivní komunikaci s...

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devopsintermediate03. 11. 2025

SRE — Four Golden Signals v Praxi

Implementace Four Golden Signals: Latency, Traffic, Errors, Saturation s PromQL dotazy a alertingem.

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aiintermediate03. 11. 2025

Log agregace za 10 minut

Centralizované logování za 10 minut s Loki + Promtail + Grafana.

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aiintermediate31. 10. 2025

Azure Blob Storage — Object Storage

Blob Storage access tiers, lifecycle management, SAS tokeny a immutable storage.

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aiintermediate31. 10. 2025

Data Contracts — Formal Agreements on Data Quality and Structure

Data contracts define agreement between data producers and consumers. Schema, SLA and versioning.

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cloudintermediate30. 10. 2025

Kubernetes Operators

Custom controllers pro automatizaci aplikačního lifecycle v Kubernetes.

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dataintermediate30. 10. 2025

ETL vs ELT — When to Use Which Approach for Data Pipelines

Porovnání ETL a ELT přístupů k datovým pipeline. Kdy zvolit extrakci před transformací a kdy naopak.

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aiintermediate30. 10. 2025

SSH Hardening

Zabezpečení SSH — klíčová autentizace, konfigurace sshd, fail2ban.

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aiintermediate29. 10. 2025

Regularizace — Dropout, L1/L2 a boj s overfittingem

Naučte se efektivně bojovat s overfittingem pomocí regularizačních technik. Dropout, L1 a L2 regularizace jednoduše...

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cloudintermediate29. 10. 2025

Helm Charts od nuly

Kubernetes package manager. Vytvoření, konfigurace a nasazení Helm chartů.

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aiintermediate29. 10. 2025

Forensic Analysis základy

Jak provádět digitální forenzní analýzu. Evidence, memory dump, disk image.

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aiintermediate28. 10. 2025

Docker Security Best Practices

Zabezpečení Docker kontejnerů. Image scanning, rootless containers, read-only filesystem a runtime security.

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infrastructureintermediate28. 10. 2025

Wireshark základy

GUI analýza paketů — display filtry, TCP streamy, statistiky.

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aiintermediate27. 10. 2025

Circuit Breaker Pattern — ochrana před kaskádovým selháním

Implementace Circuit Breaker patternu pro resilientní mikroservisy. Stavy, konfigurace a praktické příklady.

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aiintermediate27. 10. 2025

SRE — Toil Reduction

Identifikace a eliminace toilu. Automatizace opakovaných úkolů, měření a strategie pro redukci.

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aiintermediate27. 10. 2025

The Complete Guide to Python

Python od základů po pokročilé — syntax, OOP, async, virtuální prostředí, best practices.

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aiintermediate24. 10. 2025

Caching strategie — kde a jak cachovat

Cache-aside, write-through, write-behind and cache invalidation. A complete guide.

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aiintermediate23. 10. 2025

The Complete Guide to Redis

Redis — cache, sessions, queues, pub/sub. A complete guide.

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aiintermediate23. 10. 2025

Postmortem: How to Do It Right

How to write effective postmortems — blameless culture, timeline, root cause, action items.

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cloudadvanced22. 10. 2025

CloudFormation vs Terraform

Srovnání AWS CloudFormation a Terraform. Kdy použít co.

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developmentintermediate22. 10. 2025

Java JVM tuning: cheat sheet

JVM tuning — heap sizing, garbage collectors, JFR, diagnostické flagy.

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dataintermediate21. 10. 2025

ChromaDB Tutorial

Open-source vector DB — installation and querying.

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developmentintermediate21. 10. 2025

Python Debugging — techniky a nástroje

pdb, debugpy, logging, profiling. Jak efektivně debugovat Python.

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aiintermediate20. 10. 2025

SAML vs OIDC — When to Use Which Protocol

Detailed comparison of SAML and OpenID Connect. Architecture, use cases, security, mobile support and migration...

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dataintermediate20. 10. 2025

The Complete Guide to PostgreSQL

PostgreSQL kompletně — instalace, SQL, indexy, JSONB, replikace, backup.

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developmentintermediate17. 10. 2025

Svelte 5 Runes — New Reactive System

Svelte 5 introduces Runes — a new explicit reactive system. Learn $state, $derived, $effect and migration from...

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aiintermediate17. 10. 2025

JSON/YAML: 10 nástrojů pro denní práci

10 nástrojů pro JSON a YAML — jq, yq, fx, gron a další.

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developmentintermediate17. 10. 2025

GitHub Actions vs GitLab CI

The two most popular CI/CD platforms for modern development.

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cloudintermediate16. 10. 2025

ArgoCD GitOps

GitOps deployment with ArgoCD. Automatic synchronization of K8s clusters with Git repositories.

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aiintermediate16. 10. 2025

Python Testing — pytest průvodce

Jak testovat Python kód. pytest, fixtures, mocking, coverage.

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aiadvanced16. 10. 2025

Ansible vs Terraform

Configuration Management vs Infrastructure as Code.

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aiintermediate15. 10. 2025

Optimalizery — Adam, SGD a jak vybrat správný

Porovnání optimalizérů Adam vs SGD pro trénování neuronových sítí. Jak vybrat správný optimalizér podle typu úlohy a...

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aiintermediate15. 10. 2025

VPC Networking — Peering, Transit GW, PrivateLink

VPC connectivity: peering, Transit Gateway, PrivateLink, VPN and Direct Connect.

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infrastructureintermediate15. 10. 2025

Systemd — správa služeb

A complete guide to systemd — service management, unit files, dependencies and troubleshooting.

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developmentadvanced14. 10. 2025

React Native New Architecture — Fabric, TurboModules and JSI

React Native New Architecture brings Fabric renderer, TurboModules and JSI. Learn migration, performance benefits...

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aiintermediate14. 10. 2025

Database Indexing Strategie

Jak správně indexovat. B-tree, GIN, partial, covering indexes.

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dataintermediate14. 10. 2025

SQL vs NoSQL

Relational vs non-relational databases — CAP theorem and use cases.

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devopsintermediate12. 10. 2025

GitLab CI Pipeline

CI/CD s GitLab CI. Stages, jobs, cache, artifacts a deployment.

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aiintermediate12. 10. 2025

OWASP Top 10: Software and Data Integrity Failures

Ochrana integrity software supply chain — CI/CD pipeline, auto-update, podpisy.

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aiintermediate10. 10. 2025

Throttling a Rate Limiting

Implementace rate limitingu pro ochranu API. Token bucket, sliding window a HTTP hlavičky.

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aiintermediate10. 10. 2025

2FA/MFA: Why and How to Set Up

Two-factor authentication guide — TOTP, hardware keys, backup codes.

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aiintermediate09. 10. 2025

Star Schema — Dimensional Modeling for Analytical Warehouse

Star schema is foundation of dimensional modeling. Fact and dimension tables for analytical queries.

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aiintermediate09. 10. 2025

Container Orchestration Patterns

Návrhové vzory pro kontejnerovou orchestraci. Sidecar, Ambassador, Adapter, Init Container a další.

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aiintermediate09. 10. 2025

How to Build a Developer Portfolio

How to create a portfolio that helps you get a job — projects, design, content.

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aiintermediate08. 10. 2025

10 Bash Tricks That Will Save You Hours of Work

10 practical bash tricks — history search, brace expansion, process substitution. Save hours daily.

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aiintermediate08. 10. 2025

OWASP Top 10: Identification and Authentication Failures

Bezpečná autentizace — session management, MFA, ochrana proti credential stuffing.

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aiintermediate07. 10. 2025

BuildKit — Modern Docker Build Engine

BuildKit as next-gen build engine. Parallel builds, cache mount, secret mount and multi-platform builds.

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devopsintermediate05. 10. 2025

Jenkins Pipeline

Jenkins Declarative Pipeline. Stages, agents, post actions.

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aiintermediate03. 10. 2025

Attention Mechanism — The Key to Modern AI

Discover the attention mechanism — the revolutionary technology that changed artificial intelligence. Understand how...

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aiintermediate02. 10. 2025

AutoGen tutorial

Learn to build intelligent agents with the AutoGen framework. A complete tutorial for working with LLM agents, their...

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developmentadvanced02. 10. 2025

Zero Trust Identity — Identity-Centric Security Model

Zero Trust Identity approach to security. Continuous verification, device trust, conditional access policies and...

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dataintermediate01. 10. 2025

How to Scale an Application from 0 to 1M Users

Progressive web application scaling — from a single server to a million users.

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architectureintermediate30. 09. 2025

Microservices Checklist

Checklist for microservices architecture — boundaries, communication, observability.

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aiintermediate30. 09. 2025

Disk Management — LVM a ZFS

Správa disků — partitioning, LVM, ZFS a monitoring.

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aiintermediate29. 09. 2025

Docker Security Checklist

Docker security checklist — image scanning, non-root, read-only filesystem.

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aiintermediate29. 09. 2025

Flutter Platform Channels — Native Integration for iOS and Android

How to communicate with native code from Flutter via Platform Channels. Method channels, event channels, Pigeon code...

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aiintermediate28. 09. 2025

Progressive Delivery

Postupne nasazovani. Canary, feature flags, automated rollback.

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aiintermediate28. 09. 2025

Password Hashing — bcrypt, Argon2

How to properly hash passwords. Comparison of bcrypt, Argon2id, scrypt.

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cloudintermediate26. 09. 2025

Multi-Cloud Strategy — When and How

Multi-cloud architecture, vendor lock-in, abstraction layers, and real trade-offs.

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aiintermediate26. 09. 2025

10 Most Common Junior Developer Mistakes

10 mistakes every junior developer makes — and how to avoid them.

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infrastructureintermediate26. 09. 2025

DDoS Protection — How to Defend

Types of DDoS attacks, mitigation, CDN, rate limiting, Cloudflare.

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dataintermediate25. 09. 2025

Lakehouse architektura — spojení data lake a warehouse

Lakehouse kombinuje flexibilitu data lake se spolehlivostí warehouse. Medalionová architektura.

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dataintermediate24. 09. 2025

Parquet, Avro, ORC — Serialization Formats for Data Engineering

Comparison of data formats Parquet, Avro, ORC and JSON. When to use which in data pipeline.

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developmentintermediate23. 09. 2025

React Native Performance — Optimization for 60 FPS

How to achieve 60 FPS in React Native applications. FlashList, memo optimizations, Reanimated, bridge overhead, and...

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securityintermediate23. 09. 2025

Nmap tutorial — network scanning

A complete guide to Nmap. Port scanning, service detection, scripting engine.

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aiintermediate22. 09. 2025

OWASP Top 10: Security Logging and Monitoring Failures

Jak správně logovat bezpečnostní události a detekovat útoky.

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aiintermediate19. 09. 2025

Chain-of-Thought Prompting

Objevte Chain-of-Thought prompting - techniku, která učí AI modely krok za krokem řešit složité problémy. Zvyšte...

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infrastructureintermediate19. 09. 2025

Load Balancing algoritmy

Round Robin, Least Connections, Consistent Hashing a konfigurace v Nginx.

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aiintermediate17. 09. 2025

Database Migrations

Jak spravovat schéma databáze. Alembic, Flyway, Prisma migrations.

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aiintermediate17. 09. 2025

gRPC Service v Go

Jak postavit gRPC službu v Go. Protobuf, streaming, interceptors.

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dataintermediate17. 09. 2025

MongoDB vs PostgreSQL

Document vs relational database — when to choose which.

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cloudintermediate16. 09. 2025

Kubernetes — Stateful Workloady v Praxi

Provoz stateful aplikací na Kubernetes. Databáze, message brokery, storage classes a data persistence.

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cloudintermediate16. 09. 2025

Traefik tutorial

Auto-discovery služeb, Docker/K8s integrace, Let's Encrypt.

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aiintermediate15. 09. 2025

Error Budget

Koncept error budgetu v SRE. Balance spolehlivost a rychlost.

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developmentintermediate15. 09. 2025

pip vs poetry vs uv — správa Python závislostí

Srovnání Python package managerů. Kdy který použít.

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cloudintermediate14. 09. 2025

Network Policies in Kubernetes

How to isolate pods in Kubernetes. Ingress, egress rules.

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aiintermediate12. 09. 2025

Docker Multi-stage Builds

Optimalizace Docker obrazů pomocí multi-stage builds. Menší image, rychlejší deploy, bezpečnější kontejnery.

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cloudintermediate11. 09. 2025

Azure AKS — Managed Kubernetes

Azure Kubernetes Service. Node pools, Azure CNI, Workload Identity a monitoring.

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aiintermediate11. 09. 2025

Jak si postavit home lab

A guide to building a home lab — hardware, OS, services, networking.

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aiintermediate10. 09. 2025

Chunking strategie pro RAG

Discover effective chunking strategies for RAG systems. Learn to optimally split text for better retrieval and...

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cloudintermediate10. 09. 2025

Flux CD Tutorial

GitOps s Flux. Automatická synchronizace, image automation a Helm releases.

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aiintermediate10. 09. 2025

WebSocket vs SSE vs Long Polling

Technologie pro real-time komunikaci — srovnání.

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dataintermediate07. 09. 2025

The Complete Guide to Elasticsearch

Elasticsearch — full-text search, agregace, logging, monitoring.

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cloudintermediate05. 09. 2025

CI/CD pro Kubernetes — Pipeline design

Build, test, scan, push, deploy. GitHub Actions + ArgoCD.

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aiintermediate05. 09. 2025

Password Manager: A Complete Guide

Why and how to use a password manager — Bitwarden, 1Password, KeePass.

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aiintermediate05. 09. 2025

DNS — jak funguje překlad doménových jmen

Kompletní vysvětlení DNS — hierarchie, typy záznamů, resolving a DNSSEC.

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aiintermediate04. 09. 2025

Chaos Engineering — Advanced Techniques

Advanced chaos engineering experiments. Litmus, Chaos Mesh, steady state hypothesis and blast radius.

Weiterlesen →
aiintermediate04. 09. 2025

VPN přehled — WireGuard, OpenVPN, Tailscale

WireGuard pro výkon, OpenVPN pro kompatibilitu, Tailscale pro jednoduchost.

Weiterlesen →
observabilityintermediate04. 09. 2025

Jak nasadit OpenTelemetry v Kubernetes

Step-by-step průvodce nasazením OpenTelemetry Collector v Kubernetes clusteru s exportem do Grafana stacku.

Weiterlesen →
aiintermediate03. 09. 2025

SOLID principy prakticky

5 principů OOP designu s praktickými příklady v Pythonu.

Weiterlesen →
aiintermediate02. 09. 2025

New project setup checklist

Checklist pro setup newho projektu — repo, CI/CD, monitoring, documentation.

Weiterlesen →
cloudintermediate01. 09. 2025

Cloud Disaster Recovery — Strategie

DR strategie, RTO/RPO, multi-region setup a testování.

Weiterlesen →
cloudintermediate01. 09. 2025

Kubernetes Monitoring Stack

Kompletní monitoring pro Kubernetes. Prometheus, Grafana, alerting.

Weiterlesen →
cloudintermediate30. 08. 2025

Google GKE — Managed Kubernetes

GKE Autopilot vs Standard, Workload Identity, Config Connector a Gateway API.

Weiterlesen →
developmentintermediate29. 08. 2025

The Complete Guide to CI/CD

CI/CD od teorie po praxi — continuous integration, delivery, deployment.

Weiterlesen →
aiintermediate29. 08. 2025

OWASP Top 10: Broken Access Control

A practical guide to the most common web vulnerability — Broken Access Control. Examples, prevention and code.

Weiterlesen →
aiintermediate29. 08. 2025

Playwright — A Complete Guide to E2E Testing

A complete guide to E2E testing with Playwright. Auto-waiting, locators, fixtures, parallel execution, visual...

Weiterlesen →
aiintermediate27. 08. 2025

InfluxDB — Time Series

InfluxDB for metrics, IoT and monitoring.

Weiterlesen →
infrastructureintermediate27. 08. 2025

Certbot a SSL certifikáty

HTTPS zdarma přes Let's Encrypt a Certbot.

Weiterlesen →
aiintermediate26. 08. 2025

Cloud Migration Checklist

Cloud migration checklist — assessment, planning, migration, optimization.

Weiterlesen →
cloudintermediate26. 08. 2025

Docker Tutorial from Scratch

Complete introduction to Docker. Containers, images, volumes, and first deployment.

Weiterlesen →
aiintermediate26. 08. 2025

Audit Logging — co, jak a proč logovat

Bezpečnostní audit logy. Co logovat, formát, retence, compliance.

Weiterlesen →
aiintermediate25. 08. 2025

Data Lake — Architecture for Storing Raw Data

Data lake is central repository for raw data in all formats. Architecture and best practices.

Weiterlesen →
aiintermediate25. 08. 2025

SRE — Game Days

Simulované incidenty pro testování připravenosti týmu. Plánování, scénáře a lessons learned.

Weiterlesen →
developmentintermediate25. 08. 2025

React vs Vue vs Svelte

Three major frontend frameworks — approach, performance, and ecosystem.

Weiterlesen →
cloudintermediate22. 08. 2025

Kubernetes Security — Hardening

Pod Security Standards, network policies, image scanning a RBAC.

Weiterlesen →
dataintermediate22. 08. 2025

Spark Structured Streaming — Unified Batch and Stream Processing

Spark Structured Streaming combines batch and stream in one API. Micro-batch and Delta Lake integration.

Weiterlesen →
aibeginner21. 08. 2025

OpenID Connect (OIDC) — Complete Authentication Guide

Complete guide to the OpenID Connect protocol. Authorization Code Flow, PKCE, ID tokens, claims, discovery endpoint...

Weiterlesen →
securityintermediate21. 08. 2025

Linkerd — Lightweight Service Mesh

Linkerd architektura, zero-config mTLS, traffic split a observabilita.

Weiterlesen →
dataintermediate21. 08. 2025

Batch Processing

Jak efektivně zpracovávat velké objemy dat. Chunks, streaming, parallel.

Weiterlesen →
devopsintermediate20. 08. 2025

Tekton — Cloud-Native CI/CD Pipelines

Tekton as a Kubernetes-native CI/CD framework. Tasks, Pipelines, Triggers and ecosystem integration.

Weiterlesen →
cloudintermediate19. 08. 2025

GCP Cloud Run

Serverless kontejnery na Google Cloud Run. Deploy, autoscaling a konfigurace.

Weiterlesen →
aiintermediate19. 08. 2025

Free vs paid nástroje pro vývojáře

Přehled free a paid nástrojů pro vývojáře — kdy se vyplatí platit.

Weiterlesen →
securityintermediate19. 08. 2025

Network Troubleshooting

Systematický přístup k diagnostice síťových problémů.

Weiterlesen →
aiintermediate18. 08. 2025

The Complete Guide to Git

A complete guide to Git from basics to advanced techniques — branches, merge, rebase, hooks.

Weiterlesen →
aiintermediate17. 08. 2025

strace and ltrace — debugging

Tracing system calls and library calls.

Weiterlesen →
devopsintermediate15. 08. 2025

Loki + Grafana — centralizované logy

Lightweight log agregace s Loki a vizualizace v Grafana.

Weiterlesen →
aiintermediate15. 08. 2025

Medalionová architektura — Bronze, Silver, Gold vrstvy dat

Medalionová architektura organizuje data do tří vrstev kvality. Bronze (raw), Silver (clean), Gold (business).

Weiterlesen →
securityintermediate15. 08. 2025

Let's Encrypt tutorial — automatické HTTPS certifikáty

Nastavení Let's Encrypt s certbot. Automatická obnova, wildcard certifikáty.

Weiterlesen →
aiintermediate14. 08. 2025

Production deployment checklist

Kompletní production deployment checklist — before, během i po deployment.

Weiterlesen →
aiintermediate14. 08. 2025

Linux Filesystem Hierarchy

Průvodce adresářovou strukturou Linuxu — FHS standard.

Weiterlesen →
aiintermediate14. 08. 2025

Firewall pravidla — best practices

Jak správně konfigurovat firewall. iptables, nftables, cloud security groups.

Weiterlesen →
dataintermediate13. 08. 2025

System design interview: příprava

Jak se připravit na system design interview — framework, příklady, zdroje.

Weiterlesen →
cloudintermediate13. 08. 2025

Podman vs Docker

Podman — daemonless, rootless alternativa k Dockeru.

Weiterlesen →
dataintermediate13. 08. 2025

Looker — BI platforma s LookML modelovací vrstvou

Looker od Google s LookML vrstvou. Centrální definice metrik a governance.

Weiterlesen →
aiintermediate12. 08. 2025

Delta Lake — ACID Transactions for Data Lake

Delta Lake adds ACID transactions, schema enforcement and time travel over Parquet files.

Weiterlesen →
dataintermediate12. 08. 2025

OWASP Top 10: Injection

SQL injection, NoSQL injection, OS command injection — jak fungují a jak se bránit.

Weiterlesen →
aiintermediate11. 08. 2025

A/B Testing Backend

Serverová strana A/B testů. Assignment, tracking, statistická signifikance.

Weiterlesen →
infrastructureintermediate11. 08. 2025

Nginx vs Caddy

Nginx — performance and flexibility. Caddy — automatic HTTPS.

Weiterlesen →
aiintermediate10. 08. 2025

Jaeger — Distributed Tracing System

Jaeger for distributed tracing. Architecture, deployment, sampling strategies and latency analysis.

Weiterlesen →
aiintermediate08. 08. 2025

Data Governance — Managing Data Assets in Organization

Complete guide to data governance. Policies, roles, data classification and lineage.

Weiterlesen →
aiintermediate08. 08. 2025

Great Expectations — automatizovaná validace kvality dat

Great Expectations je Python framework pro validaci dat. Expectations, suites a integrace do pipeline.

Weiterlesen →
securityintermediate07. 08. 2025

The Complete Guide to Nginx

Nginx as web server, reverse proxy, load balancer. Complete configuration.

Weiterlesen →
aiintermediate07. 08. 2025

jq — zpracování JSON na příkazové řádce

A complete guide to jq for filtering, transforming and analysing JSON data.

Weiterlesen →
aiintermediate06. 08. 2025

Jak napsat dobrý README

Jak napsat README, které lidi přesvědčí použít váš projekt.

Weiterlesen →
aiintermediate05. 08. 2025

Design Patterns přehled (GoF)

Nejdůležitější návrhové vzory. Factory, Observer, Strategy, Singleton.

Weiterlesen →
dataintermediate04. 08. 2025

Read Replicas — scaling čtení

Škálování database pomocí read replik. Master-slave replikace a routing.

Weiterlesen →
aiintermediate03. 08. 2025

Passkeys in Enterprise — Migration from Passwords and MFA

Strategy for deploying passkeys in enterprise environments. Migration from passwords, coexistence with MFA, device...

Weiterlesen →
developmentintermediate03. 08. 2025

Redis Clustering

Horizontální škálování a failover.

Weiterlesen →
aiintermediate02. 08. 2025

Firewalld vs nftables

Moderní Linux firewall — nftables a firewalld.

Weiterlesen →
aiintermediate31. 07. 2025

SLO, SLI a Error Budgets — Deep Dive

A practical guide to implementing SLOs and SLIs. Metric selection, error budget calculation, alerting and burn rate.

Weiterlesen →
aiintermediate29. 07. 2025

Tailscale tutorial

Mesh VPN bez bolesti — instalace, subnet routing, exit nodes, ACL.

Weiterlesen →
developmentintermediate29. 07. 2025

Spring Boot 3 tutorial

Moderní Java backend. REST API, JPA, Security, native image.

Weiterlesen →
aiintermediate29. 07. 2025

Contract Testing s Pact — spolehlivá integrace mikroslužeb

Contract testing s Pact frameworkem. Consumer-driven contracts, provider verification, Pact Broker a strategie pro...

Weiterlesen →
cloudintermediate27. 07. 2025

Crossplane — Kubernetes-native IaC

Crossplane compositions, claims, XRDs a GitOps workflow.

Weiterlesen →
aiintermediate25. 07. 2025

Incident Management — A Complete Guide

Proces řízení incidentů od detekce po řešení. Severity levels, role, komunikace a eskalace.

Weiterlesen →
aiintermediate25. 07. 2025

htop, btop, glances — monitoring

Interaktivní monitoring — htop, btop a glances.

Weiterlesen →
aiintermediate23. 07. 2025

Apache Superset — enterprise open-source BI platforma

Apache Superset je open-source BI od Airbnb. SQL Lab, 40+ vizualizací a enterprise security.

Weiterlesen →
architectureintermediate23. 07. 2025

Distributed Transactions — přehled

Jak řešit transakce napříč mikroservisami. 2PC, Saga, Outbox pattern a TCC.

Weiterlesen →
aiintermediate22. 07. 2025

ChromaDB vs Pinecone

Open-source embedded vs managed serverless vector DB.

Weiterlesen →
architectureintermediate21. 07. 2025

Ambassador Pattern — proxy pro externí služby

Ambassador jako proxy mezi aplikací a externími službami. Retry, circuit breaking, monitoring.

Weiterlesen →
aiintermediate21. 07. 2025

Disaster Recovery Checklist

Disaster recovery checklist — RTO/RPO, failover, communication, testing.

Weiterlesen →
cloudintermediate21. 07. 2025

StatefulSets for Databases

StatefulSets for stateful applications in Kubernetes. Ordered deployment, stable network identity.

Weiterlesen →
aiintermediate18. 07. 2025

WebSocket at Scale — Horizontal Scaling and Session Management

How to scale WebSocket connections to millions of users. Redis Pub/Sub, sticky sessions, connection pooling and...

Weiterlesen →
aiintermediate18. 07. 2025

Data Partitioning Strategies for Optimal Query Performance

Data partitioning is key for performance. Time-based, hash and range partitioning in data lake and warehouse.

Weiterlesen →
devopsintermediate17. 07. 2025

Data Observability — Monitoring Data Pipeline Health

Data observability monitors freshness, volume, schema and data quality. Monte Carlo, Elementary and custom solutions.

Weiterlesen →
aiintermediate17. 07. 2025

Rust Ownership System

Ownership, borrowing, lifetimes. How Rust guarantees memory safety without GC.

Weiterlesen →
aiintermediate16. 07. 2025

AI Project Checklist

Checklist for AI/ML projects — data, model, deployment, monitoring, ethics.

Weiterlesen →
cloudintermediate15. 07. 2025

Multi-stage Docker Builds

Optimalizace Docker images pomocí multi-stage builds. Menší images, bezpečnější produkce.

Weiterlesen →
aiintermediate15. 07. 2025

On-Call Best Practices

Efektivni on-call. Alerting, runbooks, udrzitelnost.

Weiterlesen →
aiadvanced14. 07. 2025

Hexagonal Architecture — porty a adaptéry

Oddělení byznys logiky od infrastruktury. Porty, adaptéry a testovatelný kód.

Weiterlesen →
developmentintermediate13. 07. 2025

GraphQL vs REST — kdy co použít

Srovnání GraphQL a REST API. Over-fetching, performance, tooling a rozhodovací kritéria.

Weiterlesen →
aiintermediate11. 07. 2025

The Complete Guide to REST API

REST API design a implementace — principy, CRUD, autentizace, versioning, best practices.

Weiterlesen →
aiintermediate10. 07. 2025

Apache Airflow — Data Pipeline Orchestration in Practice

A complete guide to Apache Airflow. DAGs, operators, scheduling and best practices for production deployment.

Weiterlesen →
developmentintermediate08. 07. 2025

CSS :has() Selector — Most Powerful CSS Feature of the Decade

A practical guide to the CSS :has() selector. Learn parent selection, conditional styling and advanced patterns...

Weiterlesen →
developmentintermediate08. 07. 2025

React Server Components — A Complete Guide

A complete guide to React Server Components (RSC). Learn the difference between server and client components,...

Weiterlesen →
aiintermediate07. 07. 2025

Few-shot vs Zero-shot Learning

Pochopte rozdíl mezi few-shot a zero-shot learningem v AI. Praktické příklady použití obou přístupů ve strojovém...

Weiterlesen →
aiintermediate07. 07. 2025

Accessibility Checklist

Web accessibility checklist (WCAG 2.1) — navigation, colors, forms, screen readers.

Weiterlesen →
aiintermediate07. 07. 2025

Chaos Engineering zacatky

Uvod do chaos engineering. Principy, experimenty, nastroje.

Weiterlesen →
dataintermediate05. 07. 2025

ClickHouse — Columnar Database for Lightning-Fast Analytical Queries

ClickHouse is an open-source columnar OLAP database. MergeTree engine and materialized views.

Weiterlesen →
cloudintermediate04. 07. 2025

Kubernetes RBAC

Role-Based Access Control v Kubernetes. Roles, ClusterRoles, bindings a service accounts.

Weiterlesen →
aiintermediate04. 07. 2025

Cypress vs Playwright — detailní srovnání E2E frameworků

Cypress vs Playwright v roce 2025. Architektura, rychlost, debugging, cross-browser podpora a rozhodovací kritéria...

Weiterlesen →
aiintermediate02. 07. 2025

Server-Sent Events (SSE) — One-Way Real-Time Stream

Server-Sent Events as a simpler alternative to WebSockets. Implementation, reconnection, event types and comparison...

Weiterlesen →
aiintermediate02. 07. 2025

Postmortem Template

Efektivni postmortem. Template a blameless kultura.

Weiterlesen →
aiintermediate02. 07. 2025

REST API Design Best Practices

Jak navrhovat REST API. URL konvence, HTTP metody, status kódy, HATEOAS.

Weiterlesen →
aiintermediate01. 07. 2025

Sidecar Pattern — rozšíření without changes kódu

Sidecar kontejner pro cross-cutting concerns. Logging, monitoring, service mesh.

Weiterlesen →
cloudintermediate01. 07. 2025

AWS CloudFront — CDN a Edge Computing

CloudFront distribuce, cache policies, Lambda@Edge, CloudFront Functions a origin failover.

Weiterlesen →
developmentintermediate01. 07. 2025

Pinia — Advanced State Management for Vue 3

Advanced patterns with Pinia — plugins, composition stores, SSR hydration, persistence, and store testing in...

Weiterlesen →
aiintermediate28. 06. 2025

GitOps principy

Git jako single source of truth pro infrastrukturu.

Weiterlesen →
cloudintermediate27. 06. 2025

Kaniko — Docker Build bez Dockeru

Kaniko umožňuje buildovat Docker obrazy v Kubernetes bez Docker daemonu. Bezpečné CI/CD v kontejnerech.

Weiterlesen →
developmentintermediate26. 06. 2025

GitHub Actions od nuly

CI/CD s GitHub Actions. Workflows, jobs, steps a prvni pipeline.

Weiterlesen →
aiintermediate25. 06. 2025

SRE — Runbooks a Operational Documentation

Efektivní runbooky pro incident response. Struktura, automatizace a údržba operační dokumentace.

Weiterlesen →
aiintermediate24. 06. 2025

Multi-tenancy — more zákazníků v jedné aplikaci

Architektonické přístupy k multi-tenancy. Shared DB, schema per tenant, DB per tenant.

Weiterlesen →
aiintermediate24. 06. 2025

Mac terminal: 20 triků pro power users

20 triků pro Mac terminal — pbcopy, caffeinate, mdfind, defaults a další.

Weiterlesen →
aiintermediate23. 06. 2025

Message Queue Patterns

Návrhové vzory pro message queues. Work queues, dead letter queues a příklady s RabbitMQ.

Weiterlesen →
securityadvanced23. 06. 2025

Service Mesh vysvětlení

Sidecar proxy, traffic management, observability a security.

Weiterlesen →
aibeginner23. 06. 2025

Go pro začátečníky

Základy Go. Structs, interfaces, error handling, goroutines.

Weiterlesen →
aiintermediate21. 06. 2025

Linux: 10 příkazů, co zachrání situaci

10 Linux příkazů pro krizové situace — plný disk, zombie procesy, network debugging.

Weiterlesen →
aiintermediate21. 06. 2025

Async/Await v Pythonu

Asynchronní programování v Pythonu. asyncio, aiohttp, praktické příklady.

Weiterlesen →
aiintermediate20. 06. 2025

tmux and screen

Session management, split panes, surviving SSH disconnections.

Weiterlesen →
aiintermediate20. 06. 2025

Rate Limiting algoritmy

Token Bucket, Leaky Bucket, Fixed/Sliding Window.

Weiterlesen →
aiintermediate19. 06. 2025

Function Calling tutorial

Naučte se využívat Function Calling v LLM modelech a agentech. Kompletní tutoriál s praktickými příklady a...

Weiterlesen →
architectureintermediate19. 06. 2025

Materialized Views — předpočítané pohledy

Materialized views pro výkon čtení. PostgreSQL a event-driven aktualizace.

Weiterlesen →
aiintermediate19. 06. 2025

TCP vs UDP deep dive

Spolehlivost vs rychlost — kdy který protokol.

Weiterlesen →
aiintermediate18. 06. 2025

RAG architektura od nuly

A complete guide to RAG architecture — from basic principles to practical implementation. Learn to build intelligent...

Weiterlesen →
cloudintermediate17. 06. 2025

Serverless Framework

Multi-cloud serverless deployment. Lambda, Azure Functions, Cloud Functions jedním nástrojem.

Weiterlesen →
aiintermediate16. 06. 2025

AWS EC2 — Complete Guide

Elastic Compute Cloud on AWS. Instance types, AMI, Auto Scaling, Spot and Reserved instances.

Weiterlesen →
cloudintermediate13. 06. 2025

Kubernetes Multi-tenancy

Izolace tenantů v Kubernetes. Namespace isolation, Network Policies, OPA Gatekeeper a virtual clusters.

Weiterlesen →
cloudintermediate12. 06. 2025

Kubernetes Services a Networking

ClusterIP, NodePort, LoadBalancer a Kubernetes networking model.

Weiterlesen →
aiintermediate11. 06. 2025

Mixture of Experts — Efficient Scaling

Mixture of Experts (MoE) is an advanced neural network architecture that enables efficient scaling of AI models. It...

Weiterlesen →
aiintermediate11. 06. 2025

Kubernetes: 20 kubectl příkazů pro denní práci

20 kubectl příkazů pro každodenní práci s Kubernetes. Od základů po debugging.

Weiterlesen →
aiintermediate11. 06. 2025

Chaos Engineering v praxi — od teorie k implementaci

A practical guide to chaos engineering. Steady state hypothesis, blast radius, game days, Litmus Chaos and...

Weiterlesen →
dataintermediate10. 06. 2025

Docker Compose pro development

Lokální development s docker-compose. Multi-kontejner setup, volumes a networking.

Weiterlesen →
cloudintermediate10. 06. 2025

Kubernetes Deployment strategie

RollingUpdate, Recreate, Blue-Green a Canary v Kubernetes.

Weiterlesen →
developmentintermediate09. 06. 2025

Docker Multi-Stage Builds

Optimalizace image pomocí multi-stage builds — menší a bezpečnější.

Weiterlesen →
infrastructureintermediate07. 06. 2025

Load Balancing — L4 vs L7

Rozdíl mezi L4 a L7, algoritmy a kdy co.

Weiterlesen →
developmentintermediate06. 06. 2025

Express.js tutorial — Node.js web framework

Jak postavit API s Express.js. Routing, middleware, error handling.

Weiterlesen →
cloudintermediate05. 06. 2025

Serverless: kdy má smysl

Serverless výhody a nevýhody — Lambda, Functions, kdy použít a kdy ne.

Weiterlesen →
aiintermediate04. 06. 2025

C# .NET 8 novinky

Nejnovější C# features. Primary constructors, collection expressions, AOT.

Weiterlesen →
aiintermediate03. 06. 2025

MCP — Model Context Protocol

Model Context Protocol (MCP) umožňuje AI agentům bezpečný přístup k externím datům a službám. Zjistěte, jak MCP...

Weiterlesen →
devopsintermediate02. 06. 2025

Cloud Observability — Metrics, Logs, Traces

Three pillars of observability: Prometheus, Loki, Jaeger, and OpenTelemetry.

Weiterlesen →
dataintermediate02. 06. 2025

Trino — distribuovaný SQL engine pro federované dotazy

Trino je distribuovaný SQL engine pro dotazy nad heterogenními zdroji bez přesunu dat.

Weiterlesen →
aiintermediate01. 06. 2025

Embedding modely — srovnání pro produkci

Srovnání embedding modelů pro produkční nasazení - výkonnost, rychlost, cena a kvalita vektorových reprezentací...

Weiterlesen →
aiintermediate28. 05. 2025

OpenTelemetry Collector — Pokročilá Konfigurace

Pokročilé nasazení OTel Collectoru. Tail sampling, processors, connectors a deployment patterns.

Weiterlesen →
aiintermediate27. 05. 2025

Docker Compose pokročilé techniky

Pokročilé Compose — profiles, health checks, secrets, resources.

Weiterlesen →
aiintermediate26. 05. 2025

The Complete Guide to Ollama + Local AI

Ollama — lokální AI modely, instalace, API, modely, integrace.

Weiterlesen →
developmentintermediate25. 05. 2025

Docker Compose: 10 pokročilých technik

Pokročilé Docker Compose — profiles, extends, health checks, networking.

Weiterlesen →
developmentintermediate25. 05. 2025

CDN — jak funguje

Jak CDN funguje, kdy nasadit a jak konfigurovat caching.

Weiterlesen →
cloudintermediate24. 05. 2025

Kustomize — K8s konfigurace bez šablon

Kustomize pro overlay-based Kubernetes konfigurace. Base, overlays a patches.

Weiterlesen →
developmentintermediate24. 05. 2025

Chrome DevTools: 20 skrytých funkcí

20 skrytých funkcí Chrome DevTools — copy as fetch, CSS overview, performance.

Weiterlesen →
aiintermediate23. 05. 2025

API Versioning Strategies — URL, Header or Content Negotiation?

A complete guide to API versioning strategies. URL versioning, header versioning, content negotiation, sunset...

Weiterlesen →
aiintermediate22. 05. 2025

Data Mesh — Decentralized Data Architecture

Data mesh is architectural approach based on domain ownership and data products.

Weiterlesen →
aiintermediate19. 05. 2025

JWT best practices — JSON Web Tokens správně

Bezpečné použití JWT. Podpisy, expirace, refresh tokeny, typické chyby.

Weiterlesen →
devopsintermediate17. 05. 2025

Distributed Tracing — Patterns a Best Practices

Principy distribuovaného trasování. Context propagation, span design, correlation IDs a debugging v praxi.

Weiterlesen →
aiintermediate15. 05. 2025

Embedding modely — jak AI rozumí textu

Discover how AI understands text through embedding models. Learn the basics of vector representations, semantic...

Weiterlesen →
cloudintermediate12. 05. 2025

Mac vs Linux for Developers

Mac vs Linux for developers — hardware, software, terminal, ecosystem.

Weiterlesen →
aiintermediate11. 05. 2025

Vector Database Overview

What are vector DBs, how they work and when to use.

Weiterlesen →
aiintermediate10. 05. 2025

LLM Hallucination Detection

Jak detekovat a předcházet halucinacím u velkých jazykových modelů (LLM). Praktické metody a techniky pro zvýšení...

Weiterlesen →
aiintermediate02. 05. 2025

Passkeys Implementation — Passwordless Authentication with WebAuthn

How to implement passkeys (WebAuthn/FIDO2) in web applications. Registration, authentication, platform vs...

Weiterlesen →
cloudintermediate02. 05. 2025

Kubernetes Debugging

Jak debugovat problémy v Kubernetes. Kubectl příkazy, events, logs a ephemeral containers.

Weiterlesen →
aiintermediate01. 05. 2025

ORM vs Raw SQL

When to use ORM and when raw SQL. Advantages, disadvantages, hybrid approach.

Weiterlesen →
aiintermediate28. 04. 2025

Blue-Green Deployment

Zero-downtime release pomocí dvou identických prostředí.

Weiterlesen →
devopsintermediate22. 04. 2025

How to Become a DevOps Engineer

Roadmap to become a DevOps engineer — Linux, cloud, CI/CD, Kubernetes, IaC.

Weiterlesen →
devopsintermediate16. 04. 2025

The Complete Guide to Monitoring

Monitoring a observability — metriky, logy, traces, alerting, SLO/SLI.

Weiterlesen →
aiintermediate15. 04. 2025

DPO — Direct Preference Optimization

DPO (Direct Preference Optimization) je pokročilá metoda pro trénování AI modelů na základě lidských preferencí....

Weiterlesen →
aiintermediate11. 04. 2025

Data Quality Framework — Systematic Approach to Data Quality

How to build data quality framework. Quality dimensions, metrics, processes and tools.

Weiterlesen →
aiintermediate08. 04. 2025

Canary Releases — postupný rollout

Postupné nasazení nové verze na malou část uživatelů. Monitoring, rollback a automatizace.

Weiterlesen →
aiintermediate06. 04. 2025

VS Code: 30 klávesových zkratek pro vývojáře

30 VS Code zkratek — navigace, multi-cursor, refactoring, debugging.

Weiterlesen →
aiintermediate05. 04. 2025

Jailbreak prevence

Jailbreak prevence u LLM a AI agentů - bezpečnostní opatření proti zneužití, detekce škodlivých promptů a ochrana...

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dataintermediate05. 04. 2025

Hadoop ekosystém — HDFS, YARN a moderní alternativy

The Hadoop ecosystem from HDFS to Hive. History and the transition to modern cloud solutions.

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aiintermediate05. 04. 2025

Sed a Awk — praktický tutorial

A practical guide to sed and awk — text editing, data extraction and log transformation.

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dataintermediate22. 03. 2025

PostgreSQL Replication

Streaming and logical replication, failover.

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devopsintermediate20. 03. 2025

Raspberry Pi projekty pro vývojáře

Nejlepší Raspberry Pi projekty pro vývojáře — Pi-hole, NAS, K3s, monitoring.

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aiintermediate06. 03. 2025

LoRA a QLoRA — efektivní fine-tuning

Objevte LoRA a QLoRA techniky pro efektivní fine-tuning AI modelů. Naučte se, jak upravit velké jazykové modely s...

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developmentintermediate02. 03. 2025

Memory leak hunting v Node.js

Jak najít memory leaky v Node.js — heap snapshots, --inspect, common patterns.

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aiintermediate26. 02. 2025

Semantic Versioning

MAJOR.MINOR.PATCH verzovani software.

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aiintermediate25. 02. 2025

Feature Flags implementace

Postupný rollout nových funkcí. Kill switches, percentage rollout a A/B testing.

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dataintermediate23. 02. 2025

DataHub — Open Data Catalog for Modern Data Stack

DataHub from LinkedIn is open-source data catalog. Metadata, lineage and governance.

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aiintermediate19. 02. 2025

Backpropagation — jak se neuronové sítě učí

Objevte, jak funguje backpropagation - klíčový algoritmus, díky kterému se neuronové sítě dokážou učit z chyb a...

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aiintermediate19. 02. 2025

FIDO2/Passkeys — budoucnost autentizace

Passwordless autentizace s WebAuthn a passkeys. Implementace a UX.

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developmentintermediate15. 02. 2025

tRPC + Next.js — A Practical Integration Guide

How to integrate tRPC with Next.js App Router. Server-side calls, React Query integration, subscriptions and...

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aiintermediate15. 02. 2025

Redis vs Memcached

In-memory store comparison — Redis vs Memcached.

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securityadvanced12. 02. 2025

Istio tutorial

Istio na Kubernetes — traffic management, mTLS, observability.

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aiintermediate11. 02. 2025

Certificate Management — správa certifikátů

Lifecycle certifikátů. Automatická obnova, monitoring, cert-manager.

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dataintermediate03. 02. 2025

Redis Patterns — cache, session, queue

Redis jako cache, session store, pub/sub, rate limiter.

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aiintermediate27. 01. 2025

Container Security — Trivy, Falco

Bezpečné kontejnery. Image scanning, runtime security, best practices.

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aiintermediate25. 01. 2025

Airflow vs Dagster vs Prefect — porovnání orchestračních nástrojů

A detailed comparison of three major orchestration tools. Architecture, strengths and when to choose each.

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cloudintermediate19. 01. 2025

Azure Service Bus — Enterprise Messaging

Service Bus queues, topics, sessions, dead-letter queue a transactions.

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cloudadvanced15. 01. 2025

Istio — Service Mesh průvodce

Istio architektura, traffic management, mTLS a observabilita.

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cloudintermediate14. 01. 2025

Kubernetes Resource Limits a Requests

Správná konfigurace CPU a memory pro pody. Requests, limits, QoS a OOMKill.

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aiintermediate12. 01. 2025

LLM Evaluation — Metrics and Methods

A complete guide to evaluating large language models. Metrics, methods and tools for assessing LLM performance in practice.

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cloudadvanced11. 01. 2025

Terraform Testing — Validace infrastruktury

Native terraform test, Terratest, OPA policy-as-code a plan validation.

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developmentintermediate11. 01. 2025

TypeScript vs JavaScript

TypeScript adds types to JavaScript — when it pays off.

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developmentintermediate09. 01. 2025

API Key Management — správa API klíčů

Jak bezpečně generovat, ukládat, rotovat a revokovat API klíče.

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developmentintermediate05. 01. 2025

Vue 3 Reactivity System Deep Dive — Proxy, Effect and Computed

Detailed analysis of Vue 3 reactivity system built on ES6 Proxy. Understand how ref, reactive, computed and...

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aiintermediate23. 12. 2024

LangChain tutorial

Learn to work with the LangChain framework for building AI agents and applications with large language models. A...

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developmentintermediate16. 12. 2024

FastAPI vs Django

Modern async API vs batteries-included framework.

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dataintermediate12. 12. 2024

PostgreSQL JSON Operations

JSONB type, operators, indexes and practical examples.

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aiintermediate11. 12. 2024

Data Vault 2.0 — Scalable Model for Enterprise Warehouse

Data Vault 2.0 — hubs, links, satellites and auditability principles for enterprise warehouse.

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cloudintermediate10. 12. 2024

Flux CD — Pokročilý GitOps

Flux CD v2: multi-tenancy, Helm releases, image automation a notifikace.

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securityadvanced08. 12. 2024

Zero Trust Microsegmentation — Identity as the New Perimeter

Microsegmentation in zero trust architecture. Service mesh identity, mTLS, SPIFFE/SPIRE and policy-based access...

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aiintermediate08. 12. 2024

ClickHouse Analytics

Columnar analytical database — billions of rows per second.

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cloudintermediate05. 12. 2024

Kubernetes Security Hardening

Bezpečný K8s cluster. RBAC, network policies, pod security, secrets.

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cloudintermediate04. 12. 2024

AWS CloudWatch — Monitoring a Observabilita

CloudWatch metriky, logy, alarmy, Logs Insights a Synthetics.

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cloudintermediate04. 12. 2024

Kubernetes vs Docker Swarm

K8s vs Swarm — complexity, features, ecosystem, and when to use which.

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cloudintermediate27. 11. 2024

Kubernetes Network Policies

Síťový firewall v Kubernetes. Ingress a egress pravidla, namespace izolace.

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cloudadvanced21. 11. 2024

Service Mesh Comparison — Istio vs Linkerd vs Consul

Performance, features, complexity and when to choose which mesh.

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developmentintermediate14. 11. 2024

Python Best Practices

Moderní Python — type hints, project structure, linting, formatting.

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dataintermediate13. 11. 2024

PostgreSQL Indexes Deep Dive

B-tree, GIN, GiST, BRIN, partial and expression indexes.

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devopsintermediate12. 11. 2024

Flutter — Production Application Architecture

A complete guide to Flutter application architecture for production. BLoC pattern, dependency injection, routing,...

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aiintermediate10. 11. 2024

Multi-Agent orchestrace

Objevte sílu multi-agent orchestrace s LLM a AI agenty. Naučte se koordinovat více inteligentních agentů pro složité...

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aiadvanced10. 11. 2024

Penetrační testování — praktický návod

Jak provádět pentest. Metodologie, nástroje, reporting.

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aiintermediate09. 11. 2024

Grafana Loki — Log Aggregation

Grafana Loki pro centralizovaný sběr logů. Architektura, LogQL dotazy, label design a integrace.

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devopsintermediate09. 11. 2024

Observability Strategy — Metriky, Logy, Traces

Observability strategy for modern systems. Three pillars, correlation, tools and implementation plan.

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dataintermediate06. 11. 2024

PostgreSQL vs MySQL

The two most popular open-source SQL databases.

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aiadvanced05. 11. 2024

Incident Response

Postup pri produkcnim incidentu. Severity, role, komunikace.

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aiadvanced03. 11. 2024

Incident Response Checklist

Incident response checklist — detection, communication, mitigation, postmortem.

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aiintermediate28. 10. 2024

Go Concurrency — goroutines a channels

Goroutines, channels, select, sync. Concurrent programming v Go.

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aiintermediate24. 10. 2024

Apache Hudi — inkrementální zpracování v data lake

Apache Hudi je table format optimalizovaný pro upserty a CDC. Copy-on-write a merge-on-read.

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aiintermediate14. 10. 2024

Code Review Checklist

Code review checklist — what to focus on when reviewing pull requests.

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cloudintermediate14. 10. 2024

Pinecone Tutorial

Managed vector DB — setup and RAG integration.

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aiintermediate11. 10. 2024

Regex: Cheat Sheet with Practical Examples

Regex cheat sheet — basic characters, quantifiers, lookahead, practical examples.

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architectureadvanced08. 10. 2024

CQRS — oddělení čtení a zápisu

Command Query Responsibility Segregation pro lepší škálovatelnost. Implementace s praktickými příklady.

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aiintermediate05. 10. 2024

Brute Force prevence

Jak chránit login, API a formuláře proti brute force útokům.

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architectureadvanced27. 09. 2024

Saga Pattern — distribuované transakce without 2PC

Implementace Saga patternu pro konzistenci dat napříč mikroservisami. Choreografie vs orchestrace.

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aiintermediate27. 09. 2024

The Complete Guide to SQL

SQL od základů po pokročilé — SELECT, JOIN, subqueries, window functions, CTEs.

Weiterlesen →
aiintermediate25. 09. 2024

Rate Limiting implementace

Jak implementovat rate limiting. Token bucket, sliding window, distribuovaný rate limiting.

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developmentintermediate23. 09. 2024

gRPC Tutorial — Fast Internal Communication

gRPC for communication between microservices. Protocol Buffers, streaming and examples in Node.js.

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developmentintermediate23. 09. 2024

Conventional Commits

Standardizovane commit zpravy. Automaticky changelog a verzovani.

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aiintermediate23. 09. 2024

Platform Engineering — Internal Developer Platform

Budování interní developer platformy. Self-service, golden paths, developer experience a Backstage.

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aiintermediate21. 09. 2024

Batch Normalization — stabilní trénink sítí

Batch Normalization je klíčová technika pro stabilizaci tréninku hlubokých neuronových sítí. Zrychluje konvergenci a...

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aiintermediate15. 09. 2024

Transformer Architecture — A Complete Guide

A complete guide to the Transformer architecture — the revolutionary AI technology behind GPT, BERT and other...

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cloudintermediate13. 09. 2024

Azure Front Door — Globální Load Balancer

Front Door routing, WAF politiky, caching a Private Link origins.

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aiintermediate10. 09. 2024

Performance testing checklist

Performance testing checklist — load testing, stress testing, baseline, metriky.

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dataintermediate08. 09. 2024

Apache Flink — real-time stream processing engine

Apache Flink je framework pro stateful stream processing. Windowing, event time a exactly-once sémantika.

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aiintermediate03. 09. 2024

SBOM generování — Software Bill of Materials

Co je SBOM, proč ho potřebujete a jak ho generovat.

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aiintermediate01. 09. 2024

Horizontal Pod Autoscaler

Automatic pod scaling based on CPU, memory or custom metrics.

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aiintermediate26. 08. 2024

Artifact Management

Sprava build artefaktu. Docker registry, npm, Maven.

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devopsintermediate23. 08. 2024

SRE Golden Signals

Ctyri golden signals: Latency, Traffic, Errors, Saturation.

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cloudadvanced17. 08. 2024

IaC srovnání — Terraform vs Pulumi vs CDK vs Crossplane

Porovnání IaC nástrojů: jazyk, state, ekosystém a kdy který zvolit.

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cloudintermediate12. 08. 2024

Azure Event Grid — Event-Driven architektura

Event Grid topics, subscriptions, filtering, dead-lettering a CloudEvents.

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aiintermediate12. 08. 2024

Pagination Patterns

Offset vs cursor pagination. Keyset pagination, infinite scroll.

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aiintermediate10. 08. 2024

Transfer Learning — Leveraging Pre-trained Models

Transfer Learning enables leveraging pre-trained models for new tasks with less data. Learn how to effectively apply...

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developmentintermediate10. 08. 2024

Python profiling: kompletní návod

Python profiling — cProfile, snakeviz, line_profiler, memory_profiler, py-spy.

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aiintermediate08. 08. 2024

FinOps — Finanční řízení cloudu

FinOps framework, showback/chargeback, budgeting a kulturní změna.

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aiintermediate08. 08. 2024

Distroless Container Images

Minimalistic container images without OS. Maximum security, minimal attack surface.

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cloudintermediate04. 08. 2024

Kubernetes Admission Webhooks

Validating and Mutating admission webhooks. Policy enforcement, auto-injection, and security in K8s clusters.

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securityintermediate03. 08. 2024

SSL/TLS checklist

SSL/TLS checklist — certifikáty, protokoly, HSTS, certificate transparency.

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developmentintermediate01. 08. 2024

React Hooks tutorial

useState, useEffect, useContext, custom hooks. Moderní React.

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cloudintermediate28. 07. 2024

Container Networking v Kubernetes

Kubernetes networking model. CNI pluginy, Service types, Ingress controllery a DNS.

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aiintermediate23. 07. 2024

Riverpod — State Management for Flutter

Riverpod is a modern state management solution for Flutter. Learn providers, code generation, AsyncValue and...

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aiintermediate22. 07. 2024

Loss funkce — přehled a výběr pro váš model

A complete guide to loss functions for machine learning. Learn to choose the right loss function for classification,...

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securityintermediate22. 07. 2024

OAuth 2.0 — A Complete Guide to Flows

Authorization Code, PKCE, Client Credentials. Kdy který použít.

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developmentintermediate12. 07. 2024

API Versioning strategie

Jak verzovat REST API bez rozbití klientů. URL, header a query parameter versioning.

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aiintermediate12. 07. 2024

Bash one-liners pro denní práci

Sbírka praktických Bash one-linerů pro každodenní administraci.

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dataintermediate10. 07. 2024

PostgreSQL Advanced Features

JSONB, CTE, window functions, partitioning, extensions.

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developmentintermediate08. 07. 2024

nginx: 10 konfiguračních hacků

nginx hacky — rate limiting, caching, security headers, gzip, reverse proxy.

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cloudintermediate06. 07. 2024

Serverless Patterns — Architektonické vzory

Fan-out, Step Functions orchestrace, CQRS a event sourcing na serverless.

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aiintermediate06. 07. 2024

PWA Offline Strategies — Cache Patterns and Data Synchronization

Advanced offline strategies for PWA. Cache-first, network-first, stale-while-revalidate, background sync and...

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aiintermediate23. 06. 2024

Go Profiling with pprof: A Practical Guide

Go profiling s pprof — CPU, memory, goroutine profiling, flame graphs.

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developmentintermediate21. 06. 2024

Weaviate Tutorial

Hybrid search — vector + keyword.

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cloudintermediate17. 06. 2024

Dockerfile Best Practices

Optimalizace Dockerfile pro menší images, rychlejší build a bezpečnost.

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devopsintermediate17. 06. 2024

Monitoring stack za 15 minut

Funkční monitoring stack za 15 minut — Prometheus + Grafana v Docker Compose.

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aiintermediate13. 06. 2024

Slowly Changing Dimensions — správa historických změn v dimenzích

Slowly Changing Dimensions (SCD) Type 1, 2 a 3. Implementace v dbt a warehouse.

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aiintermediate10. 06. 2024

GDPR technická implementace

Jak splnit GDPR technicky. Pseudonymizace, šifrování, data retention, práva subjektů.

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developmentintermediate27. 05. 2024

Django REST Framework

Jak postavit API s Django REST Framework. Serializers, viewsets, permissions.

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developmentintermediate26. 05. 2024

How to Learn Programming in 6 Months

A realistic plan for learning programming in 6 months and finding your first job.

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cloudintermediate26. 05. 2024

Kubernetes troubleshooting: kompletní flowchart

Kubernetes troubleshooting flowchart — Pod not starting, CrashLoopBackOff, networking.

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securityadvanced25. 05. 2024

Zero Trust Networking in Cloud

Zero Trust principles, identity-based access, micro-segmentation and BeyondCorp.

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cloudintermediate21. 05. 2024

Kubernetes Cost Optimization

Optimalizace nákladů na Kubernetes. Right-sizing, spot instances, resource quotas a cost visibility nástroje.

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cloudintermediate19. 05. 2024

Cloud Cost Optimisation — A Practical Guide

Right-sizing, reserved capacity, spot instances, tagging a governance.

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developmentintermediate18. 05. 2024

How to Choose Your First Programming Language

A guide to choosing your first programming language — by goal, not by hype.

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developmentintermediate17. 05. 2024

Pod Security Standards — Kubernetes

Privileged, Baseline, Restricted. Jak enforce security standardy na pody.

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devopsintermediate15. 05. 2024

Data Pipeline Testing — Strategies and Tools

How to test data pipelines. Unit tests, integration tests and data quality checks in CI/CD.

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aiintermediate15. 05. 2024

OWASP Top 10: Security Misconfiguration

Nejčastější chyby v konfiguraci serverů, frameworků a cloudových služeb.

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aiintermediate08. 05. 2024

System Prompt Design

A complete guide to system prompt design for LLMs and AI agents. Learn to create effective instructions that improve...

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aiintermediate03. 05. 2024

OpenMetadata — Data Catalog with Collaboration and Active Metadata

OpenMetadata is an open-source catalog focused on collaboration. Active metadata, profiler, and governance.

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aiintermediate02. 05. 2024

AWS Route 53 — DNS a Traffic Management

Route 53 routing policies, health checks, DNS failover a DNSSEC.

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aiintermediate28. 04. 2024

Quantizace modelů — GPTQ, GGUF, AWQ

Průvodce kvantizací AI modelů: GPTQ, GGUF a AWQ metody pro efektivní běh velkých jazykových modelů s menšími nároky...

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aiintermediate27. 04. 2024

API Design First — OpenAPI, Code Generation and Governance

Design-first approach to API development. OpenAPI specifications, automatic code generation, API linting, style...

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dataintermediate27. 04. 2024

Connection Pooling

Jak správně poolovat databázové spojení. PgBouncer, HikariCP, SQLAlchemy.

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aiintermediate26. 04. 2024

SRE — Postmortems Best Practices

Blameless postmortems v praxi. Struktura, facilitace, akční plány a budování kultury učení.

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developmentintermediate26. 04. 2024

Envoy Proxy

Vysokovýkonný L7 proxy — architektura, konfigurace, filtry.

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aibeginner20. 04. 2024

SIEM základy — Security Information and Event Management

Co je SIEM, jak funguje, open-source vs komerční řešení.

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aiintermediate13. 04. 2024

Pub/Sub vs Point-to-Point

Rozdíl mezi pub/sub a point-to-point messaging. When to use který model.

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aiintermediate11. 04. 2024

Load Testing Strategies — From Smoke Tests to Stress Testing

A complete overview of load testing strategies. Smoke, load, stress, spike, soak tests — when to use each type and...

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developmentintermediate07. 04. 2024

Kolik vydělává programátor v ČR (2025)

Reálné platy programátorů v ČR 2025 — junior, medior, senior.

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aiintermediate05. 04. 2024

MongoDB Indexing

Index types, compound, explain and optimization.

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aiintermediate05. 04. 2024

Deployment Strategies — A Complete Guide

Přehled deployment strategií. Rolling update, Recreate, Blue-Green, Canary, A/B testing a Shadow deployment.

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aiintermediate28. 03. 2024

OWASP Top 10: Cryptographic Failures

Jak správně šifrovat data a vyhnout se kryptografickým chybám.

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dataintermediate24. 03. 2024

OLAP vs OLTP — analytické vs transakční databáze

Rozdíl mezi OLAP a OLTP databázemi. Sloupcové vs řádkové uložení a volba pro různé use cases.

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developmentintermediate23. 03. 2024

SQL Injection Prevention — A Complete Guide

Jak zabránit SQL injection v různých jazycích. Prepared statements, ORM, WAF.

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aiintermediate22. 03. 2024

Query Optimization

Jak optimalizovat databázové dotazy. EXPLAIN, rewrite, materialized views.

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aiintermediate18. 03. 2024

Human-in-the-Loop patterns

Objevte Human-in-the-Loop vzory pro LLM a AI agenty. Praktické postupy pro kombinaci lidské inteligence s umělou...

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dataintermediate16. 03. 2024

Dagster — Modern Orchestration with Asset-Based Approach

Dagster brings asset-oriented approach to orchestration. Software-defined assets, type system and monitoring.

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developmentintermediate14. 03. 2024

Docker image: z 5 GB na 50 MB

Jak zmenšit Docker image ze 5 GB na 50 MB. Multi-stage builds, Alpine, distroless.

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aiintermediate14. 03. 2024

Ollama vs vLLM

Local LLM inference — Ollama for simplicity, vLLM for performance.

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aiintermediate09. 03. 2024

Key Rotation — rotace kryptografických klíčů

Proč a jak rotovat šifrovací klíče. Automatizace, grace period, re-encryption.

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aiintermediate08. 03. 2024

Kubernetes Persistent Volumes

Persistentní storage v Kubernetes. PV, PVC, StorageClass a cloud provider integrace.

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aiintermediate05. 03. 2024

Hybrid Search — BM25 + vector

Objevte sílu hybridního vyhledávání kombinujícího BM25 a vektorové embeddings. Naučte se implementovat pokročilé...

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cloudadvanced04. 03. 2024

Service Mesh — Istio a Linkerd

Service mesh pro mikroservisní architektury. Istio vs Linkerd, mTLS, traffic management a observability.

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dataintermediate02. 03. 2024

WebSocket — real-time komunikace

Implementace WebSocket serveru pro chat, notifikace a live dashboardy. Škálování s Redis.

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aibeginner28. 02. 2024

MongoDB Installation and Basics

MongoDB setup, CRUD, schema design and indexes.

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developmentintermediate27. 02. 2024

DAST nástroje — dynamická analýza

OWASP ZAP, Nuclei, Nikto. Testování běžící aplikace.

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aiintermediate25. 02. 2024

Release Management

Rizeni releases. Release trains, feature flags, rollback.

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aiintermediate24. 02. 2024

Retry Pattern — opakování s rozumem

Správná implementation retry logiky. Exponential backoff, jitter a kdy NEretryovat.

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aiintermediate23. 02. 2024

Tokenizace — BPE, WordPiece a zpracování textu

A complete guide to text tokenisation in AI — BPE, WordPiece algorithms and their use in modern language models....

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devopsintermediate17. 02. 2024

GitLab CI — Pokročilé Pipeline

GitLab CI pokročilé techniky: DAG pipelines, child pipelines, includes a review apps.

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aiintermediate06. 02. 2024

CI/CD Pipeline Checklist

CI/CD pipeline checklist — build, test, security, deploy, monitoring.

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aiintermediate01. 02. 2024

Linux Performance Tuning

Optimalizace výkonu — CPU, paměť, I/O, síť, kernel parametry.

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developmentintermediate25. 01. 2024

Self-hosting: What Makes Sense to Host Yourself

What's worth self-hosting and what isn't. A practical service overview.

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aiintermediate23. 01. 2024

Eventual Consistency in Practice

What is eventual consistency and how to work with it in UI and backend.

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aiintermediate23. 01. 2024

SQLite for Prototyping

Embedded SQL database in single file.

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aiintermediate20. 01. 2024

AI nahradí programátory? Realita vs hype

Nahradí AI programátory? Realistický pohled na Copilot, GPT a budoucnost programování.

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dataintermediate12. 01. 2024

AWS RDS — Managed Databases

Relational Database Service. Multi-AZ, Read Replicas, Aurora, backup, and performance tuning.

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aiintermediate03. 01. 2024

DDD Bounded Contexts — hranice domény

Jak definovat bounded contexts v Domain-Driven Design. Context mapping a ubiquitous language.

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cloudintermediate24. 12. 2023

Consul Connect — Service Mesh od HashiCorp

Consul service discovery, Connect proxy, intentions a multi-datacenter.

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aiintermediate21. 12. 2023

SQL Optimalizace

Jak psát rychlé SQL dotazy. EXPLAIN, indexy, query patterns.

Weiterlesen →
developmentintermediate17. 12. 2023

The Complete Guide to GraphQL

GraphQL — schema, queries, mutations, subscriptions, vs REST.

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aiintermediate15. 12. 2023

Batch vs Stream Processing — How to Choose the Right Approach

Comparison of batch and stream processing. Latency, throughput and typical use cases.

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aiintermediate11. 12. 2023

Runtime Security — ochrana běžících aplikací

Falco, Tetragon, runtime threat detection a response.

Weiterlesen →
developmentintermediate10. 12. 2023

Expo — Modern React Native Development Without Xcode or Android Studio

Expo simplifies React Native development. Expo Router, EAS Build, Config Plugins, prebuild workflow and deployment...

Weiterlesen →
devopsintermediate04. 12. 2023

Prometheus vs Datadog

Open-source pull-based monitoring vs managed SaaS platform.

Weiterlesen →
securityintermediate03. 12. 2023

CSRF ochrana — Cross-Site Request Forgery

Jak funguje CSRF útok a jak se bránit. Token, SameSite cookies, Double Submit.

Weiterlesen →
aiintermediate27. 11. 2023

Visual Regression Testing — Automated UI Control

How to implement visual regression testing. Playwright screenshots, Percy, Chromatic, pixel comparison and...

Weiterlesen →
dataintermediate26. 11. 2023

Real-time analytics — architektura pro analýzu v reálném čase

Architektura real-time analytics. Lambda vs Kappa, streaming pipelines a OLAP enginy.

Weiterlesen →
cloudintermediate25. 11. 2023

AWS S3 — Pokročilé funkce

S3 lifecycle policies, replication, event notifications, Object Lock a access policies.

Weiterlesen →
developmentintermediate21. 11. 2023

ArgoCD — Advanced Configuration

ArgoCD ApplicationSets, multi-cluster management, Sync Waves and hook-based deployments.

Weiterlesen →
architectureintermediate17. 11. 2023

Service Discovery — jak se services najdou

Mechanismy service discovery v mikroservisní architektuře. Client-side vs server-side discovery, Consul a Kubernetes DNS.

Weiterlesen →
cloudintermediate15. 11. 2023

Encryption at Rest — šifrování uložených dat

Jak šifrovat data na disku. AES-256, LUKS, cloud KMS, database encryption.

Weiterlesen →
architectureadvanced12. 11. 2023

Event Sourcing — stav jako historie událostí

Store state as a sequence of events. Event store, projections, snapshots and implementation.

Weiterlesen →
aiintermediate11. 11. 2023

Modern Data Stack — Tool Overview for Modern Data Platforms

Modern Data Stack overview. Ingestion, warehouse, transformation, orchestration, quality and visualization.

Weiterlesen →
aiintermediate06. 11. 2023

Reverse ETL — aktivace dat z warehouse do operačních systémů

Reverse ETL synchronizuje data z warehouse zpět do CRM a marketing nástrojů.

Weiterlesen →
cloudintermediate01. 11. 2023

API Gateway Patterns

Routing, aggregation, authentication, rate limiting.

Weiterlesen →
cloudintermediate24. 10. 2023

Google Cloud Pub/Sub — Messaging

Pub/Sub topics, subscriptions, exactly-once delivery a BigQuery export.

Weiterlesen →
developmentintermediate23. 10. 2023

Next.js vs Nuxt vs SvelteKit

Meta-frameworks for SSR, SSG, and full-stack development.

Weiterlesen →
devopsintermediate22. 10. 2023

CI/CD Security — Pipeline Security

Security best practices for CI/CD pipeline. Secret management, supply chain security and SLSA.

Weiterlesen →
developmentintermediate20. 10. 2023

Azure App Service

Deployment webové aplikace na Azure App Service. Konfigurace, scaling a CI/CD.

Weiterlesen →
developmentintermediate18. 10. 2023

The Complete Guide to WebSocket

WebSocket — real-time komunikace, protokol, implementace, scaling.

Weiterlesen →
cloudintermediate03. 10. 2023

Apache Pulsar — cloud-native messaging a streaming

Apache Pulsar odděluje compute od storage. Multi-tenancy, tiered storage a Pulsar Functions.

Weiterlesen →
infrastructureintermediate26. 09. 2023

OWASP Top 10: Server-Side Request Forgery (SSRF)

SSRF útoky — jak útočník zneužije server k přístupu na interní služby.

Weiterlesen →
dataintermediate20. 09. 2023

Debezium — Change Data Capture for Real-time Replication

Debezium is open-source CDC platform. Capturing database changes via Kafka Connect.

Weiterlesen →
aiintermediate12. 09. 2023

ECS Fargate — Production Patterns

Fargate autoscaling, EFS volumes, blue-green deploy a pricing.

Weiterlesen →
aiintermediate11. 09. 2023

Alerting That Makes Sense

How to set up alerting that doesn't cause alert fatigue — symptoms vs causes, severity, runbooks.

Weiterlesen →
cloudintermediate08. 09. 2023

Pulumi Tutorial — IaC v programovacím jazyku

Infrastructure as Code v TypeScript, Python nebo Go. Alternativa k Terraform.

Weiterlesen →
aiintermediate28. 08. 2023

The Complete Guide to Kubernetes

Kubernetes od základů — pods, services, deployments, ingress, monitoring.

Weiterlesen →
aiintermediate22. 08. 2023

Python vs Go for Backend

Python for productivity, Go for performance and simplicity.

Weiterlesen →
aiintermediate18. 08. 2023

Jak psát technickou dokumentaci

Jak psát dokumentaci, kterou budou lidi číst — typy, struktura, nástroje.

Weiterlesen →
dataintermediate07. 08. 2023

Kdy použít NoSQL vs SQL

SQL vs NoSQL — PostgreSQL vs MongoDB vs Redis. Kdy co použít.

Weiterlesen →
cloudintermediate07. 08. 2023

ArgoCD vs FluxCD

GitOps on Kubernetes — ArgoCD with UI vs FluxCD native in K8s.

Weiterlesen →
dataintermediate28. 07. 2023

Azure Cosmos DB — Globální NoSQL

Cosmos DB API modely, konzistenční úrovně, partitioning a RU optimalizace.

Weiterlesen →
cloudadvanced28. 07. 2023

Istio Traffic — Pokročilé vzory

Fault injection, circuit breaking, request mirroring a header-based routing.

Weiterlesen →
devopsintermediate16. 07. 2023

Prometheus — Pokročilé Metriky a PromQL

Pokročilé PromQL dotazy, recording rules, federation a long-term storage s Thanos/Mimir.

Weiterlesen →
infrastructureintermediate11. 07. 2023

How to Secure Your Home Network

A practical guide to securing your home network — router, DNS, VPN, segmentation.

Weiterlesen →
developmentintermediate07. 07. 2023

Node.js Best Practices

Produkční Node.js — error handling, logging, security, performance.

Weiterlesen →
dataintermediate04. 07. 2023

PostgreSQL Partitioning

Declarative partitioning for large tables.

Weiterlesen →
cloudintermediate01. 07. 2023

Secrets in Kubernetes

How to properly manage secrets in K8s. External Secrets, Sealed Secrets, Vault.

Weiterlesen →
cloudintermediate28. 06. 2023

kubectl Cheat Sheet

Nejpoužívanější kubectl příkazy pro každodenní práci s Kubernetes.

Weiterlesen →
aiintermediate10. 06. 2023

Tool Use Patterns

Objevte efektivní vzory používání nástrojů u velkých jazykových modelů a AI agentů. Praktické postupy pro...

Weiterlesen →
dataintermediate10. 06. 2023

Redis Pub/Sub

Real-time messaging with Redis Pub/Sub.

Weiterlesen →
cloudintermediate09. 06. 2023

Google Cloud Functions — Serverless v2

Cloud Functions 2nd gen, Eventarc triggery, concurrency a secrets.

Weiterlesen →
developmentintermediate09. 06. 2023

Prefect — workflow orchestrace bez boilerplate kódu

Prefect nabízí pythonic přístup k orchestraci s minimem konfigurace. Flow, tasky a retry logika.

Weiterlesen →
cloudintermediate06. 06. 2023

Google Firestore — Serverless NoSQL

Firestore datový model, real-time listeners, security rules a offline podpora.

Weiterlesen →
dataintermediate26. 05. 2023

Kolik stojí hosting webové aplikace (2025)

Reálné náklady na hosting webové aplikace — od free tier po enterprise.

Weiterlesen →
aiintermediate23. 05. 2023

Container Security — Build to Runtime

Image hardening, supply chain, runtime protection a scanning.

Weiterlesen →
cloudintermediate18. 05. 2023

AWS CDK — Cloud Development Kit

CDK constructs L1/L2/L3, stacks, aspects a testing.

Weiterlesen →
architectureintermediate14. 05. 2023

Strangler Fig Pattern — migrace z monolitu

Postupná migrace z monolitu na mikroservisy. Bezpečný, inkrementální přístup.

Weiterlesen →
securityintermediate02. 05. 2023

SSL/TLS Configuration — Secure HTTPS

Proper TLS 1.3 configuration, cipher suites, certificates.

Weiterlesen →
cloudadvanced22. 04. 2023

Terraform — Advanced Patterns

Remote state, locking, moved blocks, import and CI/CD pipeline.

Weiterlesen →
aiintermediate19. 04. 2023

SLO/SLI definice

Service Level Indicators a Objectives. Merit spolehlivost.

Weiterlesen →
aiintermediate17. 04. 2023

Progressive Delivery — Canary, Blue-Green a Feature Flags

Strategie progresivního doručování. Canary s metrikami, blue-green s rollback a feature flags.

Weiterlesen →
aiintermediate16. 04. 2023

Flask vs FastAPI — kdy který framework

Srovnání Flask a FastAPI. Výkon, ekosystém, učící křivka.

Weiterlesen →
infrastructureintermediate13. 04. 2023

SSH tunely a port forwarding

A practical guide to SSH tunnels — local, remote, dynamic, jump host.

Weiterlesen →
aiintermediate10. 04. 2023

PWA vs Native Apps — When to Choose Which Technology

Detailed comparison of PWA and native applications. Performance, features, distribution, UX and decision framework...

Weiterlesen →
aiintermediate02. 04. 2023

Cron a Systemd Timers

Srovnání cronu a systemd timerů pro plánování úloh.

Weiterlesen →
developmentintermediate27. 03. 2023

15 Git příkazů, co by měl znát každý vývojář

15 Git příkazů od interactive rebase po bisect. Kompletní přehled pro vývojáře.

Weiterlesen →
aiintermediate23. 03. 2023

SSH: 12 triků, co pravděpodobně neznáte

Pokročilé SSH triky — tunelování, multiplexing, jump hosts, SOCKS proxy.

Weiterlesen →
dataintermediate09. 03. 2023

Apache Kafka — distribuovaná streamovací platforma

Apache Kafka je distribuovaný event streaming systém. Témata, partitioning a consumer groups.

Weiterlesen →
developmentintermediate27. 02. 2023

GitHub Actions — Pokročilé Workflow

Pokročilé techniky GitHub Actions: matrix builds, reusable workflows, composite actions a self-hosted runners.

Weiterlesen →
aiintermediate22. 02. 2023

OWASP Top 10: Insecure Design

Bezpečný návrh aplikace od začátku. Threat modeling, security requirements a secure by design principy.

Weiterlesen →
cloudintermediate12. 02. 2023

AWS IAM — Identity & Access Management

IAM policies, roles, STS, permission boundaries a least privilege best practices.

Weiterlesen →
aiintermediate09. 02. 2023

SAML 2.0 — Enterprise Single Sign-On in Practice

SAML 2.0 for enterprise SSO. Assertion flow, metadata, SP-initiated vs IdP-initiated login, certificates and...

Weiterlesen →
aiintermediate08. 02. 2023

OpenID Connect — autentizace nad OAuth 2.0

Jak OIDC rozšiřuje OAuth o identitu. ID Token, UserInfo, discovery.

Weiterlesen →
aiintermediate02. 02. 2023

WebSocket Real-time App

WebSocket server a klient. Chat, notifications, live updates.

Weiterlesen →
dataintermediate01. 02. 2023

Elasticsearch tutorial

Full-text search, indexing, queries, aggregations.

Weiterlesen →
dataintermediate28. 01. 2023

Apache Iceberg — otevřený table format pro data lake

Apache Iceberg — hidden partitioning, schema evolution a time travel. Vendor-neutral.

Weiterlesen →
infrastructureintermediate22. 01. 2023

Linux Networking — ip, ss, iptables

Síťová správa — příkazy ip, ss, iptables, routing a diagnostika.

Weiterlesen →
cloudadvanced07. 01. 2023

Terraform State Management

Managing Terraform state in team. Remote backend, locking, state operations.

Weiterlesen →
developmentintermediate26. 12. 2022

API debugging: kompletní toolkit

Kompletní toolkit pro API debugging — curl, httpie, Postman, mitmproxy.

Weiterlesen →
cloudintermediate25. 12. 2022

Kubernetes Operators — Vývoj Vlastního Operátoru

Vývoj Kubernetes operátoru s Operator SDK. Reconciliation loop, finalizers a status management.

Weiterlesen →
cloudintermediate13. 12. 2022

Kubernetes Cluster Checklist

Checklist for production Kubernetes cluster — networking, security, monitoring.

Weiterlesen →
cloudintermediate11. 11. 2022

Container Registry

Sprava Docker images. ECR, ACR, GCR, Harbor.

Weiterlesen →
dataintermediate06. 11. 2022

dbt — Data Transformation in Warehouse Using SQL

dbt enables data transformation in warehouse using SQL. Models, tests, documentation and versioning.

Weiterlesen →
cloudintermediate01. 11. 2022

Crossplane — K8s-native IaC

Infrastructure jako Kubernetes resources. Crossplane compositions a claims.

Weiterlesen →
cloudadvanced19. 10. 2022

Terraform from Scratch

Infrastructure as Code with Terraform. Providers, resources, state, and first deployment.

Weiterlesen →
securityintermediate15. 10. 2022

Content Security Policy (CSP) — A Practical Guide

CSP header pro ochranu proti XSS. Direktivy, nonce, reporting.

Weiterlesen →
cloudintermediate14. 10. 2022

external-dns — automatické DNS záznamy

Automatická synchronizace DNS záznamů z Kubernetes Services a Ingress.

Weiterlesen →
developmentintermediate02. 10. 2022

tRPC — End-to-End Type-Safe API Without Extra Code

tRPC eliminates the need for REST/GraphQL schemas. Learn type-safe API with automatic type inference between server...

Weiterlesen →
cloudintermediate02. 10. 2022

Azure Logic Apps — Workflow Automation

Logic Apps designer, konektory, Standard vs Consumption a error handling.

Weiterlesen →
developmentintermediate13. 09. 2022

Elasticsearch Installation

Installation, configuration and first queries.

Weiterlesen →
cloudadvanced05. 09. 2022

Terraform Modules

Reusable Terraform modules. Structure, registry and best practices.

Weiterlesen →
infrastructureintermediate03. 09. 2022

Journalctl — Debugging and Log Analysis

A practical guide to journalctl — filtering, service monitoring and log rotation.

Weiterlesen →
devopsintermediate23. 08. 2022

Grafana — Efektivní Dashboardy

Best practices pro Grafana dashboardy. Dashboard as Code, provisioning, alerting a design principy.

Weiterlesen →
developmentintermediate20. 08. 2022

Rust Error Handling

Result, Option, ? operátor, custom errors. Rust error handling idiomy.

Weiterlesen →
developmentintermediate12. 08. 2022

Web Components in 2025 — Shadow DOM, Custom Elements and Lit

A complete guide to Web Components in 2025. Custom Elements, Shadow DOM, HTML Templates, the Lit framework and...

Weiterlesen →
cloudintermediate04. 08. 2022

AWS S3 + CloudFront

Static hosting with S3 and CDN distribution via CloudFront.

Weiterlesen →
cloudadvanced03. 08. 2022

The Complete Guide to Terraform

Terraform od základů — providers, resources, state, modules, best practices.

Weiterlesen →
developmentintermediate03. 08. 2022

Open Source: How to Start Contributing

How to start contributing to open source — find project, first PR, community.

Weiterlesen →
cloudintermediate28. 07. 2022

Google BigQuery — Serverless Data Warehouse

BigQuery architektura, partitioning, clustering, ML a cost control.

Weiterlesen →
developmentintermediate17. 07. 2022

Docker Networking deep dive

Docker networking — bridge, host, overlay, DNS a debugging.

Weiterlesen →
dataintermediate16. 07. 2022

Database Migration Checklist

Database migration checklist — planning, testing, rollback, zero-downtime.

Weiterlesen →
cloudintermediate11. 07. 2022

Infrastructure as Code — Pokročilé Patterns

IaC best practices. Terraform modules, state management, testing a drift detection.

Weiterlesen →
securityadvanced03. 07. 2022

Zero Trust Architecture — Never Trust, Always Verify

Zero trust principles, implementation, micro-segmentation, identity-based access.

Weiterlesen →
developmentintermediate02. 07. 2022

CSS Subgrid — A Complete Guide to Nested Grids

CSS Subgrid allows nested elements to inherit grid definition from parent. Learn practical patterns for card...

Weiterlesen →
dataintermediate25. 06. 2022

CAP Theorem prakticky

Praktické dopady CAP theoremu na design. CP vs AP systémy.

Weiterlesen →
developmentintermediate22. 06. 2022

The Complete Guide to Docker

Docker od nuly — images, containers, Dockerfile, Compose, networking, volumes.

Weiterlesen →
developmentintermediate21. 06. 2022

SRE — Capacity Planning

Infrastructure capacity planning. Forecasting, load testing, headroom and growth modeling.

Weiterlesen →
dataintermediate20. 06. 2022

Kafka Connect — integrace systémů bez kódu

Kafka Connect propojuje Kafka s databázemi, soubory a cloud službami. Source a sink konektory bez programování.

Weiterlesen →
devopsintermediate18. 06. 2022

Alerting Best Practices

Effective alerting for production systems. Alert design, routing, grouping and noise reduction.

Weiterlesen →
dataintermediate04. 06. 2022

Apache Spark — distribuované batch zpracování velkých dat

Apache Spark je engine pro distribuované zpracování dat. DataFrame API, Spark SQL a optimalizace.

Weiterlesen →
cloudintermediate03. 06. 2022

AWS Lambda Tutorial

Serverless functions on AWS. Triggers, cold start, layers, and best practices.

Weiterlesen →
developmentintermediate17. 05. 2022

Python: 25 one-linerů pro produktivitu

25 Python one-linerů — HTTP server, JSON formatting, generování hesel a další.

Weiterlesen →
cloudintermediate11. 05. 2022

Kubernetes Backup a Disaster Recovery

Strategie zálohování a obnovy Kubernetes clusterů. Velero, etcd backup, PV snapshots a DR plány.

Weiterlesen →
dataintermediate08. 05. 2022

Kafka vs RabbitMQ

Event streaming vs message broker — architecture and use cases.

Weiterlesen →
cloudintermediate11. 04. 2022

Backup Strategy Checklist

Backup checklist — 3-2-1 rule, testing, retention, encryption.

Weiterlesen →
dataintermediate10. 04. 2022

Docker Volumes a Storage

Správa dat v Dockeru — volumes, bind mounts a best practices.

Weiterlesen →
infrastructureintermediate08. 03. 2022

The Complete Guide to the Linux Command Line

Linux příkazový řádek od základů — navigace, soubory, procesy, networking, scripting.

Weiterlesen →
developmentadvanced03. 03. 2022

Terraform vs Pulumi

Infrastructure as Code — HCL vs programming languages.

Weiterlesen →
guidebeginner28. 02. 2022

Progressive Web Apps (PWA) — A Complete Guide 2025

A complete guide to building Progressive Web Apps. Service Workers, Web App Manifest, offline strategies, push...

Weiterlesen →
cloudintermediate16. 02. 2022

GitOps — Infrastructure from Git

GitOps principles, ArgoCD, ApplicationSets, and progressive delivery.

Weiterlesen →
cloudintermediate12. 02. 2022

AWS VPC — Virtual Private Cloud

VPC design, subnets, NAT Gateway, Transit Gateway, and security groups.

Weiterlesen →
developmentintermediate12. 01. 2022

Advanced gRPC Patterns — Streaming, Interceptors and Error Handling

Advanced gRPC patterns for production systems. Bidirectional streaming, interceptors, deadline propagation, error...

Weiterlesen →
cloudadvanced08. 01. 2022

Terraform Drift Detection

Drift detection, terraform plan -refresh-only, prevention and remediation.

Weiterlesen →
infrastructureintermediate08. 01. 2022

tcpdump tutorial

Zachytávání paketů, filtrování a ukládání pro Wireshark.

Weiterlesen →
developmentintermediate03. 01. 2022

CSS Container Queries — Next-Generation Responsive Design

Container Queries change responsive design. Learn @container rules, container-type, named containers and practical...

Weiterlesen →
developmentintermediate17. 12. 2021

The Complete Guide to TypeScript

TypeScript od základů — typy, interfaces, generics, utility types, best practices.

Weiterlesen →
dataintermediate03. 12. 2021

PostgreSQL: 15 optimalizačních triků

PostgreSQL optimalizace — indexy, EXPLAIN ANALYZE, connection pooling, vacuum a další.

Weiterlesen →
securityintermediate21. 11. 2021

HTTP/2 a HTTP/3

Multiplexing v HTTP/2, QUIC v HTTP/3 a jak nasadit.

Weiterlesen →
infrastructureintermediate16. 11. 2021

Proč přejít z Windows na Linux (a kdy ne)

Windows vs Linux pro vývojáře — kdy přejít, kdy zůstat, WSL jako kompromis.

Weiterlesen →
cloudintermediate13. 11. 2021

KEDA — Event-driven Autoscaling

Kubernetes Event-driven Autoscaler. Scaling based on queues, metrics, and external sources — down to zero.

Weiterlesen →
developmentintermediate12. 10. 2021

VPN: kdy a proč používat

VPN průvodce — kdy má smysl, komerční vs vlastní, WireGuard setup.

Weiterlesen →
infrastructureintermediate01. 10. 2021

DNS konfigurace — BIND a CoreDNS

BIND pro tradiční nasazení, CoreDNS pro Kubernetes.

Weiterlesen →
devopsintermediate28. 09. 2021

Prometheus Alerting Rules

Konfigurace alertů v Prometheus. PrometheusRule, Alertmanager routing a best practices.

Weiterlesen →
dataintermediate25. 09. 2021

PostgreSQL Installation and Configuration

Complete guide to PostgreSQL installation and configuration.

Weiterlesen →
guideintermediate07. 09. 2021

The Complete Guide to OAuth/OIDC

OAuth 2.0 a OpenID Connect — flows, tokeny, best practices.

Weiterlesen →
developmentintermediate28. 08. 2021

CORS konfigurace — Cross-Origin Resource Sharing

Správná konfigurace CORS. Preflight requesty, Access-Control hlavičky.

Weiterlesen →
architectureintermediate17. 08. 2021

API Gateway Design — kdy a jak

Jak navrhnout API Gateway pro mikroservisní architekturu. Routing, autentizace, rate limiting a best practices.

Weiterlesen →
dataintermediate05. 08. 2021

Redis Streams

Persistent event streaming with consumer groups.

Weiterlesen →
developmentintermediate21. 07. 2021

Java vs Kotlin

Java — stability and ecosystem. Kotlin — modern syntax on the JVM.

Weiterlesen →
cloudintermediate15. 07. 2021

AWS vs Azure vs GCP

Comparison of the three major cloud providers — services, pricing, and ecosystem.

Weiterlesen →
developmentintermediate15. 07. 2021

REST vs GraphQL vs gRPC

Three major API paradigms — REST, GraphQL, and gRPC.

Weiterlesen →
infrastructureintermediate05. 07. 2021

IPv6 migrace

Dual-stack, adresování, konfigurace a testování.

Weiterlesen →
architectureadvanced26. 06. 2021

MongoDB Sharding

Horizontal scaling of MongoDB.

Weiterlesen →
developmentintermediate25. 06. 2021

CI/CD pipeline za 5 minut

Funkční CI/CD pipeline za 5 minut s GitHub Actions. Build, test, deploy.

Weiterlesen →
securityintermediate04. 06. 2021

WAF konfigurace — Web Application Firewall

ModSecurity, AWS WAF, Cloudflare WAF. Pravidla a false positives.

Weiterlesen →
developmentintermediate08. 05. 2021

OIDC implementace v Node.js a React — od teorie k praxi

Praktická implementace OpenID Connect v Node.js backendu a React frontendu. Keycloak integrace, token management,...

Weiterlesen →
cloudintermediate12. 04. 2021

Vertical Pod Autoscaler

Automatic CPU and memory configuration for containers. Recommendations and auto-update.

Weiterlesen →
developmentintermediate28. 03. 2021

Nejlepší programovací jazyk pro začátečníky

Jaký programovací jazyk se naučit jako první? Srovnání Python, JavaScript, Java, Go.

Weiterlesen →
developmentintermediate07. 03. 2021

OWASP Top 10: Vulnerable and Outdated Components

How to manage dependencies and protect against vulnerabilities in third-party libraries.

Weiterlesen →
dataintermediate13. 01. 2021

Schema Registry — centrální správa schémat pro streaming

Schema Registry verzuje schémata v Kafka ekosystému. Avro, Protobuf a kompatibilitní strategie.

Weiterlesen →
cloudintermediate05. 01. 2021

AWS EKS — Managed Kubernetes

Elastic Kubernetes Service. Cluster setup, node groups, Fargate profiles, IRSA a add-ons.

Weiterlesen →
dataintermediate21. 12. 2020

Lakehouse vs Data Warehouse — When to Choose Which Approach

Comparison of lakehouse and traditional data warehouse. Architecture, costs, performance and migration.

Weiterlesen →
developmentintermediate04. 12. 2020

HAProxy tutorial

Instalace, konfigurace, health checks, SSL a monitoring.

Weiterlesen →
architectureintermediate21. 11. 2020

Shared Database Anti-pattern

Why shared database in microservices is an anti-pattern and how to get out of it.

Weiterlesen →
developmentintermediate20. 11. 2020

Load Testing s k6 — výkonnostní testování moderních API

A complete guide to load testing with k6 from Grafana Labs. JavaScript scripting, load scenarios, thresholds,...

Weiterlesen →
developmentintermediate17. 11. 2020

Functional Programming principy

Pure functions, immutability, higher-order functions. FP v praxi.

Weiterlesen →
cloudintermediate07. 09. 2020

Ingress Controllers — Nginx a Traefik

HTTP routing v Kubernetes. Nginx Ingress, Traefik, TLS terminace a path-based routing.

Weiterlesen →
architectureintermediate17. 08. 2020

Monolith vs Microservices: When to Use What

Monolith vs microservices — advantages, disadvantages, when to switch.

Weiterlesen →
devopsintermediate12. 08. 2020

Bash Scripting from Scratch — A Complete Guide

Naučte se Bash scripting od základů — proměnné, podmínky, cykly, funkce a praktické skripty.

Weiterlesen →
devopsintermediate03. 07. 2020

Prometheus Operator a kube-prometheus-stack

Prometheus Operator pro Kubernetes monitoring. ServiceMonitor, PrometheusRule a Alertmanager konfigurace.

Weiterlesen →
cloudintermediate23. 06. 2020

Sealed Secrets — Secrets in Git

Encrypted secrets for GitOps. Safely storing secrets in Git repositories.

Weiterlesen →
cloudintermediate08. 06. 2020

Kubernetes CRDs — Custom Resource Definitions

Rozšíření Kubernetes API vlastními resource typy. CRD definice, validace, verzování a best practices.

Weiterlesen →
dataintermediate02. 06. 2020

Metabase — open-source BI pro self-serve analytiku

Metabase je open-source BI platforma. Query builder, dashboardy a embedding.

Weiterlesen →
developmentintermediate28. 05. 2020

Java 21 Virtual Threads

Project Loom — virtual threads pro masivní concurrency.

Weiterlesen →
dataintermediate24. 05. 2020

Database per Service

Proč by měla mít každá mikroservisa vlastní databázi a jak řešit dotazy napříč službami.

Weiterlesen →
dataintermediate12. 05. 2020

PostgreSQL EXPLAIN ANALYZE

Reading query plans — scans, joins, cost and optimization.

Weiterlesen →
developmentintermediate11. 05. 2020

Design System with Web Components — Framework-Agnostic Approach

How to build a framework-agnostic design system using Web Components. Theming, slots, CSS custom properties and NPM...

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developmentintermediate06. 05. 2020

React Concurrent Features — useTransition and useDeferredValue

Learn to use React concurrent features — useTransition, useDeferredValue and Suspense for smooth user interfaces...

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developmentintermediate26. 03. 2020

Monolith vs Microservices

When monolith and when microservices — trade-offs and decision-making.

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developmentintermediate14. 03. 2020

React State Management in 2025 — Zustand, Jotai, and Valtio

Comparison of modern state management libraries for React. Zustand, Jotai, Valtio — when to use which one and how...

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architectureintermediate10. 03. 2020

The Complete Guide to Kafka

Apache Kafka — event streaming, topics, partitions, consumer groups.

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developmentintermediate09. 03. 2020

CSS Cascade Layers (@layer) — End of Specificity Wars

CSS @layer brings control over style cascading. Learn to organize CSS into layers, resolve specificity conflicts and...

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cloudintermediate07. 02. 2020

GitOps s Helm Charts

Helm charts v GitOps workflow. Chart design, values management, dependency management a automated upgrades.

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dataintermediate05. 02. 2020

Analytics engineering — role mezi daty a business

Analytics engineering spojuje data engineering a business analytics. dbt, modelování a self-serve.

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cloudintermediate14. 12. 2019

Azure Functions Tutorial

Serverless na Azure. HTTP triggers, bindings, Durable Functions.

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cloudintermediate11. 12. 2019

Kubernetes Pod Lifecycle

Pod lifecycle in Kubernetes. Phases, init containers, probes, and graceful shutdown.

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architectureintermediate14. 11. 2019

Microservices Patterns — A Complete Guide

Overview of the most important design patterns for microservice architecture. From decomposition to inter-service...

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developmentintermediate07. 11. 2019

CSS View Transitions API — Smooth Page Transitions

View Transitions API enables smooth animated transitions between pages in both SPA and MPA. Learn cross-document...

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developmentintermediate23. 10. 2019

Vue 3 Composition API

Composition API vs Options API. Reaktivita, composables, lifecycle.

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securityintermediate10. 10. 2019

Security audit checklist

Kompletní security audit checklist pro webové application a infrastrukturu.

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developmentintermediate02. 10. 2019

Python Virtual Environments

venv, virtualenv, conda. Why and how to isolate Python projects.

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infrastructureintermediate28. 09. 2019

Apache vs Nginx

Srovnání Apache a Nginx — architektura, výkon, kdy co.

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developmentintermediate14. 09. 2019

TypeScript od nuly

Jak začít s TypeScript. Typy, interfaces, generics, konfigurace.

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developmentintermediate13. 09. 2019

How to Choose Tech Stack for Startup

How to choose tech stack for startup — development speed, scalability, hiring.

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securityintermediate01. 08. 2019

SAST nástroje — statická analýza kódu

Semgrep, SonarQube, CodeQL. Jak najít zranitelnosti v kódu bez spuštění.

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dataintermediate03. 07. 2019

DuckDB — analytická databáze přímo ve vašem notebooku

DuckDB je embedded OLAP databáze. Zero dependency, SQL nad CSV, Parquet a JSON.

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cloudintermediate20. 05. 2019

Docker vs Podman

Docker vs Podman — daemon, rootless, ecosystem, and migration.

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developmentintermediate22. 04. 2019

Astro Islands — Partial Hydration Architecture

Astro Islands architecture enables selective component hydration. Learn client directives, React/Vue/Svelte...

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infrastructureintermediate13. 04. 2019

Nginx jako Reverse Proxy

Nginx reverse proxy — load balancing, WebSocket, caching, rate limiting.

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dataintermediate21. 03. 2019

MySQL vs PostgreSQL

Two most popular open-source relational databases.

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developmentintermediate15. 02. 2019

XSS prevence — Cross-Site Scripting ochrana

Stored, Reflected a DOM-based XSS. Sanitizace, CSP, encoding.

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devopsintermediate08. 02. 2019

Grafana Tempo — Distributed Tracing

Grafana Tempo pro distributed tracing. Object storage backend, TraceQL dotazy a integrace s Grafana stackem.

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securityadvanced06. 01. 2019

Incident Response Plan — jak reagovat na bezpečnostní incident

Postup při bezpečnostním incidentu. Preparation, detection, containment, recovery.

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securityintermediate07. 09. 2018

Cloudflare setup

DNS, proxy, SSL, Page Rules a DDoS ochrana.

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developmentintermediate27. 06. 2018

JavaScript Modern Syntax (ES2024)

Nejnovější JavaScript features. Array grouping, Temporal, decorators.

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securityadvanced12. 05. 2018

mTLS v praxi

Vzájemná TLS autentizace, certifikáty a nasazení.

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developmentintermediate07. 05. 2018

Performance debugging: krok za krokem

Systematický přístup k performance debugging — měření, bottlenecky, optimalizace.

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developmentintermediate16. 04. 2018

Docker: 10 Mistakes Every Beginner Makes

10 most common Docker mistakes and how to avoid them. From :latest tag to missing resource limits.

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infrastructurebeginner04. 04. 2018

Nginx konfigurace od nuly

A complete guide to Nginx — installation, virtual hosts, SSL, performance.

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cloudintermediate25. 02. 2018

AWS ECS — Container Orchestration

Elastic Container Service. Task definitions, services, Fargate vs EC2, service discovery.

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architectureadvanced05. 02. 2018

Sharding strategie

Horizontální dělení dat. Hash, range, consistent hashing.

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developmentintermediate15. 01. 2018

FastAPI tutorial — moderní Python API

Jak postavit REST API s FastAPI. Routing, validace, OpenAPI, async.

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developmentintermediate10. 01. 2018

GDPR Compliance Checklist

GDPR compliance checklist for developers — consent, subject rights, technical measures.

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securityadvanced27. 12. 2017

mTLS — Mutual TLS vysvětlení

Co je mutual TLS, kdy ho použít a jak nakonfigurovat.

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developmentintermediate14. 11. 2017

SEO technical checklist

Technický SEO checklist — meta tagy, sitemap, Core Web Vitals, structured data.

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developmentintermediate05. 07. 2017

Pulumi — IaC v reálném jazyce

Pulumi s TypeScript/Python, component resources, stacks a testing.

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developmentintermediate11. 05. 2017

Git: jak opravit (skoro) každou chybu

Jak opravit nejčastější Git chyby — špatný commit, branch, ztracené změny.

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architectureadvanced07. 05. 2017

Clean Architecture — vrstvy a závislosti

Robert C. Martin's Clean Architecture. Pravidlo závislostí, entity, use cases a implementace.

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devopsintermediate28. 02. 2017

Jenkins — Moderní Pipeline Patterns

Jenkins shared libraries, deklarativní pipeline, parallel stages a Kubernetes-based agents.

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devopsintermediate10. 09. 2016

CI/CD Best Practices

Osvedcene postupy pro CI/CD pipeline. Rychlost, spolehlivost, bezpecnost.

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developmentintermediate17. 08. 2016

API Testing Automation — Strategies and Tools

A complete guide to automated API testing. REST, GraphQL, gRPC — tools, strategies, mocking and CI/CD pipeline integration.

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developmentintermediate20. 07. 2016

On-call Survival Guide

A practical guide to on-call — preparation, escalation, runbooks, postmortems.

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infrastructureintermediate23. 02. 2016

CDN konfigurace — obsah blíže uživateli

Konfigurace CDN pro webové aplikace. CloudFront, Cloudflare, cache headers.

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developmentintermediate19. 01. 2016

Backends for Frontends (BFF)

BFF pattern: a separate backend for each client type. Web, mobile, IoT — each has different needs.

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developmentintermediate22. 06. 2015

Dependency Scanning — Vulnerability Detection

Trivy, Snyk, npm audit. How to find vulnerable libraries.

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