Mathias Paulenko
Software Engineer & Founder of StackPractices
Mathias Paulenko
Software Engineer
Software engineer with 12+ years of experience building production systems across Python, JavaScript, React, and DevOps. I have contributed to enterprise projects spanning CI/CD pipelines, API design, cloud infrastructure, and full-stack development.
StackPractices is my personal project, born from a simple belief: great documentation should be copy-paste ready. Every recipe, pattern, and guide on this site is designed to save you time and help you ship faster.
Published Works (1008)
Implement Cache Invalidation Strategies
How to keep caches consistent with databases using TTL, write-through, write-behind, and...
Optimize Slow Database Queries
How to identify, analyze, and fix slow SQL queries using EXPLAIN, query refactoring, and...
Web Performance Optimization
Improve Core Web Vitals, reduce bundle sizes, and optimize frontend performance with lazy loading,...
Measure Test Coverage
How to measure, report, and enforce code coverage with branch and condition coverage using...
Interpreter Pattern for Domain-Specific Expression Languages
Build a language interpreter that evaluates expressions and rules by representing grammar as...
Message Deduplication Pattern
Prevent duplicate processing by tracking message IDs with idempotency keys. Consumers check a store...
Slim Production Images with Multi-Stage Docker Builds
How to build minimal production Docker images using multi-stage builds with distroless base images,...
Across Multiple OS and Language Versions with GitHub
How to use GitHub Actions matrix strategy to test across multiple operating systems, language...
Share Workflow Logic with GitHub Actions Reusable Workflows
How to create and consume reusable workflows in GitHub Actions, covering inputs, secrets,...
Mount Configs and Secrets into Kubernetes Pods
How to mount ConfigMaps and Secrets into Kubernetes pods using env vars, volumes, projected...
Store Terraform State in S3 with DynamoDB Locking
How to configure Terraform remote state with S3 backend and DynamoDB locking, covering state...
Isolate Environments with Terraform Workspaces
How to use Terraform workspaces for environment isolation, covering workspace creation, conditional...
Container Queries for Component Responsiveness
How to use CSS container queries for component-level responsive layouts that adapt to their...
Design Tokens with CSS Custom Properties
How to build a design token system using CSS custom properties, including color scales, spacing,...
When to Use useMemo and useCallback
How and when to use React's useMemo and useCallback hooks for performance optimization, and when...
Virtualize Long Lists with react-window
How to render large lists efficiently in React using react-window for DOM virtualization, including...
Reactive State Management with Svelte Stores
How to manage reactive state in Svelte using writable, readable, derived stores, and custom stores...
Exhaustive Type Checking with Discriminated Unions
How to use TypeScript discriminated unions for exhaustive type checking, ensuring all cases are...
Build Reusable Utility Types with Generics
How to create reusable TypeScript utility types using conditional types, mapped types, template...
Data Fetching with Vue 3 Composition API
How to fetch and manage data in Vue 3 using the Composition API with ref, computed, watch, and...
Custom Health Checks with Spring Boot Actuator
How to implement custom health indicators with Spring Boot Actuator, including database, Redis,...
Rotate Logs Daily with Winston
How to configure daily log rotation in Node.js using winston and winston-daily-rotate-file,...
Distributed Tracing with OpenTelemetry
How to implement distributed tracing in Python with OpenTelemetry SDK, including spans, context...
Structured JSON Logging with structlog
How to emit structured JSON logs in Python using structlog, including context binding, log levels,...