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 (1032)
Docker for Developers — A Complete Guide
Learn Docker from the ground up: images, containers, Dockerfiles, networks, volumes, and Docker Compose for local development.
Git Branching Strategies: A Practical Guide
Compare trunk-based development, GitFlow, and GitHub Flow. Choose the right branching strategy for your team size, release cadence, and...
Infrastructure as Code — Terraform and Pulumi
A practical guide to managing infrastructure as code: benefits of declarative vs imperative approaches, state management, modules, and...
Kubernetes Basics for Application Developers
Learn the core Kubernetes concepts every developer needs: Pods, Services, Deployments, ConfigMaps, and basic kubectl commands.
Monitoring and Alerting — Metrics, Logs, and Dashboards
A practical guide to observability: the three pillars (metrics, logs, traces), RED and USE methods, alert design, and building dashboards...
On-Call and Incident Response Playbook
A practical playbook for on-call engineers: triage, escalation, communication, and postmortems. Reduce MTTR and build a resilient incident...
Technical Documentation Strategy: Docs as Code
A practical guide to treating documentation as code: versioning, review workflows, structure, and tools that keep docs accurate,...
API Security Checklist — Authentication to Encryption
A thorough security checklist for APIs: authentication, authorization, input validation, rate limiting, encryption, logging, and deployment...
Web Application Security (OWASP Top 10)
A developer-focused guide to the OWASP Top 10: injection, broken access control, XSS, insecure design, and how to prevent each...
Test-Driven Development (TDD) — A Practical Workflow
Learn TDD step by step: write a failing test, make it pass, refactor. Red-Green-Refactor with real examples in Python, JavaScript, and Java.
API Versioning
How to version REST and GraphQL APIs to maintain backward compatibility while evolving your interface.
Idempotent API Endpoints
How to design and implement idempotent API endpoints that safely handle retries, duplicate requests, and network failures without side...
Send Emails with SMTP
How to send transactional and bulk emails securely using SMTP with template support.
Server-Sent Events (SSE)
How to implement one-way real-time streaming from server to browser using Server-Sent Events, with reconnection, event types, and...
Webhooks
How to create and consume webhook endpoints for real-time event-driven integrations.
WebSocket Server
How to build a WebSocket server for bidirectional real-time communication, with connection management, message broadcasting, and heartbeat...
OAuth 2.0 Login
How to implement OAuth 2.0 authentication with Google, GitHub, and other providers.
Two-Factor Authentication (2FA / TOTP)
How to implement time-based one-time password (TOTP) two-factor authentication for secure user login.
Money and Currency Handling
How to represent, parse, format, and calculate monetary values accurately across currencies.
Caching with Redis
How to implement application caching using Redis for performance and scalability.
Database Migrations Safely
How to run database schema migrations without downtime or data loss.
Full-Text Search
How to implement full-text search with Elasticsearch, Meilisearch, and PostgreSQL.
Soft Deletes
How to implement soft deletes to preserve data while hiding records from normal queries.
Background Jobs
How to schedule and run background jobs using cron, task queues, and workers.