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)
Build Resilient Systems with the Circuit Breaker Pattern
How to prevent cascading failures in distributed systems using circuit breakers with open, closed,...
Chaos Engineering
Build resilient systems by intentionally injecting failures and observing how your distributed...
CI/CD Pipeline Setup
Set up automated CI/CD pipelines for testing, building, and deploying applications with GitHub...
Field-Level Auth with Custom GraphQL Directives
Add field-level authorization to GraphQL with custom schema directives. Check roles, permissions,...
Cold Start Optimization: AWS Lambda, Azure, Cloud Run
Reduce cold start latency across AWS Lambda, Azure Functions and Cloud Run: provisioned...
CDC Pattern: Stream Database Changes to Downstream
How to stream database changes to downstream consumers with CDC. Covers log-based CDC, Debezium,...
Canary Release Pattern
Route a small percentage of traffic to the new version while the rest stays on stable. Monitor...
Chain of Responsibility for Request Processing Middleware
Pass requests along a chain of handlers where each handler decides whether to process the request...
Chain of Responsibility Pattern
Pass requests along a chain of handlers until one handles it. A behavioral design pattern for...
Claim Check Pattern
Store large payloads in external storage and pass a lightweight claim token through the message...
Command Pattern: Examples in Python, Java & JavaScript
Encapsulate a request as an object so you can queue, log, and undo operations. Command pattern with...
Idempotent Consumer Pattern
Process messages from a queue exactly once regardless of duplicates by using idempotent operations,...
Outbox Pattern
Reliably publish domain events by persisting them in an outbox table within the same database...
CDN Cache Rules Template
Template for CDN caching rules and edge behavior: cache keys, TTL by content type, query params,...
Capacity Planning Forecast Template
A structured template for forecasting infrastructure growth, identifying resource bottlenecks, and...
CI/CD Pipeline Design Template
A template for documenting CI/CD pipeline stages, gates, environments, deployment strategies,...
Cloud Resource Tagging Policy Template
A policy template for enforcing consistent labels on cloud resources to improve cost allocation,...
Code Review Checklist Template
A structured checklist template for conducting consistent, thorough code reviews that catch bugs,...
Capacity Planning Template
A reusable template for planning system capacity, estimating growth, and preventing performance...
Complete Guide to AI Agents in Production
Design, deploy, and operate LLM agents that survive real traffic: architectures, tools, memory,...
Complete Guide to API Versioning Strategies
Compare URI, header, query-param and content-negotiation versioning for REST, plus GraphQL schema...
Complete Guide to Application-Level Caching
In-memory, distributed and hybrid caches at the app layer: LRU, TTL, two-tier strategies, sizing,...
Complete Guide to Cache Invalidation
Cache invalidation strategies: TTL, event-driven, versioned keys, tag-based purging, write-through,...
Complete Guide to CDN Caching Strategy
CDN caching for web apps and APIs: edge caching, cache keys, headers, invalidation, surrogate keys,...