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)
Dead Letter Channel Pattern
Route unprocessable messages to a separate dead letter queue for inspection and replay. Prevent...
Lock-Free Queue Pattern
Build high-throughput queues using atomic operations instead of locks. Multiple threads can enqueue...
Message Deferral Pattern
Delay message processing to a scheduled time. Move messages that cannot be processed now to a...
Producer-Consumer Pattern
Decouple production and consumption with a shared queue. Producers generate items at their own...
Publish-Subscribe Pattern
Broadcast events to multiple independent subscribers. Publishers send messages to a topic without...
Reactive Streams Pattern
Process asynchronous data streams with backpressure. Subscribers request N items at a time,...
Serverless DB Connection Pooling Pattern
Manage database connections across serverless invocations by using external connection poolers,...
Thread Pool Pattern
Reuse a fixed set of threads for short-lived tasks instead of creating a new thread per task....
AI Agent Design Document Template
Document AI agent architecture, tools, memory, reasoning patterns, safety guardrails, evaluation...
AI LLM Cost Tracking Template
Track token usage and costs per feature, model, and user. Includes cost categories, pricing tables,...
AI LLM Prompt Template Library
A reusable prompt template library for common LLM tasks: summarization, extraction, classification,...
AI Model Selection Matrix
Compare LLM models by cost, latency, context window, accuracy, and use case. Includes decision...
AI RAG Evaluation Checklist
A checklist for evaluating RAG system quality: retrieval accuracy, generation faithfulness, context...
Cache Eviction Policy Template
Template for documenting cache eviction rules per cache layer: LRU, LFU, TTL, FIFO, random...
Cache Strategy Decision Template
Decision template for choosing cache strategies per use case: no-cache, cache-aside, read-through,...
Cache Warmup Runbook
Runbook for warming caches after deployment, restart, or incident: identify hot keys, preload...
CDN Cache Rules Template
Template for defining CDN caching rules and edge behavior: cache keys, TTL by content type, query...
Async Task Cancellation Runbook
Runbook for safely cancelling long-running async tasks in Python, JavaScript, Go, and Java:...
Race Condition Debugging Checklist
Checklist for identifying and fixing race conditions in concurrent code: symptom identification,...
Thread Pool Sizing Template
Template for documenting thread pool configuration per service: pool type selection, sizing...
Docker Image Hardening Checklist
Checklist for hardening Docker container images for production: base image selection, user...
Kubernetes Resource Quotas Template
Template for defining Kubernetes resource quotas per namespace: CPU and memory limits, object count...
Terraform Module Versioning Policy
Policy for versioning and publishing Terraform modules: semantic versioning rules, breaking change...
GraphQL Deprecation Policy Template
Policy template for deprecating GraphQL fields, types, arguments, and enum values safely. Includes...