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)
Dependency Vulnerability Triage Template
Template for triaging CVEs by severity and impact: vulnerability scoring, exploitability...
Serverless Security Checklist
Security hardening checklist for serverless functions: IAM least privilege, secret management,...
Complete Guide to LangChain in Production
Run LangChain in production. Covers chains, agents, memory, tools, LCEL, streaming, callbacks, RAG...
Complete Guide to LLM Application Architecture
Build production LLM applications end-to-end. Covers API layers, prompt management, streaming,...
Complete Guide to LLM Cost Optimization
Optimize LLM costs in production. Covers model routing, prompt compression, caching, batch API,...
Complete Guide to LLM Evaluation
Evaluate LLM applications in production. Covers RAGAS, LLM-as-judge, human evaluation, A/B testing,...
Complete Guide to LLM Security
Secure LLM applications in production. Covers prompt injection, jailbreaks, data leakage, OWASP Top...
Complete Guide to RAG in Production
Build production RAG systems. Covers chunking strategies, embedding models, vector stores,...
Complete Guide to Vector Databases
Compare and use vector databases in production. Covers Pinecone, Weaviate, Chroma, pgvector,...
GraphQL Federation in Production
Run federated GraphQL in production with confidence. Covers subgraph composition, gateway...
Complete Guide to GraphQL Schema Design
Design GraphQL schemas for evolution, performance, and maintainability. Covers type design,...
Complete Guide to GraphQL Testing
Test GraphQL APIs at every layer: unit tests for resolvers, integration tests for schema, E2E tests...
Complete Guide to Redis Caching Strategies
Master Redis caching with cache-aside, read-through, write-through, write-behind, and refresh-ahead...
Complete Guide to Go Concurrency
Master Go concurrency in production. Covers goroutines, channels, context, select, sync primitives,...
Complete Guide to Java Concurrency
Master Java concurrency in production. Covers threads, locks, CompletableFuture, virtual threads,...
Complete Guide to Python Asyncio in Production
Run Python asyncio in production with confidence. Covers event loops, task management, debugging,...
Complete Guide to MongoDB Indexing
Master MongoDB indexing. Covers single field, compound, text, geospatial, TTL, wildcard, hashed...
Complete Guide to PostgreSQL Replication
Master PostgreSQL replication. Covers streaming replication, logical replication, cascading...
Complete Guide to Redis in Production
Run Redis in production. Covers persistence (RDB, AOF), clustering, sentinel for HA, failover...
Complete Guide to SQL Query Optimization
Optimize SQL queries. Covers EXPLAIN plan analysis, index strategies, join optimization, N+1 query...
Complete Guide to Docker in Production
Run Docker containers in production with confidence. Covers multi-stage builds, distroless images,...
Complete Guide to Kubernetes Networking
Master Kubernetes networking. Covers Services, Ingress, NetworkPolicies, CNI plugins, DNS, service...
Complete Guide to Terraform in Production
Manage infrastructure as code with Terraform in production. Covers modules, state management,...
Complete Guide to CSS Grid and Flexbox
Master modern CSS layout with Grid and Flexbox. Covers grid templates, areas, subgrid, responsive...