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)
HMAC Request Signing
Secure API requests with HMAC-SHA256 signatures to ensure integrity and authenticity.
Password Hashing in Production
Securely hash and verify passwords using bcrypt, scrypt, and Argon2 with what works.
Security Headers
Harden web applications with HTTP security headers: CSP, HSTS, X-Frame-Options, and a thorough...
API Mocking for Testing
Build reliable tests by mocking external APIs with WireMock, MockServer, and MSW to eliminate...
Build a Slack Bot with OpenAI GPT-4
How to build a conversational Slack bot powered by OpenAI GPT-4 that responds to mentions and...
Express.js Middleware Composition Patterns
Build maintainable Express applications using middleware composition patterns for authentication,...
Build a GraphQL API with Apollo Server and TypeScript
How to build a production-ready GraphQL API using Apollo Server, TypeScript, and DataLoader to...
Configure Nginx as a Reverse Proxy and API Gateway
How to use Nginx as a reverse proxy for backend services, implement load balancing, SSL...
WebSocket Authentication and Security Patterns
How to authenticate WebSocket connections, implement token validation, and handle authorization for...
Deep Clone Objects in JavaScript: Beyond JSON.parse
Compare deep clone strategies including JSON.parse, structuredClone, manual recursion, and library...
Prevent Race Conditions in JavaScript Async Code
Identify and fix race conditions in asynchronous JavaScript using proper sequencing, atomic...
URL Encoding and Decoding
Master URL encoding in JavaScript and other languages with encodeURI, encodeURIComponent, plus-safe...
UUID Generation: v4, v7, and ULID Comparison
Compare UUID v4, v7, ULID, and nanoid for generating unique identifiers with different tradeoffs in...
Implement ACID Transactions in PostgreSQL
How to use PostgreSQL transactions to ensure Atomicity, Consistency, Isolation, and Durability for...
Prevent and Resolve Deadlocks in SQL Transactions
Identify deadlock patterns in SQL databases, apply consistent lock ordering, use appropriate...
CRUD Operations with MongoDB and Mongoose
How to perform Create, Read, Update, and Delete operations in MongoDB using Mongoose ODM with...
PostgreSQL Query Optimization and Indexing Strategies
Analyze and optimize slow PostgreSQL queries using EXPLAIN, proper indexing, partial indexes, and...
Redis Cache Patterns for High-Performance Applications
How to implement cache-aside, write-through, and write-behind patterns with Redis to reduce...
Deploy Containers to AWS ECS with Fargate
How to deploy Docker containers to AWS ECS using Fargate serverless compute with Terraform and...
Bash Scripting for DevOps Automation and System Tasks
How to write reliable Bash scripts for automating deployments, system monitoring, log rotation, and...
Container Image Security Scanning with Trivy
Scan Docker images for vulnerabilities, misconfigurations, and secrets using Trivy, integrate...
Local Microservices Development with Docker Compose
Orchestrate multi-service local environments with Docker Compose including databases, caches,...
Deploy Applications to Kubernetes with Helm Charts
Package, version, and deploy Kubernetes applications using Helm charts with value overrides,...
Canary Deployments with Istio Service Mesh
How to use Istio traffic splitting to perform safe canary deployments by gradually shifting user...