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)
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...
Load Balancing with HAProxy and Health Checks
Configure HAProxy as a high-performance load balancer with active health checks, sticky sessions,...
Provision an AWS VPC with Terraform
How to use Terraform to provision a production-ready AWS VPC with public and private subnets, NAT...
Event Streaming with Apache Kafka and Node.js
Build growth-ready event-driven systems using Apache Kafka with producers, consumers, consumer...
Load Testing APIs with k6 and Threshold-Based Assertions
How to write and run load tests with k6 to measure API performance, validate SLOs, and identify...
SPA Performance: Code Splitting and Lazy Loading
Improve single-page application load times by splitting bundles at route and component level,...
Schema-Based Data Validation with Zod in TypeScript
Validate and sanitize incoming data using Zod schemas with TypeScript inference, custom...
Implement OAuth 2.0 PKCE for Single-Page Applications
How to implement the OAuth 2.0 PKCE flow in single-page applications to securely authenticate users...
Live Database Credentials with HashiCorp Vault
How to use HashiCorp Vault to generate short-lived database credentials, eliminating hardcoded...
Snapshot Testing React Components with Jest
How to use Jest snapshot testing to catch unintended UI regressions in React components and prevent...
Abstract Factory for Cross-Platform UI Component Families
Create families of related objects without specifying concrete classes, enabling platform-specific...