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)
Write Large Files
How to write large files efficiently using buffered and streaming output.
Escape HTML Entities
How to escape HTML entities to prevent XSS attacks in Python, Java, and JavaScript.
Multi-Tenancy Architecture
Design multi-tenant applications with shared or isolated databases, tenant-aware routing, and data...
Service Discovery
Implement service discovery with health checks, DNS-based resolution, and service registries for...
Workflow Engines
Orchestrate complex business processes with workflow engines, state machines, and long-running task...
Database Replication
Set up and manage database replication for high availability, read scaling, and disaster recovery...
Database Schema Evolution
Evolve database schemas safely with backward-compatible changes, versioned migrations, and online...
Immutable Infrastructure
Build immutable infrastructure with versioned machine images and containers to eliminate...
Cloud Cost Optimization Recipe
Reduce cloud infrastructure costs with right-sizing, reserved instances, spot instances, and...
Event-Driven Microservices
Design event-driven microservices with message brokers, event sourcing, CQRS, and eventual...
Log Aggregation
Centralize logs from distributed services with ELK, Fluentd, and Loki for search, alerting, and...
Metrics Collection
Collect, aggregate, and expose application and infrastructure metrics with Prometheus, StatsD, and...
Container Security Scanning
Scan container images for vulnerabilities, misconfigurations, and secrets with Trivy, Clair, and...
Data Privacy and GDPR Compliance
Implement data privacy controls, consent management, data anonymization, and GDPR-compliant data...
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.
Configure Nginx as a Reverse Proxy and API Gateway
How to use Nginx as a reverse proxy for backend services, implement load balancing, SSL...
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...
UUID Generation: v4, v7, and ULID Comparison
Compare UUID v4, v7, ULID, and nanoid for generating unique identifiers with different tradeoffs in...
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...