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)
Complete Guide to Terraform Modules
Build reusable Terraform modules with proper structure, inputs, outputs, and versioning. Covers...
Complete Guide to React Performance Optimization
Optimize React apps for speed. Covers memoization, virtualization, code splitting, bundle analysis,...
Complete Guide to AWS Cost Optimization
Reduce AWS cloud spend by 40%. Covers EC2 right-sizing, Spot instances, Reserved Instances, Savings...
Complete Guide to Web Security Headers
Implement CSP, HSTS, X-Frame-Options, and secure headers. Covers content security policy, CORS,...
Merge JSON Files in JavaScript
Combine multiple JSON files with conflict resolution strategies using Node.js.
Generate QR Codes with Python
Create QR codes for URLs, text, and contact cards using the qrcode library in Python.
Batch Resize Images with Python
How to bulk resize and optimize images using Pillow and Python for web delivery.
Find and Remove Duplicate Rows in SQL
Detect duplicate records in SQL tables using GROUP BY and HAVING, then remove them safely while...
Set Up Full-Text Search Indexes
Configure full-text search indexes in PostgreSQL to query large text columns with ranking,...
Analyze and Optimize SQL Indexes with EXPLAIN
Identify missing, unused, and inefficient indexes by reading execution plans and measuring query...
Zero-Downtime Column Rename Migration
Rename columns or change data types without locking tables by using views, triggers, and backfill...
Partition Large Tables by Date or Range
Split huge SQL tables into smaller partitions by date, range, or list to improve query performance...
Traverse Hierarchical Data with Recursive CTEs
Query tree-like or graph-like structures in SQL using recursive common table expressions to walk...
Rank Rows and Calculate Running Totals with Window Functions
Use SQL window functions to rank rows, compute running totals, and compare values within partitions...
Microservices Communication Patterns
Choose between synchronous and asynchronous communication patterns for resilient microservices...
Gateway Routing Pattern
Route requests to multiple backend services through a single entry point that handles cross-cutting...
Health Endpoint Monitoring Pattern
Expose lightweight health endpoints so orchestrators, load balancers, and monitoring tools can...
Leader Election Pattern
Coordinate a single active instance among multiple distributed nodes to avoid conflicts and...
Backup Verification Test Template
A template to plan and document backup verification tests, ensuring restore procedures work before...
Compliance Gap Analysis Template
A template for mapping current security controls to compliance frameworks like SOC 2, ISO 27001,...
Dependency Vulnerability Report Template
A template for documenting security findings in dependencies, including severity, impact, and...
Environment Configuration Template
A template to document environment variables, secrets, endpoints, and infrastructure settings per...
Load Test Execution Plan Template
A template to plan, execute, and document load tests that measure system behavior under realistic...
Logging Standards Document
A document template for defining structured logging conventions, log levels, retention, and...