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)
Concurrency Patterns Guide
A guide to common concurrency patterns and what works for writing safe, efficient concurrent code.
Database Design Guide
A practical guide to designing relational databases with normalization, indexing, and relationship...
Practical Design Patterns Guide
A guide to selecting and applying the right design pattern for common software engineering problems.
Logging, Monitoring & Observability Guide
A guide to building observable systems with structured logging, metrics, and distributed tracing.
Web Performance Optimization Guide
A thorough guide to optimizing web application performance for better Core Web Vitals and user...
Logging
How to implement structured, level-based logging across Python, JavaScript, and Java with what...
Middleware
How to implement request/response middleware for logging, auth, and error handling across Python,...
Pagination
How to implement cursor-based and offset-based pagination in APIs and databases across Python,...
JWT Authentication
How to generate, validate, and refresh JSON Web Tokens for stateless API authentication.
Date Formatting
How to parse, format, and manipulate dates across timezones using Python, JavaScript, and Java.
Regular Expressions
How to use regular expressions for pattern matching, validation, and text extraction across Python,...
Sort an Array
How to sort arrays and lists in ascending, descending, and custom order across multiple languages.
Database Transactions
How to use ACID transactions to ensure data integrity across Python, JavaScript, and Java with SQL...
SQL Joins
Practical examples of INNER, LEFT, RIGHT, and FULL OUTER JOINs with real-world query patterns.
Cron Jobs
How to schedule and manage recurring tasks using cron syntax across Linux, Python, and Node.js.
Git Workflow
A practical branching strategy for teams: feature branches, pull requests, and clean commit history.
Unit Testing
How to write fast, deterministic unit tests with mocks and assertions in Python, JavaScript, and...
Abstract Factory Pattern
Create families of related objects without specifying concrete classes. A creational design pattern...
Adapter Pattern
Convert the interface of a class into another interface clients expect. A structural design pattern...
Builder Pattern
Construct complex objects step by step. A creational design pattern for readable, configurable...
Command Pattern
Encapsulate a request as an object, letting you parameterize clients with queues, logs, and...
Decorator Pattern
Add new functionality to objects dynamically by wrapping them. A structural design pattern for...
Factory Pattern
Create objects without specifying the exact class to instantiate. A creational design pattern for...
MVC Pattern
Separate application into Model, View, and Controller components. An architectural design pattern...