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)
gRPC in Microservices — High-Performance RPC Guide
A practical guide to gRPC for microservices: Protocol Buffers, streaming, load balancing, and...
Complete Guide to Elasticsearch Cluster Setup
Deploy and scale Elasticsearch clusters in production. Covers node roles, sharding, index...
On-Call and Incident Response Playbook
A practical playbook for on-call engineers: triage, escalation, communication, and postmortems....
Bundle Size Optimization: A Practical Frontend Guide
A hands-on guide to measuring and reducing JavaScript bundle size with tree shaking, code...
Incident Response Process: Step-by-Step Guide
Step-by-step incident response process: severity levels, incident commander roles, communication...
Metrics and Dashboards: A Prometheus & Grafana Guide
A practical guide to metrics and dashboards: instrumenting applications, choosing metric types,...
Express.js Middleware Composition Patterns
Build maintainable Express applications using middleware composition patterns for authentication,...
Server-Sent Events with Node.js and Express
Build server-to-client push with Server-Sent Events in Node.js and Express. Covers connections,...
WebSocket Authentication and Security Patterns
How to authenticate WebSocket connections, implement token validation, and handle authorization for...
URL Encoding and Decoding
Master URL encoding in JavaScript and other languages with encodeURI, encodeURIComponent, plus-safe...
Database Transactions: Python, JavaScript & Java Examples
How to use ACID transactions to ensure data integrity across Python, JavaScript, and Java with SQL...
Docker Secrets Management Without Hardcoding Credentials
Inject secrets into containers using Docker secrets, env files, and external secret managers...
Production Logging in Python, JavaScript and Java
Implement structured, level-based logging with correlation IDs and secret redaction in Python,...
Real User Monitoring (RUM) Setup with web-vitals
Monitor actual user experiences with Core Web Vitals, session replay, and performance analytics to...
MVC Pattern in Modern Frontend Applications
Apply the Model-View-Controller pattern to React and Vue applications to separate data, UI, and...
Infrastructure as Code Review Template
A template for reviewing Terraform and CloudFormation infrastructure code.
Kubernetes Pod Disruption Budget Template
A template for defining Pod Disruption Budgets to control voluntary disruptions during node drains,...
OpenAI API Guide: Python Examples for Production
Production guide to the OpenAI API: Responses API, chat completions, streaming, function calling,...
Clean Architecture Explained: Layers & Dependency Rule
A practical guide to Uncle Bob's Clean Architecture: organize code into layers so that frameworks,...
Data Pipeline Architecture: Batch, Streaming, Lambda, Kappa
Design batch and streaming data pipelines — working Airflow, Flink and dbt code, Lambda vs Kappa...
ETL Pipelines: Extract, Transform, Load for Data Engineers
A practical guide to ETL pipelines: extracting data from multiple sources, transforming with...
Read Replicas: Scale Reads Without Changing Your App
Production guide to database read replicas: streaming replication setup, read/write routing (app,...
Stream Processing: Event-Driven Data Pipelines with
A practical guide to stream processing: choosing between Kafka Streams, Flink, and Spark Streaming,...
Web Components — Custom Elements, Shadow DOM & Templates
A practical guide to Web Components: creating reusable custom elements, encapsulating styles with...