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)
Secrets Rotation Template
A template for scheduling and tracking the rotation of API keys, tokens, and certificates.
Security Audit Checklist Template
A thorough checklist for conducting security audits of applications and infrastructure.
Vendor Risk Assessment Template
A template for evaluating third-party vendor security and operational risks.
API Testing Strategy Template
A template for planning contract tests, integration tests, and load tests for APIs.
Load Test Report Template
A standardized template for documenting load test results and recommendations.
API Gateway Design: Resilience, Routing, and Security
A practical guide to designing API gateways: routing patterns, rate limiting, authentication, circuit breakers, and observability for...
GraphQL vs REST — When to Choose and How to Migrate
A decision guide comparing GraphQL and REST APIs: use cases, performance, caching, tooling, and migration strategies for engineering teams.
gRPC in Microservices — High-Performance RPC Guide
A practical guide to gRPC for microservices: Protocol Buffers, streaming, load balancing, and migration from REST for high-performance RPC.
Message Queues — RabbitMQ, Kafka, and SQS detailed analysis
A thorough guide to message queues: when to use RabbitMQ, Kafka, or SQS. Covers patterns, throughput, ordering, and operational...
Webhook Security — Delivery, Verification, and Protection
A practical guide to securing webhooks: signature verification, replay attack prevention, payload encryption, and endpoint hardening for...
Convert CSV to JSON
How to convert CSV data to JSON format in Python, Java, and JavaScript.
Convert JSON to CSV
How to convert JSON data to CSV format in Python, Java, and JavaScript.
Diff JSON Objects
How to compare two JSON objects and find differences in Python, Java, and JavaScript.
Format Phone Numbers
How to format and validate phone numbers in Python, Java, and JavaScript.
Generate URL Slugs
How to generate clean, URL-friendly slugs from strings in multiple programming languages.
Merge JSON Files
How to merge multiple JSON files into a single object or array in Python, Java, and JavaScript.
Parse Command Line Arguments
How to parse command line arguments in Python, Java, and Node.js CLI applications.
Parse CSV Files
How to parse CSV files in Python, Java, and JavaScript with practical code examples.
Parse Excel Files
How to read and write Excel (.xlsx) files in Python, Java, and JavaScript.
Parse Log Files
How to parse and analyze server log files using Python, Java, and JavaScript.
Parse Markdown Files
How to parse Markdown to HTML and extract structured data in Python, Java, and JavaScript.
Parse PDF Files
How to extract text and metadata from PDF files in Python, Java, and JavaScript.
Parse XML Files
How to parse XML documents in Python, Java, and JavaScript with practical code examples.
Serialize and Deserialize Data
How to serialize and deserialize data in JSON, XML, and YAML across Python, Java, and JavaScript.