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)
Node.js Caching with Redis: Cache-Aside and TTL Patterns
Cache API responses in Node.js with Redis using cache-aside and TTL patterns
Docker Compose Dev/Prod Split: Separate Environments
Separate development and production Docker Compose configs with overrides
Docker Health Check Configuration for Container Reliability
Add proper health checks to Docker containers with HEALTHCHECK
Scan Docker Images for CVEs with Trivy and Grype
Scan Docker images for vulnerabilities before deployment using Trivy and Grype. Covers CI...
Centralize Container Logs with Fluentd and Docker
Collect, filter, and forward Docker container logs to Elasticsearch, S3, or stdout using Fluentd as...
Docker Multi-Stage Build Optimization for Smaller Images
Reduce Docker image size with multi-stage builds and proper layering
Docker Secrets Management Without Hardcoding Credentials
Inject secrets into containers using Docker secrets, env files, and external secret managers...
Clean Git Commit History with Interactive Rebase
Squash, reorder, edit, and split commits with git rebase interactive. Covers pick, squash, fixup,...
a Custom Terraform Provider with Python and
Extend Terraform with a custom provider using Python and the terraform-plugin-framework to manage...
JavaScript Drag and Drop File Upload with HTML5 API
Implement native HTML5 drag and drop file upload in JavaScript
Node.js File Upload Validation: Type, Size, and Content
Validate file uploads in Node.js with multer for type, size, and content
Stream Process Large Files in Node.js Without Memory Issues
Process GB-sized files in Node.js using streams. Covers readline, transform streams, pipeline,...
JavaScript Clipboard Copy and Paste
Copy text to clipboard programmatically in JavaScript with fallback
JavaScript Infinite Scroll Pagination with
Implement scroll-based data loading in JavaScript with IntersectionObserver
JavaScript LocalStorage with TTL Expiration
Store data with TTL expiration in browser localStorage
JavaScript Service Worker Offline Caching for PWA
Cache assets for offline PWA support with Service Workers and Cache API
Custom GraphQL Scalar Types for Dates, Emails, and JSON
Define custom GraphQL scalars for Date, Email, URL, and JSON fields with serialization, parsing,...
Batch and Cache Database Queries with GraphQL DataLoader
Use DataLoader to coalesce individual load requests into batched database calls, solving the N+1...
Structured GraphQL Errors with Extension Codes
Implement structured error handling in GraphQL with custom error classes, extension codes, and...
Set Up a GraphQL Federation Gateway with Apollo
Compose multiple GraphQL services into a single federated supergraph using Apollo Federation and a...
Validate and Sanitize GraphQL Input Types Server-Side
Implement centralized input validation in GraphQL using custom validation functions, Zod schemas,...
Detect and Fix N+1 Queries in GraphQL Resolvers
Identify N+1 query problems in GraphQL resolvers using logging, DataLoader, and query analysis...
Real-Time Data with GraphQL WebSocket Subscriptions
Implement GraphQL subscriptions over WebSockets with Apollo Server and PubSub for real-time updates...
Configure HTTP Security Headers with Helmet in Node.js
Set security HTTP headers in Express apps with Helmet — CSP, HSTS, X-Frame-Options,...