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)
Complete Guide to Kubernetes Ingress
Configure and troubleshoot Kubernetes Ingress controllers. Covers NGINX Ingress, TLS, path routing, annotations, IngressClass, and common...
Complete Guide to Terraform Modules
Build reusable Terraform modules with proper structure, inputs, outputs, and versioning. Covers module composition, testing, and registry...
Complete Guide to Mobile Responsive Design
Build responsive layouts that work on every device. Covers CSS Grid, Flexbox, container queries, fluid typography, mobile-first...
Complete Guide to React Performance Optimization
Optimize React apps for speed. Covers memoization, virtualization, code splitting, bundle analysis, React Profiler, concurrent features,...
Complete Guide to AWS Cost Optimization
Reduce AWS cloud spend by 40%. Covers EC2 right-sizing, Spot instances, Reserved Instances, Savings Plans, S3 lifecycle, RDS optimization,...
Complete Guide to Observability with the Grafana Stack
Set up metrics, logs, and traces with Grafana, Prometheus, Loki, and Tempo. Covers instrumentation, dashboards, alerting, and distributed...
Complete Guide to Web Security Headers
Implement CSP, HSTS, X-Frame-Options, and secure headers. Covers content security policy, CORS, referrer policy, permissions policy, and...
Sentiment Analysis with Python and NLTK
Score text sentiment using NLTK VADER and custom lexicons in Python.
Generate PDF Reports with Python
Create styled PDF documents from data using ReportLab and fpdf2 in Python.
Merge JSON Files in JavaScript
Combine multiple JSON files with conflict resolution strategies using Node.js.
Parse CSV Files with Python and Pandas
How to read, filter, and transform large CSV files efficiently using Python pandas and the csv module.
Read and Write Excel Files with Python
How to read, write, and format Excel spreadsheets using openpyxl and pandas in Python.
Generate QR Codes with Python
Create QR codes for URLs, text, and contact cards using the qrcode library in Python.
Backup Rotation Script in Bash
Automated backup with retention policies using bash and find.
Monitor Disk Usage with Bash
Alert when disk space crosses thresholds with bash scripts
Log Rotation and Compression in Bash
Rotate and compress application logs automatically with bash scripts
Run Shell Commands in Parallel with Bash
Execute multiple shell commands concurrently using xargs, GNU parallel, and background jobs.
Batch Resize Images with Python
How to bulk resize and optimize images using Pillow and Python for web delivery.
Safely Extract Zip Files with Python
How to extract and validate zip archives securely using Python zipfile and shutil.
Configure iptables Firewall Rules with Bash
Set up basic firewall rules with iptables and bash scripts
Find and Remove Duplicate Rows in SQL
Detect duplicate records in SQL tables using GROUP BY and HAVING, then remove them safely while keeping the canonical row.
Set Up Full-Text Search Indexes
Configure full-text search indexes in PostgreSQL to query large text columns with ranking, stemming, and highlighting.