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)
Apache Airflow: DAGs, Operators, Scheduling
Master Apache Airflow: DAGs, operators, sensors, XCom, scheduling, backfilling, connections, variables, and production patterns for data...
Data Pipeline Architecture: Batch, Streaming, Lambda, Kappa
Master data pipeline architecture: batch processing, streaming, lambda and kappa patterns, ETL vs ELT, and choosing the right approach for...
Data Quality Guide: Validation, Profiling, Great
Master data quality: validation frameworks, profiling, schema enforcement, anomaly detection, and monitoring with Great Expectations,...
dbt: Models, Tests, Macros, Materializations
Master dbt for data transformations: models, tests, macros, materializations, seeds, snapshots, Jinja templating, and production patterns...
Docker Compose: Multi-Service Local Development
Master Docker Compose for local development: multi-service environments, networking, volumes, profiles, overrides, hot reload, debugging,...
GitHub Actions CI/CD: Workflows, Runners, Secrets
Master GitHub Actions for CI/CD: workflows, reusable workflows, composite actions, secrets management, runners, matrix builds, caching, and...
Helm Charts: Structure, Templating, Dependencies, Registry
Master Helm charts for Kubernetes: chart structure, templating, values, dependencies, hooks, libraries, registry management, and production...
Kubernetes Config Management Guide
Master Kubernetes configuration management: ConfigMaps, Secrets, External Secrets Operator, sealed secrets, env injection, volume mounts,...
Complete Guide to Web Accessibility: WCAG 2.2 Compliance
Master web accessibility with WCAG 2.2: ARIA roles, keyboard navigation, screen reader support, color contrast, focus management, and...
CSS Modern Layout: Grid, Flexbox, Container Queries
Master modern CSS layout: CSS Grid, Flexbox, container queries, subgrid, logical properties, and responsive design patterns without media...
Complete Guide to React Server Components: RSC Architecture
Master React Server Components: RSC architecture, data loading, streaming, server actions, and client component boundaries in Next.js App...
React State Management: Context, Zustand, TanStack Query
Master React state management: Context API, Zustand, Jotai, and TanStack Query for server state. Covers patterns, persistence, optimistic...
Complete Guide to TypeScript Advanced Types
Master TypeScript advanced types: conditional types, mapped types, template literal types, infer, distributive types, and type-level...
Distributed Tracing: OpenTelemetry, Jaeger, Zipkin
Master distributed tracing with OpenTelemetry, Jaeger, and Zipkin. Trace propagation across services, span context, sampling strategies,...
Prometheus and Grafana: Metrics, Dashboards, Alerting
Master Prometheus metrics collection and Grafana dashboards. Covers metric types, PromQL, service instrumentation, alerting rules, and...
Sentry: Error Tracking, Triage, and Resolution
Master Sentry for production error tracking. Covers SDK integration in Python, Node.js, Java, release tracking, source maps, performance...
Structured Logging: JSON Logs, Correlation IDs, Aggregation
Master structured logging with JSON format, correlation IDs, log levels, and aggregation. Covers Python structlog, Node.js pino, Java...
Content Security Policy: CSP Headers, Nonces, Hashes
Master Content Security Policy: CSP directives, nonces, hashes, reporting, strict-dynamic, nonce-based CSP, hash-based CSP, and production...
CORS Security: Origins, Headers, Preflight, Credentials
Master CORS security: same-origin policy, CORS headers, preflight requests, credential handling, common misconfigurations, and production...
Encryption at Rest: AES-256, KMS, Envelope Encryption
Master encryption at rest: AES-256-GCM, key management services, envelope encryption, key rotation, database encryption, field-level...
OAuth2 and OIDC: Authorization Code, PKCE, Token Validation
Master OAuth2 and OpenID Connect for production: authorization code flow with PKCE, token validation, refresh tokens, scopes, JWT...
JUnit 5: Extensions, Parameterized Tests, Dynamic Tests
Master JUnit 5 for modern Java testing: extensions model, parameterized tests, dynamic tests, test interfaces, lifecycle, conditional...
Property-Based Testing Guide
Master property-based testing with Hypothesis (Python), fast-check (TypeScript), and QuickCheck principles. Generate test cases...
Pytest in Production Guide
Master pytest for production codebases: advanced fixtures, plugins, custom markers, parametrized tests, parallel execution with...