CI/CD with GitHub Actions: A Pipeline That Actually Catches Bugs
Build a practical GitHub Actions pipeline from scratch — linting, tests, caching, matrix builds, and safe deploys — with the gotchas that waste an afternoon if you don't know them.
Articles by Krishna Agarwal
Environment Variables and Secrets: Stop Leaking Your Keys
A practical guide to managing configuration and secrets across local, CI, and production — .env files, the twelve-factor approach, secret managers, and the mistakes that leak keys to GitHub.
Docker for Developers: A Practical Guide to Containerization
Master Docker fundamentals with hands-on examples. Learn containers, images, volumes, networking, and Docker Compose for local development and production deployment.
Getting Started with Astro: The Modern Static Site Generator
Learn how to build lightning-fast websites with Astro, a modern static site generator that ships zero JavaScript by default.
TypeScript Best Practices: Writing Type-Safe, Maintainable Code
Master TypeScript with practical patterns for types, interfaces, generics, and error handling. Learn to write code that's both type-safe and readable.
Zero-Downtime Deployments: Shipping Without the Maintenance Page
How to deploy new code without dropping requests — health checks, rolling and blue-green strategies, backward-compatible migrations, and the database changes that quietly break everything.
Effective Debugging: A Method, Not a Guessing Game
Debugging is a repeatable process, not luck. Learn the scientific method for bugs, debugger techniques beyond print statements, binary search, and how to fix the class of bug instead of the instance.
React Performance Optimization: Practical Techniques That Actually Work
Identify and fix React performance bottlenecks. Learn useMemo, useCallback, code splitting, virtualization, and profiling techniques with real-world examples.
Git Workflow Best Practices: From Solo Dev to Team Collaboration
Master Git with practical workflows, branching strategies, commit conventions, and collaboration patterns. Learn GitFlow, GitHub Flow, and trunk-based development.
Testing with Vitest: From Zero to a Test Suite You Trust
A practical guide to testing JavaScript and TypeScript with Vitest — unit tests, mocking, async testing, coverage, and how to write tests that catch regressions instead of just inflating a number.
Code Review That Works: Catching Bugs Without Crushing Morale
How to give and receive code reviews that actually improve the codebase and the team — what to look for, what to ignore, how to phrase feedback, and how to keep reviews fast.
PostgreSQL for Developers: From Basics to Advanced Queries
Master PostgreSQL with practical examples covering schema design, complex queries, indexes, JSON support, and performance optimization for production applications.
Building a Scalable REST API with Node.js and Express
Learn how to build a production-ready REST API with Node.js, Express, and PostgreSQL. Covers authentication, validation, error handling, and best practices.
Redis Caching Strategies: Speed Without the Stale-Data Traps
A practical guide to caching with Redis — cache-aside, TTLs, invalidation, the thundering herd problem, and how to avoid serving users data that's quietly wrong.
Web Security Essentials Every Developer Must Know
Protect your web applications from common vulnerabilities. Learn about XSS, CSRF, SQL injection, authentication, and security best practices with code examples.
Authentication: Sessions vs JWT, and When Each One Bites You
A clear-eyed comparison of session-based and token-based authentication — how each works, the real security tradeoffs, the logout problem with JWTs, and how to choose without cargo-culting.
Modern Responsive Design: Beyond Media Queries
Master responsive web design with modern CSS techniques including container queries, fluid typography, CSS Grid, aspect ratios, and mobile-first patterns.
Web Accessibility Fundamentals: Building for Everyone
A practical introduction to web accessibility — semantic HTML, keyboard navigation, ARIA done right, color contrast, and how to test. The changes that help real users and happen to help your SEO too.
Core Web Vitals Explained: Measuring What Users Actually Feel
A practical breakdown of LCP, INP, and CLS — what each metric measures, the common causes of bad scores, and concrete fixes. Plus how field data differs from lab data and why it matters.
Logging and Observability: Knowing What Your App Is Doing in Production
Structured logging, log levels, the three pillars of observability, and how to debug production issues you can't reproduce — without drowning in noise or leaking sensitive data.
Background Jobs and Queues: Doing Work Outside the Request
Why slow work doesn't belong in a web request, how job queues fix it, and the hard parts nobody warns you about — retries, idempotency, dead letters, and the at-least-once delivery trap.
Mastering CSS Grid: A Complete Guide to Modern Layouts
Deep dive into CSS Grid Layout with practical examples. Learn to build responsive, complex layouts without frameworks using modern CSS Grid techniques.
How to Read an Unfamiliar Codebase Without Getting Lost
Joining a new project or diving into open source? A systematic approach to understanding code you didn't write — where to start, how to trace execution, and how to build a mental map fast.
Command-Line Productivity: The Shell Skills That Compound
The terminal fundamentals that pay back every day — pipes and composition, finding files and text fast, history tricks, and the handful of modern tools worth installing. Practical, not exhaustive.
API Design That Ages Well: Versioning, Pagination, and Errors
The API design decisions you can't easily undo — URL structure, pagination that survives large datasets, consistent errors, and versioning strategies that don't break every client.