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.
Category
Backend & Data
APIs, databases, authentication, and the server-side systems that power applications.
7 articles
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.
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.
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.