Backend & APIs

Designing and running server-side systems — REST and GraphQL APIs, data modeling, authentication, and reliable request handling.

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Backend & APIs CORS Errors: How to Read the Message and Fix the Right Thing

A diagnostic walkthrough for CORS failures — what the browser is actually refusing to do, how to map each erro...

Aug 01, 2026

Backend & APIs API Design Best Practices for Reliable Backends

The API design best practices that make an API predictable and safe to change: consistent naming, honest statu...

Jul 16, 2026

Backend & APIs Idempotency Keys: How to Make API Requests Safe to Retry

A dropped response makes the client retry — and now you've charged the twice. Here's how idempotency keys let...

Jul 14, 2026

Backend & APIs REST vs GraphQL: How to Choose the Right API Style

REST and Graph QL both build APIs, but one leans on HTTP caching and simplicity while the other lets clients f...

Jul 03, 2026

Backend & APIs How CAPTCHA-Solving APIs Work — and How to Wire One Into Your App

A CAPTCHA-solving API turns an unfakeable challenge token into an async job your code can orchestrate. Here's...

Jun 23, 2026

Backend & APIs Database Connection Pool Exhaustion: Why Your App Stalls Under Load and How to Fix It

Why database connection pools run dry under load, why adding app servers makes it worse, and how to size pools...

Jun 23, 2026

Backend & APIs REST API Design: A Practical Guide for Building APIs That Last

A pragmatic, vendor-neutral guide to designing REST APIs developers actually enjoy using — resources, status c...

Jun 18, 2026