System Design

System design involves creating a detailed blueprint of a system's architecture, components, modules, interfaces, and data to fulfill specific requirements.

System Design•Sep 20, 2026

Why PostgreSQL 19 Is the Most Reverted Release Ever?

PostgreSQL 19 pulled 53+ features during beta, more than any release ever. Here's what got cut, why it happened, and what you should do about your upgrade.

System Design•Sep 17, 2026

How We Chose Between Driver and Mongoose for MongoDB CRUD

We compared the MongoDB Node.js Driver and Mongoose ODM for CRUD operations — full code examples, real trade-offs, and the decision framework we used to choose.

System Design•Aug 24, 2026

How to Design a MongoDB Schema for Optimal Performance

Learn how to design a MongoDB schema for optimal performance. Master embedding vs referencing, avoid unbounded arrays, apply design patterns, and build indexes that scale.

System Design•Aug 20, 2026

How to Debug Your Brain: Fixing Cognitive Distortions in Code

Learn how to debug your brain by spotting 12 cognitive distortions that cause imposter syndrome, bad code reviews, and career anxiety in software developers.

System Design•Aug 16, 2026

MongoDB vs PostgreSQL: Which Database Should You Use in 2026?

MongoDB vs PostgreSQL in 2026, an honest, practical comparison covering performance, pricing, vector search, scaling, and when to use each. Discover why PostgreSQL is the default for most apps and when MongoDB genuinely wins.

System Design•Aug 1, 2026

How to Build a Simple Rate Limiter with Node.js, TypeScript, and Redis (Step-by-Step)

Learn how to build a simple rate limiter with Node.js, TypeScript, and Redis. A beginner-friendly, step-by-step guide to creating scalable and secure APIs.

System Design•Jul 22, 2026

Why Caching Feels Like Magic... Until It Doesn't (A Beginner-Friendly Guide)

Learn what caching is with simple examples and discover why it makes websites incredibly fast. Understand cache hits, cache misses, stale cache, cache invalidation, and the different cache layers used in modern web applications.

System Design•Jul 15, 2026

MongoDB Sharding Sounds Hard Until You See This

A beginner-friendly guide to MongoDB sharding. Learn how shards, shard keys, and horizontal scaling work with practical examples, best practices, and common mistakes to avoid.

System Design•Jul 10, 2026

HTTP QUERY Method Explained: Why RFC 10008 Could Change REST APIs Forever

Learn everything about the new HTTP QUERY method (RFC 10008), why it exists, how it compares to GET and POST, current adoption, .NET and Laravel support, and when you should use it.

System Design•Jun 8, 2026

When a CDN Doesn’t Help: How to Identify Real Performance Gains

Not every website gets faster with a CDN. Discover when CDNs fail to improve performance, how edge caching really works, and how to evaluate real speed gains in modern web development.