System Design - distributed-systems

Rate Limiting Algorithms with Redis

A practical breakdown of three rate limiting algorithms - Fixed Window, Sliding Window, and Token Bucket - with plain-language explanations, Redis-backed Node.js implementations, and a trade-off comparison to help you pick the right one.

redis distributed-systems api-design backend security

Designing a URL Shortener

A deep dive into designing a scalable URL shortening service like bit.ly - covering hashing strategies, storage, redirection, and analytics.

distributed-systems databases api-design