System Design Case Studies

Real-world system design problems — URL shortener, rate limiter, notification system, chat app

🚧URL Shortener

System design case study — designing a URL shortening service like bit.ly

System design case study — designing a rate limiting service with token bucket and sliding window algorithms

System design case study — designing a multi-channel notification system (push, SMS, email)

System design case study — designing a real-time chat application with WebSocket and message delivery guarantees