Phase 5: Real-World Case Studies

Theory is great, but shipping is better. We'll take everything we learned and apply it to build massive scale systems.

The classic interview question. Unique ID generation, redirection, and high read/write ratios.

Real-time communication. WebSockets, message persistence, and unread counters.

Fan-out on write vs fan-out on read. timeline generation and caching strategies.

Quadtrees, Geohashes, and matching drivers to riders in real-time.

Video transcoding, CDN distribution, and adaptive bitrate streaming.