Build a Vector Search Engine Premium
Design an approximate nearest neighbor search service that indexes 100 million high-dimensional embeddings, answers similarity queries in under 20ms, and supports live index updates without downtime.
Build Amazon's Warehouse Picking Route Optimizer Premium
Design a route optimization system for warehouse pickers that batches orders efficiently, calculates the shortest walking path through a 1M sq ft facility, and adapts routes in real-time as new orders arrive.
Build a WebSocket-Based Presence System Premium
Design an online presence and typing indicator system that tracks 10 million concurrent users, propagates status changes to relevant subscribers in under 200ms, and handles connection drops gracefully.
Build YouTube's View Count System Premium
Design a view counting system that accurately tracks billions of views per day, shows counts that update in near real-time on video pages, and resists inflation from bots and refreshes without blocking the video serve path.