Coders Crushby Napplied AI

System Design Problems

Browse 5 curated problems from top tech companies

Design Slack/Discord
hard
Real-time Systems
Design a real-time messaging platform like Slack or Discord supporting channels, direct messages, file sharing, and presence indicators.
45 min
WebSocketMessage QueuePresenceReal-time
Design Figma/Google Docs
expert
Real-time Systems
Design a real-time collaborative editing system supporting multiple simultaneous editors with conflict resolution.
45 min
CRDTOTReal-time SyncCollaboration
Design Google Docs
hard
Real-time Systems
Design a real-time collaborative document editing system like Google Docs supporting multiple concurrent editors.
60 min
collaborationreal-timeotcrdt
Design WhatsApp/Messenger
medium
Real-time Systems
Design a real-time messaging application like WhatsApp supporting 1:1 chat, group chat, media sharing, and delivery receipts.
45 min
messagingwebsocketreal-timechat
Design Uber/Lyft
medium
Real-time Systems
Design a ride-sharing application like Uber supporting real-time driver matching, location tracking, and fare calculation.
45 min
ride-sharinggeospatialreal-timematching