System designEarly beta

Design real-world systems

Talk through system design problems like you would in an interview. Get instant feedback on your approach.

Available Problems

medium

Design a Chat Application

Design a real-time chat application that supports both 1-on-1 and group messaging. Focus on real-time delivery, offline support, and state management across multiple chat threads.

Real Time CommunicationBackground SyncPush Notifications30 min

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Design real-world systems

Available Problems

Design a Chat Application

More problems coming

Design a Chat Application