intermediateReal System Design Problems

Design a real-time chat system like WhatsApp.

Tests whether you can design delivery guarantees, message ordering, and real-time connections at massive scale. Asked at: Meta, Google, Uber

Ready to design this system end to end?

Generate a complete, structured system design answer — requirements, capacity estimation, API design, architecture, database choice, scaling, caching, fault tolerance, security, trade-offs, and more, walked through the way a strong senior engineer would in a real interview.

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