expertReal System Design Problems

Design a distributed job scheduler that avoids duplicate execution across multiple instances.

Tests whether you know a naive cron-per-instance setup breaks the moment you scale beyond one node.

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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