System Design Sandbox

Interactive system design practice with AI feedback

5 followers

Interactive system design practice with AI feedback

5 followers

System Design Sandbox is the interactive playground for system design interviews. Drag and drop real components (load balancers, caches, Kafka, shards, etc.), build your architecture, and get instant AI feedback that catches missing rate limiters, single points of failure, wrong consistency choices, and more with clear fixes. TinyURL scenario is live and 100% free, no signup. More scenarios drop every week. Stop drawing boxes on Excalidraw. Start practicing the way you think.

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System Design Sandbox

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System Design Sandbox Interactive system design practice with AI feedback

Launched on December 9th, 2025