System Design Sandbox – Interactive system design practice with AI feedback

Summary: System Design Sandbox is an interactive tool for building system architectures using drag-and-drop components and receiving instant AI feedback on design flaws such as missing rate limiters and single points of failure. It currently offers a live TinyURL scenario with more added weekly, requiring no signup.

What it does

Users construct system designs by placing components like load balancers, caches, and shards on a canvas. The AI analyzes the architecture in real time, identifying issues and suggesting fixes.

Who it's for

Engineers preparing for system design interviews or practicing architectural trade-offs benefit from this tool.

Why it matters

It addresses the lack of immediate, actionable feedback in traditional system design practice, helping users improve their designs efficiently.