Ace Your System Design
Interview
Stop whiteboarding. Start simulating. Practice system design interviews with timed, scored challenges that mirror real FAANG-level interviews.
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Practice
136 guided scenarios covering distributed systems, microservices, data pipelines, and real-time architectures.
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Timed
Real interview pressure with countdown timers. Build complete architectures in 30-60 minutes, just like the real thing.
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Scored
6-dimension rubric matching FAANG evaluation criteria: architecture, scalability, security, cost, failure handling, governance.
How It Works
1
Pick a scenario
URL shortener, chat system, payment gateway...
2
Build your design
Drag real cloud components onto the canvas
3
Simulate traffic
Watch your system handle load & failures
4
Get your score
Detailed rubric across 6 dimensions
Start Practicing — Free →
No credit card required