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Master System Design Interviews with AI

Mock system design interviews where AI asks you hard follow-ups, just like a real interviewer and gives instant analysis at the end.

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Everything you need to ace system design interviews

Practice end-to-end: discuss trade-offs with an AI interviewer and draw production-grade system diagrams on an interactive canvas.

Great start! I notice you've chosen a microservices architecture. What's your strategy for handling data consistency across services?

I'd use eventual consistency with event sourcing for most operations...

Excellent! How would you handle the CAP theorem trade-offs in your payment service?

AI is analyzing your architecture...
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Get intelligent, contextual questions based on your system design. Our AI analyzes your architecture and asks follow-ups like a senior interviewer. Receive instant critique and next-step guidance after every answer. Start practicing for free today.
  • Realistic back-and-forth conversations
  • Actionable critique on trade-offs and bottlenecks
  • Tailored follow-up questions to deepen your reasoning
Interactive Design Canvas
Draw systems on a familiar canvas. Create professional diagrams, annotate assumptions, and iterate quickly with real-time AI feedback on capacity planning, consistency, and fault tolerance. All included in your free practice.
  • Drag-and-drop components and connectors
  • View session history and the feedback
  • Receive feedback directly on your canvas
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The most realistic interview practice available

Unlike static previously asked questions, our AI conducts dynamic conversations that adapt to your responses

Dynamic AI Conversations

Real follow-up questions based on your specific design choices, not pre-scripted responses

Instant Analysis

Get immediate feedback on trade-offs, bottlenecks, and improvements - no waiting for human reviewers

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Company-Specific Questions

Practice with questions styled after real interviews from Google, Meta, Amazon, and other top companies

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