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System Design Interview
AI interview partner
Launch-ready SaaS

Practice system design with an AI interviewer that grades, diagrams, and pushes back.

Get daily questions, instant scoring, and Gemini-powered diagrams so you can walk into interviews with clarity and confidence.

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Mermaid + Excalidraw diagrams
Daily practice quotas
Practice history
Today's promptAI feedback
Design a real-time ride-sharing dispatch system with surge pricing.
Score: 8/10 · Missing: regional failover, rate limiting
Mermaid diagram generated · graph TB

See the interview flow in action

A quick walkthrough of the practice workspace, diagrams, and scoring.

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AI interviewer with real scoring

Strict rubrics and deep-dive questions so you know what to improve next.

Instant diagrams from Gemini

Generate Mermaid diagrams or draw your own architecture live.

History + progress tracking

Save every attempt, compare scores, and refine your approach.

Pricing built for daily practice

Choose a plan for daily practice, team prep, and unlimited history.

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