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Practice system design interviews with a realistic AI interviewer. Get instant feedback, scoring, and a hiring recommendation — available 24/7.
Pick from our curated system design problems used at top tech companies.
Your AI interviewer introduces themselves and presents the problem.
Use the whiteboard canvas and chat to walk through your design.
Real system design problems from top tech company interviews
System Design
Start a mock interview in seconds, any time of day.
Each problem has a unique AI interviewer with a distinct style and focus.
Draw diagrams, boxes, and arrows — just like a real interview.
Get scored on clarity, coverage, and structure with a hiring recommendation.
Receive a detailed evaluation with scores, hiring decision, and actionable improvements.
Distributed Systems
System Design
System Design
See which key concepts you covered and which you missed.
Real interview time pressure — sessions auto-end when time runs out.