Design RoundAce Your Next Frontend System Design Interview
Practice with an AI interviewer that behaves like a senior staff engineer. Draw diagrams, get grilled on trade-offs, and receive detailed scoring — all in a realistic mock interview environment.
Everything you need to prepare
A complete interview simulation environment, not just a chatbot.
AI Interviewer
A senior staff engineer persona that challenges you with realistic frontend system design questions, adapts to your answers, and pushes you deeper.
Interactive Whiteboard
Draw architecture diagrams with Excalidraw, share them with the interviewer, and get feedback on your visual design choices in real time.
Detailed Evaluation
Get scored across 6 dimensions — architecture quality, trade-off analysis, technical depth, communication, scalability thinking, and practical awareness.
Real Interview Mode
Practice under timed conditions with a 45-minute countdown, or use Training mode with no time limit to explore topics at your own pace.
Voice Input
Use speech-to-text to answer questions naturally — just like you would in a real video call interview.
Session History
Review all your past interviews, hiring decisions, and evaluation scores to track your improvement over time.