Master system design interviews with interactive diagrams, AI-powered evaluations, and peer review. Land senior engineering roles at Google, Meta, Amazon, and more.
A full system design question takes 45 minutes and a blank canvas. A drill takes one minute. You get a working architecture with exactly one thing wrong with it — find the flaw, fix it, and watch the traffic start flowing.
Unique features that competitors don't offer - interactive diagrams, AI feedback, and peer review
Create system architecture diagrams with our integrated Excalidraw editor. Most platforms only offer text - we let you visualize designs professionally.
Get instant, detailed feedback on your system design solutions. Our AI analyzes your approach and provides actionable improvements.
Learn from experienced engineers through community-driven peer reviews. Get real feedback from professionals who've passed these interviews.
Track your progress and compete with others on our skill-based leaderboards.
Practice with a wide variety of system design questions from easy to expert level.
Submit answers as text, diagrams, or screenshots. Express your ideas in the format that works best.
Join engineers who've improved their system design scores and landed roles at Google, Meta, Amazon, and other top tech companies