Prove Your Architecture.

Practice real-world system design challenges, get instant AI-powered feedback, track your progress with an Elo rating, and build a verified portfolio that speaks for itself.

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How It Works

Design. Evaluate. Improve.

A purpose-built platform that replaces messy whiteboarding with structured challenges, instant AI feedback, and a ranking system that tracks real progress.

Real-World Challenges: Tackle curated system design scenarios — from URL shorteners to global payment systems. Each challenge tests scalability, reliability, and trade-off thinking.
Interactive Diagramming: Drag-and-drop infrastructure components on an infinite canvas. Connect services, databases, caches, and queues with a professional-grade editor.
Instant AI Feedback: Submit your solution and receive a detailed evaluation in seconds. Discover bottlenecks, single points of failure, and security gaps — with actionable suggestions.
Elo Rating & Portfolio: Every evaluation updates your Elo rating. Build a public portfolio of high-scoring solutions, earn achievement badges, and rise on the global leaderboard.

Built for serious practice

EloCompetitive Rating System

AIInstant Evaluations

∞Infinite Canvas Editor

3Languages Supported