DrawLint.aiFor developers, by developers
DrawLint.ai
Draw your design, defend your tradeoffs, get a hire signal — before your real interview.
Watch DrawLint in 30 seconds
From blank canvas to AI review — the full flow.
How It Works
Design
Sketch your architecture on an interactive whiteboard with system design templates and components.
Review
Six specialized AI reviewers analyze your NFRs, entities, capacity, APIs, and HLD — then a Lead Reviewer gives your hire signal.
Respond
Explain your tradeoffs verbally — just like in a real interview. The AI rechecks your hire signal based on your responses.
The Review Pipeline
Watch five specialized reviewers analyze your design in parallel, then defend your choices and get an updated verdict.
Why DrawLint
Multi-Level Review
Choose from Mid, Senior, Staff, or Deep analysis — each calibrated to a different experience level.
6 AI Reviewers
5 section reviewers + 1 Lead Reviewer work in parallel for accurate, focused feedback on every dimension.
Privacy First
Your API keys stay in your browser. We never store or log credentials. Post designs under a generated pseudonym for full anonymity — verified by our publicly available codebase.
Weekly Challenge
New system design problem every week. Compete on the leaderboard, build your streak, and practice under real interview pressure.
Learn Workbook & Cheatsheet
A free, beginner-friendly workbook covering Fundamentals, Building Blocks, and all 27 design patterns — plus a scannable cheatsheet. Tracks your reading progress across devices.
Daily Drills
A fresh AI-generated 5-question quiz every day across all 27 patterns. Learn from explanations, build a streak, and climb daily + all-time leaderboards.
Ready to find the holes in your design?
Join engineers practicing system design with AI-powered reviews. Free to start.
Try a Free Review