For Engineers
100+ curated problems. Real voice + whiteboard AI interviews. Honest feedback. Track your progress from L4 to Staff.
Not a quiz. Not a chatbot. You speak, draw, and think in real time — just like the actual interview. The AI listens, watches your whiteboard, and pushes back when you miss something.
Every session is scored across 5 dimensions with a seniority verdict. See yourself move from L4 to L5 over weeks. Identify exactly which dimension is holding you back.
Problems tagged by company (Google, Meta, Amazon, Uber, Stripe) and difficulty. Prep specifically for your target company and role. Know what's coming before you walk in.
Skill Progression
After every session you get a full breakdown: what you got right, what you missed, and a seniority verdict. Track your scores over time. Watch the gaps close.
Session 1 · Design URL Shortener
Session 4 · Design a Rate Limiter
Session 9 · Design Twitter Feed
Your token bucket handles single-node traffic well. |
Coming Soon
RoadmapRank against engineers globally by seniority tier. See where you stand at L5 or Staff.
Live system design challenges with real-time scoring. Compete, improve, get noticed.
Curated problem sequences for each seniority jump. L4 → L5, L5 → Staff, and beyond.
Problem Library
Problems tagged by company and difficulty (Easy → Expert). Used by engineers to prep and by teams to screen — the same problems, two different perspectives.
Seniority Calibration
Set your target level and practice at the right depth. The AI automatically calibrates its rubric — L3 through Principal.
Sample questions by level
"Walk me through what a load balancer does before we scale this."
"You've mentioned sharding. What's your strategy for hot partitions?"
"At 10M writes/day, your single Postgres node is a problem. How do you migrate with zero downtime?"
"Other teams depend on this API. How do you version it while rolling out the new schema?"
"The board wants 5-nines. Walk me through your runbook if the primary region fails during peak."