White Room

An AI coach that knows when to raise the bar.

Give it your target role, context, and deadline. It builds the roadmap, changes the difficulty, and remembers the mistakes you keep making.

Role-aware roadmap
Persistent memory

Preview White Room

Etched AI · two-week sprint

Your next session is ready. Take the speculative decoding lesson, then the queue problem on a night with the full 90 minutes.

the Etched onsite moved up to next Friday. what changes?

I compressed the serving loop around the signal they care about: speculative decoding tonight, the lock-free queue tomorrow, and system design on Saturday. Quantization is optional now, and the final rehearsal stays 48 hours before the onsite.

Start training inWhite Room.

Preview White Room

Choose your WhiteBox plan.

Take DSA Premium for the practice loop and unlimited resume reviews, or Ultra Premium for the whole prep system with the coach. Open any plan to see the screens you are buying.

Free

$0 /mo

Everything WhiteBox has to offer for free.

48 original implementation problems in the Core Catalog
912 curated DSA problems in the algorithm roadmaps
1,900+ quiz questions across algorithms and domain knowledge
Algorithm roadmaps that map out what to learn next
Interview intel from real candidates, free forever
Daily quests, streaks, and the global leaderboard
Tsuki AI chat for hints and explanations
36 in-depth guides and writeups, always free
Progress that persists across every session

DSA Premium

$0 /mo

Billed annually at $79. Save 27%.

One lunch to get the full DSA improvement loop.

Everything in Free
Adaptive DSA practice: a hand of unseen problems picked for your level
Problems pulled from AtCoder, CSES, Codeforces, LeetCode, USACO, and oj.uz
Solve history, rolling difficulty, and per-topic weak spots
A weekly check-in that re-aims the next block of practice
A shared learner profile with inspectable practice evidence
Judge sync, so solves you make elsewhere still count
Unlimited AI resume reviews