for software engineers moving into AI

Crack the AI infra system design round.

Watch real-length mock interviews. Answer before the candidate does.

Try one free → no ML background needed ✓

Design ChatGPT · 11:26

MeiArjun

Mei, the interviewer, asks:

A worker freezes. Another takes over. Then the first one wakes up. What now?

Most prep gives you a write-up.
We give you the interview.

watch

the full interview

questions, wrong turns, recovery

answer

before the candidate

every probe pauses the video

compare

mid · senior · staff

see the bar for your level

The questions changed.

what most prep covers

URL shortener
News feed
Rate limiter
Ticket booking

what AI loops ask

See the bar for your level.

The finished whiteboard from Design ChatGPT

yours to edit ↗

available today · free

Design ChatGPT

coming next to the library +

Less than one hour with a coach.

Free

1 full interview + your first probeTry it free

save 74%Pro · yearly

$79/year

every interview, every probe, every levelGet Pro or $25/month

Lifetime

$199

founding price, foreverGet lifetime

14-day money-back guarantee ✓

Questions

Who is it for?

Software engineers (backend, infra, platform, full-stack) going after AI engineer and AI infrastructure roles, from mid to staff. Each interview is broken down for every level.

Do I need an ML background?

No. These rounds test the distributed system around a model you call as a service: streaming, queues, GPU capacity, caching, retrieval, evals.

Who are Mei and Arjun?

Our interviewer and candidate. Every interview is written by us from candidate reports, reviewed, and produced with AI voices, which is how we ship new problems and every level of each.

Does it renew automatically?

Monthly renews until you cancel. Yearly and lifetime are paid up front. Any plan: full refund within 14 days.