An AI interviewer that runs real production scenarios for Senior, Lead and Staff data engineers. It probes, pushes back and calibrates to your level — like a principal engineer across the table.
Free during beta. No credit card.
Your daily revenue table is correct at 6 AM. By noon, finance says yesterday's numbers changed. Nothing failed. Walk me through what you check first.
I'd check whether upstream events arrived after the batch window, and whether our merge is idempotent on reprocessing…
Good. Say it is late data — 3% of events, up to 48 hours late. Finance wants numbers that never change after publishing. What do you trade off?
Not a question bank. Each session is a live scenario that branches on what you say.
Senior, Lead or Staff. Pipelines, data modeling, platform design, incidents — choose what you're preparing for.
Broken SLAs, cost blow-ups, schema drift, migrations. The interviewer follows up, adds constraints and pushes on weak spots.
A rubric-based debrief: what landed, what a stronger answer at your target level looks like, and what to practice next.
Generic AI quizzes you on definitions. Real senior interviews test judgment under messy constraints.
| Generic AI practice | Vamayo |
|---|---|
| "Explain the difference between a data lake and a warehouse." | "Your lakehouse costs doubled last month. Find out why and decide what to cut." |
| Accepts any plausible answer | Follows up, adds constraints, asks "what breaks?" |
| Same bar for everyone | Calibrated to Senior, Lead or Staff expectations |
| Vague "great answer!" feedback | Rubric scoring on diagnosis, trade-offs, communication and ownership |
If you've been paged for a pipeline at 2 AM, argued about partitioning strategy, or justified a platform migration to leadership — this is for you.
Data engineers targeting Senior, Lead or Staff roles. We'll expand to more roles and interview types after the beta.
The beta is text-only. Voice comes later, once the scenarios and feedback are right.
The beta is free. In return, we'll ask for honest feedback after your sessions.
We're onboarding in small batches so we can talk to every early user. Join the waitlist and we'll email you when your spot opens.
Your session transcripts are used to give you feedback and to improve scenarios. We don't sell your data, and you can ask us to delete it at any time.
Limited beta spots. Tell us where you're headed and we'll match you to the right scenarios.
Join the waitlist