Engineering,
but with adrenaline.
A live incident simulator for data engineers. Real systems, real bills, real SLO clocks — recompiled from outage post-mortems and dropped onto your pager. One free sim every month; replays last forever.
It's 09:00. The Airflow UI is a wall of yellow — ~600 tasks queued across four teams, almost nothing running. Workers show single-digit CPU. The scheduler heartbeat is healthy. Nobody deployed anything. It looks like the whole platform is broken and idle at the same time, and three teams are already in your DMs asking why their morning loads haven't started.
Not a tutorial. A diagnosis loop on a clock.
Every sim runs the same four-phase loop the best on-call engineers run in their head. Skip a phase, get graded down. Trip a red herring, lose the clock.
Hunt clues in the right component.
You're handed a topology and a brief. Open the components you think matter. Wrong probes burn time. Wrong layers burn red herrings against your grade.
- Pick component → run probe → inspect output
- Evidence chips accumulate at the bottom
- 4 clues per sim · 1 right answer per layer
The stakes aren't theoretical.
They're the bills you've actually paid.
Every scenario is recompiled from a real outage post-mortem. Same systems, same metrics, same root causes — we change the names so the lawyers stay calm.
Every Monday, a new ticket.
Last Monday of the month — free for everyone.
One free simulation every month.
Unlock the rest for the price of one bad query.
A new drop every Monday. The last drop of the month is free for everyone, no card. Annual saves ~50%. Cancel anytime, replays last forever.