Every data incident, rebuilt as a timed challenge.
Real production outages — cloud-bill blowups, broken pipelines, latency drift — recompiled from post-mortems into hands-on sims. Open any one to read the problem and the systems involved, then diagnose it on the clock against expert keys.
2 challenges · 2 live · one free sim every month
four phase
The $516k Gap
Friday, 08:47. Finance Slack just pinged: the Q2 revenue tile on the CFO Looker dashboard reads $4.21M, but the ERP reconciliation says $3.69M. Six days of refunds appear to have vanished somewhere between Postgres and the boardroom. The CEO walks into the board room at 09:00.
The Small-Files Tax
It's 06:47. Finance Slack pinged overnight: analytics GCS bill jumped 4× last week, breaking the quarterly budget. No outages, no paging. Dashboards still render. Board prep starts at 08:00. You're on call.
Ready to take the pager?
One free simulation every month, no card. Replays last forever.