System design, trade-offs, and war stories from production.
Start a session with Kai →“Your service is at 10× traffic tomorrow. What breaks first, and what do you do tonight?”
Every session ends with a written report scored on these three axes, with the transcript attached so you can see what earned each mark.
Explaining complex systems clearly and concisely, at the right level of abstraction for the question.
Correctness, trade-off reasoning, failure-mode awareness, and concrete specifics (technologies, numbers, latencies).
Owning decisions and incidents ('I' not 'we'), handling disagreement, and team dynamics.