System Design Dojo II

Harder boards. Messier tradeoffs. Interviewer energy turned up.

Level up from classic URL-shortener territory into the systems that actually keep staff engineers awake: seat holds, money ledgers, collaborative editing, multi-region writes, webhooks at scale, edge config, LLM inference, and marketplaces. Same loop — diagram, AI critique, survive the follow-up — but the failure modes are sharper.