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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.

Learn with Ada, your AI coding mentor — ask questions or tap I’m stuck in any lesson for a nudge without spoilers.

Advanced12 lessons~14h
First lesson free

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Course content

Foundations

  • ○Advanced Interview PlaybookFree30 min

Consistency & inventory

  • 🔒Design Ticket / Seat Booking50 min
  • 🔒Design a Payments Ledger50 min

Realtime collaboration

  • 🔒Design Collaborative Documents50 min
  • 🔒Design Multiplayer Matchmaking45 min

Platform primitives

  • 🔒Design a Webhook Delivery Platform45 min
  • 🔒Design a Feature Flag System40 min
  • 🔒Design Edge Config / KV45 min

Data & intelligence

  • 🔒Design a Metrics / Observability Pipeline45 min
  • 🔒Design an LLM Inference Platform50 min
  • 🔒Design a Real-Time Ad Auction50 min

Capstone

  • 🔒Design a Stay Marketplace (Airbnb-lite)55 min