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The System Design Cheat Sheet for Product Managers

Two pages. The 12 building blocks, the 8 tradeoffs, and the 5-step framework for PM system-design interviews, written by a PM for PMs. No code.

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  • The 12 building blocks in one line each, plus the one question a PM should ask about every one
  • The 8 tradeoffs that come up in every architecture review, in plain English
  • A 5-step framework for "design the system behind…" and "what breaks at 100×?"
  • 6 questions PMs actually get asked and what the interviewer is really testing
  • 10 questions to ask in your next review so you contribute instead of nodding along

Built by Daniel Digo: 10 years in product, from payments for McDonald's, Nespresso and El Al to AIB's lending app. I failed a system-design round, then built the practice tool I needed.

Daniel Digo · Founder, PMLabs · London