Reference

🔴 P0 — critical for payment systems, Stripe’s public API design is built on this

🟠 P1 — decouple deployment from release; essential for large systems

🔴 P0 — the holy grail of distributed message processing; critical for payments

🔴 P0 — the foundational impossibility result and its more nuanced successor

🟠 P1 — solves the “one API doesn’t fit all clients” problem

🔴 P0 — the craft of designing APIs; shows engineering judgement, not just pattern knowledge

🟠 P1 — the foundational framework for observability

🔴 P0 — appears in nearly every system design interview

🔴 P0 — DDIA Ch4 core content; underpins the gRPC proxy pattern and API versioning

🟠 P1 — how to push updates to many recipients; classic interview problem