Reference

🔴 P0 — queues are the backbone of async architectures

🔴 P0 — the most fundamental inter-service communication decision

🔴 P0 — the distributed transaction pattern for microservices; critical for Stripe payment flows

🔴 P0 — “There are only two hard things in CS: cache invalidation and naming things”

🔴 P0 — the classical distributed transaction protocol and why it’s limited

🟠 P1 — directly relevant to Stripe (multi-tenant SaaS platform)

🟠 P1 — store events, not state; the append-only log as source of truth

🔴 P0 — the primary tool for read scaling; multiple patterns with different consistency guarantees

🔴 P0 — expected in every system design interview; grounds design decisions in numbers

🟠 P1 — how you evolve public APIs without breaking consumers