P1

🟠 P1 — the accounting pattern underlying every financial system

🟠 P1 — Command Query Responsibility Segregation; separate read and write models

🟠 P1 — underrated staff-level signal; how to change schemas on a live system

🟠 P1 — the durability mechanism underlying every serious database

🟠 P1 — decoupling internal gRPC from external REST via a stateless proxy

🟠 P1 — understanding HTTP/2 is essential for gRPC; WebSocket vs SSE comes up in real-time designs

🟠 P1 — following a request across service boundaries

🟠 P1 — systematic approaches to choosing what to measure

🟠 P1 — Dynamo-style replication; no single leader, quorum-based

🟠 P1 — DDIA Ch3 deep knowledge; shows understanding of storage engine internals