Write the failure modes before the happy path
Integration designs that only document success responses leave on-call engineers guessing when partners time out or send duplicates.
Field Notes
Guides and field notes from live integration and backend design work.
Short articles drawn from OakCore engagements — not generic productivity advice. Topics stay close to API contracts, cutovers, and service boundaries.
Service boundaries that survive a second marketplace
Stuffing every marketplace field into one order service feels fast until the second channel arrives. Boundary decisions need a second customer in mind.
Webhook ownership: one inbox, one team
Shared webhook endpoints without a named owner become everyone’s problem and nobody’s priority when signatures fail at 2 a.m.