Contract-First API Design at Shift

Published: 2026-02-20 · 7 min read

Problem we had

Frontend assumptions and backend responses diverged over time, creating hidden rework and brittle integrations.

What changed

We adopted contract artifacts as first-class outputs in CI and used them as a shared source of truth during implementation.

Result

Fewer surprise integration failures and faster onboarding, because newcomers can inspect the contract and understand payload behavior quickly.