Stop Writing Types Twice: A Fullstack TypeScript Playbook

If you're building fullstack with JavaScript (React on the front, Node.js on the back, TypeScript across both) you've hit this wall before. You define an interface on the backend. You define the same interface on the frontend. They drift apart. Bugs happen. Nobody notices until production. This post walks through a pipeline where you define your data shape once as a Zod schema on the backend, and every other layer (API docs, frontend types, React Query hooks) is generated from it automatically using Orval . Change the schema, regenerate, and TypeScript tells you exactly what broke. Across the entire stack. No shared packages to publish. No Swagger YAML to maintain by hand. No "hey can you update the frontend types" Slack messages. A quick note: we're still in the process of learning and fully adopting this flow ourselves. We haven't battle-tested every edge case, and our team is still building muscle memory around the workflow. But the early results have been promising enough that I wa