tRPC (TypeScript Remote Procedure Call) gives you:

• Type inference across client and server. You change a field name on the server, the client breaks at compile time. It’s a developer’s dream (or a lazy dev’s dream, depending on your vantage).
• No code generation. You don’t have to write a separate REST or GraphQL schema, then generate client types. It’s all in code, courtesy of TypeScript and tRPC’s power.
• Less boilerplate (compared to typical “API schema + server + client” combos).

Overall, tRPC transforms that painful “Oops, the server changed that field from name to fullName and we forgot to update the client” scenario into an immediate compile-time error. It’s like having a friendly, hyper-vigilant coworker who never sleeps.

Project Structure

A typical approach is a “monorepo” style with:

root/
 ┣ server/
 ┗ client/

We’ll put our Express-based tRPC backend in server/, and any client code in client/. They’ll share types so we get that sweet end-to-end type safety.