I've started to use TypeScript and React on the front end, with a JSON RPC middleware on an express server with helpers that automatically implement service interfaces for API calls, action creators and reducer handlers. And all of them are type-safe.

I've spent a lot of time building CRUD APIs and GraphQL interfaces, and this is the simplest solution that has saved me so much development time. JSON RPC gets so much hate, but it's made my life so much simpler.