I work on a small team (2 backend devs, 2 frontend). The we are always arguing about the API. The frontend devs want the data for their components pre-formatted in 1 API call. The backend team wants to run a SQL query and return the entire record as JSON.
Likely scenario: backend formats data and moves on / gets busy elsewhere. Frontend changes, so that data is now required in a different format. Frontend decides to just reformat it at their side because of schedules. Now it’s a mess and nobody knows why.
The root of the problem is this stupid frontend/backend team division when it’s actually a single program. That’s where the idea of “let’s ask fullstack” comes from. But there’s no good answer this guy could give you, apart from “stop drawing stupid dividers across the whole”.
That was obviously a really general rule of thumb not intended to be an actual architecture guideline...
Or just use GraphQL-esque methods, but versioning will poke its head in somewhere eventually.