Specifically, I'm interested in how do you coordinate frontend and backend engineers when building a single feature.
For example, your backend engineers are building new Firebase Cloud Function, what's the process of making sure that the frontend engineers can test this function?
Do you keep a separate environment where all dev functions are deployed? From what I was reading on Firebase docs, it seems that I have to create a completely separate project for this. Plus the frontend engineers have to keep a set of function endpoints for dev and separate set of function endpoints for production. It's just seem like too much of a hassle.