Backend: Java (phasing out), Go (phasing in), Postgres, Redis, all on Ubuntu EC2's.

Frontend: JS (TypeScript/ES6), React, ReactNative, SASS, all Webpack'ed (except RN).

I think it's a fairly light stack but am happy with it. I would use this as the starting point for pretty much every project.

I love Go, but always feel it is not very productive for web app backends. What about you ? Do you use an ORM w/ Go?

In my opinion, it's great for web app backends as well. The net/http library suffices.

Just that you might need a library for routing like https://github.com/julienschmidt/httprouter