I'm curious as to why Go was chosen for the UI? I have zero interest in starting a language war, no Rust vs Go nonsense. I'm also not questioning the appropriateness of Go.
I'm interested in what language attributes made it attractive or was it simply you already have the people and you can get to work immediately?
I'm speaking from experience where I have had to pick a tool set for service development (purely back-end) but skipped over obvious choices because of a lack of people ready to go. I've personally never done full stack work in any serious way, and have zero interest in such things. Front end development is an unpleasentness I'm happy to leave to others. :)