First version of the distribution API was a Go microservice. But that microservice is now deprecated and its replacement was rolled into the main Rails app. That microservice streamed large files (so I went with Go), but I nixed the streaming and Go was no longer needed.
Have you contemplated making the backend open source or at least source-available ("Look but don't touch", you may only use the hosted service, etc)? Would love to take a look at the implementation
The CLI is also written in Go.