Ask HN: What have you been using Go for?

Since picking up Go, it kind of feels like I rediscovered programming after ~10 years of banging my head against a wall. I realize Go isn't the first language to emphasize concurrency , but coming from a C & Python background, it just works for me.

That said, I picked up the language outside of industry (I'm on an "advanced degree sabbatical" from finance), so while I have a dozen different use cases relevant to my old gig in trading, I haven't really used it in a production setting to solve any real problem.

So, community of HN Go-nuts, what is the most awesome production application that you've implemented in Go? Has it changed your business/process/capabilities?