wernerdweight

I would go with Go if you need performance or solve highly concurrent tasks. If not, Node feels easier to work with and is arguably more common (also, it's JS - it's everywhere, and you can switch to FE more quickly since you want to focus on web apps). Python is cool as well, but I hate how the package management is not solved, and the pythonic coding standards are not excellent, in my opinion, of course. As for stability (in terms of their APIs), I guess Go is the safest choice (it's still v1, after all), Python is a close second, and Node changes relatively fast. It's also a question of what language(s) you already know and use.