Start with anything that takes you to an MVP fast. You probably will be iterating months with this until your solution needs a re-thinking or pivot: you don't n

Start with anything that takes you to an MVP fast. You probably will be iterating months with this until your solution needs a re-thinking or pivot: you don't need to change your lang right now. It happened to me 3 times the same way: we started with X in a year or 2 we ported to Y. Personally, I would go Ruby or Python, they're pretty much solid, lots of devs around. Then, if you have the need to scale: i loved Erlang, but I like also Go a lot.