Ask HN: What language learn in 2017 to power up my technicals skills?
I'm currently a fullstack javascript developer and in the middle/long term I would like to become a backend only guy. Currently I'm searching a language to replace Node.js.
For now I have this one in mind : Ocaml, Rust, Go and Haskell. (by preference order)
Do you have some advices about this languages ?