Kotlin because it's general purpose and is so elegant. Python is also ok, but i like it only for scripting (I do not like OOP in Python because IMO it's not primarily designed for it). Ruby is IMHO much more elegant, flexible and naturally object-oriented. In terms of usability nothing beats JS though.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.