I am a frontend javascript developer from Moscow. I am totally Linux user and also spent 5 years working as backends developer (PHP, Ruby, Golang).
For now, I prefer to code with next stack:
Javascript (7 years of experience)
ES6 via babel
Angular 1.X (1.5 years of experience)
Webpack
LESS (or any other CSS transpiler)
Bootstrap
Going to move to Angular2 and Typescript (familiar but didn't use on production so far).
Feel free to contact with any questions.