What kind of development do you do?

I am curious to hear what kinds of development people do. There has been a big spike in web development over the years and that is what I do. I work mainly in front-end development working with JavaScript and React. In my free time I am working on learning Elixir and Phoenix as well as ReasonML and ReasonReact. I am really interested in functional programming languages and paradigms. What languages, tools, and frameworks, is everyone using?