I'm a long time Erlang programmer and still prefer Erlang. But anyone who asks about web programming I point to Phoenix. So if you are doing a web app, or have a web component, I'd suggest Elixir and Phoenix for that part :)

Erlang developer tooling does need work. But we are getting there, we have a new build tool http://www.rebar3.org/ that also combines forces with Elixir for the package management https://github.com/hexpm/rebar3_hex