Comment by muhmi

Have a look at Erlang and OTP framework which makes it really easy to compose your application of smaller applications. At least for learning.

Communication between nodes is transparent on the language level, its all message passing between processes.

There is a approachable language with great tooling on top of the Erlang VM [1] and a great web framework [2].

[1] http://elixir-lang.org [2] http://www.phoenixframework.org