Elixir
Adopt
Elixir is a modern functional language that relies on the erlang virtual machine, with a syntax that resembles the ruby one. It fully embraces the fallibility of software development, by providing a framework (OTP) that has the ability to deal with failures (and recover from them) as the most prominent design choice.
It’s a dynamically typed language (without function overloading) that is a great compromise for fast prototyping. There are a lot of open-source libraries available with mixed quality.