It's really awesome to see that Elixir is actually being used in the "real world". Do you mind sharing how you guys started using it? Did you start from scratch or were you an erlang shop prior to using Elixir?

there's a game company called undead labs that uses Elixir in production (per https://www.youtube.com/watch?v=iSTspCGn8C8 )

Here is a list of companies who are currently using Elixir in production: https://github.com/doomspork/elixir-companies

One of their guys had a great talk at ElixirConf 2015: http://confreaks.tv/videos/elixirconf2015-into-production

We started right away from scratch on Elixir. No Erlang before, just Ruby and some other "best tools for the job". It's pretty cool to be able to select whatever technology fits what you want to achieve.