I had a similar requirement for a short period and made use of Codenvy. For example I created a linux stack and a project then installed Elixir etc. and made use of their IDE. The free version is not fast, especially to get up and running, but it might be suited to your requirements.
There are lots of pre-built stacks of various compositions, but I preferred to build mine from scratch and I believe they also support use of your IDE locally (should you need it).
Edit: would help if I posted a link: https://codenvy.io
