* Golang for something CPU-bound, small apis that should be really really performant * Elixir/Phoenix for mostly everything else, including REST APIs, regular

* Golang for something CPU-bound, small apis that should be really really performant * Elixir/Phoenix for mostly everything else, including REST APIs, regular web-apps, various chats, backends for games, mobile apps. How? It should be easy and fast to write some functionality, easy to add functionality on late phases of development, it should be "secure by default" (e.g. autoescaping untrusted input, cross-site-scripting protection on by default), fast enough for your task (usually all the langs fast enough but 10x is 10x :) (rails vs phoenix)). You'd also want to check for specific requirements of your target architecture (e.g. processing video, websockets)