(Elixir/Phoenix || Node.js/Meteor || Ruby/Rails) && (Angular.js, React, Homegrown JS frontend stuff), as well as desktop stuff with JS (my "lib": https://github.com/Anonyfox/node-webkit-hipster-seed ) from time to time. Actually I'm fluent in many languages so the concrete choice doesn't matter really as long as it is suitable for the given problem. But today there is no question where the answer would be PHP. Especially when the future is "soft" realtime, distributed and high performant or for tiny devices, problems you can't throw more hardware/caches at.