Here's our stack, I like it a lot and I feel like its fairly progressive without being too hip-for-hipness-sake: Android: Java -> Kotlin iOS: ObjC -> Swift W

Here's our stack, I like it a lot and I feel like its fairly progressive without being too hip-for-hipness-sake: Android: Java -> Kotlin iOS: ObjC -> Swift Web App: React + Coffee -> React + ES6 (Backbone models) Website: React/ES6/Redux/Babel/Webpack with server rendering Backend: Clojure at the core; Python for heavy number crunching