giulianoxt

Android solved that UX issue with Chrome custom tabs (https://developer.chrome.com/multidevice/android/customtabs). It uses a seamless UI exiting the app and everyone uses the up to date browser on the phone.

Great initiative by the Facebook team. Anyone knows if there's a similar framework for Android? (declarative description of the UI, rendering based on immutable models, single data flow, etc)

There's some excellent official documentation on backend writing (http://llvm.org/docs/subsystems.html and http://llvm.org/docs/WritingAnLLVMBackend.html). From my previous experience, it isn't as straightforward as in the docs, but you can use the other backends as reference.