Spring IO 2015 finished yesterday in Barcelona. @ilopmar talk "Mum, I want to be a Groovy full-stack developer" illustrates how to build a complete solution just with Groovy. It shows how to use groovy to develop the backend, web front end, testing, build and even an Android app.
We are developing an Android app in our company. We are going yet wtih Java for Android. Shame on me :-(