I also use GWT on a project I'm working on, except the back end is a combination of nginx, nodejs, and postgresql, so I don't get the luxury of coding everythin

I also use GWT on a project I'm working on, except the back end is a combination of nginx, nodejs, and postgresql, so I don't get the luxury of coding everything in the same language. However, so far I've found GWT pretty great to work in as it gives you the discipline of java while letting you easily write client side code.