Hello.I know i'm a new freelancer here. But i have at least 6 years of expériences as developper.
I master java development, JEE and web technology as HTML5, JAVASCRIPT, CSS3, JQUERY,
EXTJS, SENCHA TOUCH, JQUERY MOBILE, for web applications and mobile applications using CORDOVA or PHONEGAP. Cordova or Phonegap allows to develop native mobile application for android, ios, blackberry, windows phone, ...etc.
If you allow me to develop your solution, i will use cordova and sencha touch (a powerful js framework for mobile application) to develop the client for android and ios. The client will communicate with the JEE Server throught secure AJAX request.