Develop webapp with Play! framework + integrate FB/G+ etc..

I'm looking for a developer who can work a few/flexible hours/week on fixed hourly rate. The app is built upon Play! framework, which is basically Java + Hibernate + Template engine. You should at least have experience with the first two, but experience with Play! itself would be great. Also experience with integrating to Facebook is a requirement (OAuth etc). Also Google+ and OpenId experience are very welcome. There is no project description. Tasks will consist of building functionality step by step. Being experienced with XML is also a requirement because of importing datafeeds that are in XML. Communication will be in English through messenger or e-mail.