In WOOGA (Berlin) we are always hiring.
We develop social games, have more than 30 Million Monthly Users, and use rails, node, erlang, or whatever is good for the case.
But could be easier if you just look to all the opportunities in: <a href="http://www.wooga.com/jobs/" >http://www.wooga.com/jobs/</a>
40 OPEN POSITONS.