APP LIKE KIK Needs server expert to integrate xmpp on current php server

APP LIKE KIK Needs server expert to integrate xmpp on current php server We have a chat app like KIK and we are looking for a server expert who can integrate XMPP on our current PHP server. We have already web service managing user profiles(photos, info, etc) and want to integrate messaging functionalities. We are planning to integrate XMPP. We have already made mobile messaging application based on php and mysql and this is very slow and inefficient, because we are current checking and getting messages by sending http request to server continuously, we know that we have to convert our whole system to SOCKET based, but we have no idea where to start. We are trying to make it fast and real time responsive like KIK App. In your proposal, please explain 1. how much experience you have integrating XMPP 2. If you have ever used XMPP for real time messaging APP Thanks!