Web Services For Our XMPP Server

We need an experienced developer to create a few web services for our XMPP server. We need the following services: 1. PHP service which can send the request to server to invite my contacts 2. PHP service that can call every regular interval to update the friends status 3. PHP that can call to add my new user status 4. PHP service to automatically convert user ID into a usable pin The develop will need to develop these services on our XMPP server