Voip Application

We are looking for Voip developer who can develop Voip Application which will be integrated with our Student Management System. The application will be integrated with FreeSWITCH which is already installed on our another server. What this application with do is as follows 1)_ Outgoing and Incoming Call facility. 2)- Call history with Recordings. 3)- Click2Call facility; so our agent should be able to call any phone number from our application. This will pick up the phone number from the database, it's not like Click2Call of Skype in which it's plugin is installed in the browser. 4)- Integrate any Voip Provider to use it's services. 5)- Automatic Calls based on some rules defined by us.