Integrations of JSSIP in CRM Project

Hi, We are looking for a developer who can work with us on JSSIP library ([login to view URL]) These are the features that we want to implement on our project: 1) Conference call with recording 2) Forwarding Call 3) Transferring Call 4) Recording of every call and save into database 5) Some UI improvements Developer must have knowledge of SIP phone, have worked on JSSIP library integrations. Our backend is in ASP.NET for saving call records into database MSSQL