Asterisk Database (Calling Cards)

I am a Us company that has a Asterisk Calling Card Business and need a database to manage incoming calls and outcoming calls .The bottom line is that we are looking for a freelancer that is willing to do free freelance installments that will include either our asterisk system database and At the end of each week each one of the programmers will actually be compensated with $270 every week for 4 weeks. Please let me know if you are interested .The Asterisk program will just include a database that will be used to manipulate and dial multiple lines for a calling card business. We already have feedback ready and [login to view URL] me for more details.