volume control mac application developer needed asap

Hi, we need a developer to develop an application, we have a designer already, but we need a programmer to develop it. This is an application to rn on the mac, which will allow control of volume 3-5 programs running on the mac through the application's User Interface. We are also looking forward to expand our team in this section, so we might keep you around after the job ends. Only serious bidders are welcome.