DJ mac/iphone system

My plan is to build a application on the Mac where the controller can post functions and allocate a DJ to parties and functions. the view will need to be calendar based and it must be pushed to the DJ's via notification system. also i will need someone to develop a corresponding iPhone app which DJ's will receive notifications as well as further information such location and client information etc. further details would be explained on contact as it is very difficult to explain in writing. i would need a developer that is familiar with objective C and cocoa and knows how to working well with the mac and an iPhone. please contract me for further details. thank you