PHP Software / Script Architectural - repost

I am searching for professional software developer to build me an advertising platform which is powers multiple online advertising and networking means. it takes only professional to get this done so i need only serious bidders. More than half of the job is done already, all im looking for is to add some more funtionalities to the already developed script. Funtions like Traffic Exchange PTC E.T.C I will chat with interested persons on this.