Build Facebook Application

I would like a Facebook application built that is a mix between TaskRabbit, Zaarly, ThumbTack, and RedBeacon. So it will need to have similar functionality to these sites, so you must have a good understanding of how those sites work. It will only be a Facebook application though, so people must be facebook users to use the application. The app will not be exactly like the other sites, but will have similar functionality, so I will need someone with those necessary skills to do this project.