You should actually try learning a bit about your options for building the product and test the viability of your idea. Landing pages, click through rates, email signups etc.. These are the things that would pique a devs interest. There are a million and one ideas, more ideas than developers, the difference would be made when you show the numbers and show you know exactly what you want... But hey, I'm just saying.. after all you should already know this, you are a business man
Also: There are many other great communities for finding developers. Hint: Developers share a lot of things in common. That said, check out Devcenter.