I have approach a developer who is just finishing graduate school. I told him about my intention of having an arrangement whereas i can pay some cash but also have a potential developer also work for some equity. He has told me how much it would cost to do the fix the bugs and little chinks in the application. He's also indicated that he's open to other offers. How much equity should i offer at this point? Should the equity share be contingent upon performance? Finding a co-founder is really tough... I want to do the right thing.