You're looking for someone who 1) knows how write [good] code; 2) knows how to run a business; 3) believes in you; 4) believes in your product; and 5) will donate his time for equity.
I suggest you find friends to volunteer and help with segments of the code and shaping the product. If you can't get them interested in contributing, you can't get people interested in purchasing the software.
Once you have a viable product, you'll need to obtain revenues. Revenue will give confirmation to the idea and your abilities to make a product and make money. Revenues will attract business people.