It looks like you're looking for workers to excute your plan. For that reason, you need money to hire someone in order do execute the job. To get money, you need people to invest in your company and they only invest in a team of at least 2 people.

So you're only looking for a cofounder in order to unlock some VC money and get the job done. I don't think your setup is a receipe for success. I've seen that configuration so many times and it usually doesn't lead to any good outcome.

Plus, you're competing with all the other startups or wannabe startups in order to hire a developer (for free).

You will have to lower your bar and go back to square one. Since I'm assuming you're not generating any money, all you have is 4 pending contracts, no funds and no product? Is that accurate? If so, forget about the contracts and look for a friend(developer) that'll partner with you on this idea. Make it sound like a solid 50/50 split. You better do it at the very beginning to build a solid team.