Pay a huge salary. If you can't afford it, share the profit. Three guys means 33% for each one. So offer 33% of all profits for the next two years, paid monthly

Pay a huge salary. If you can't afford it, share the profit. Three guys means 33% for each one. So offer 33% of all profits for the next two years, paid monthly or when the company gets money. It's expensive, but you keep your equity. Offer less, and nobody will be interested. The offer must be compelling. Nobody likes cheap nitpickers. After a year or so you can also figure out if this new developer should be an equity owner. Or if paying him for work is enough.