"Perform their duties" -- i.e. wage slave who is actually currently indispensable. A significant portion of the time the situation is actually that they should

"Perform their duties" -- i.e. wage slave who is actually currently indispensable. A significant portion of the time the situation is actually that they should be a cofounder but you are taking advantage of them and treating them like an normal employee. If you want to do that, then you will need to quickly find some more programmers you can take advantage of and have them train up on the code base and domain before the first guy finds a better job or starts his own business. Hopefully he starts a competing business and buries you.