My fear for you is that the more you outsource to "get things going", the less likely a capable founder would want to hop on.

Unless you are paying an extreme premium (and you're beyond swimming in investor cash), odds are your system started as a technical nightmare, and is only becoming moreso by the day. As a dev I would be extremely hesitant of hopping on board anything with such a questionable technical past, especially if the product momentum is too high to make a total rework possible.