How come it’s so hard to find Software Engineers?

Basically, me and my team are actively building a dating app through a tech company and are not technical at all besides one partner and have a very big need for someone that is open to partnering, equally motivated as us and knows code.

How did your company find the people that were a huge necessity?!

EDIT: We are currently building the MVP right now with a 3rd party vendor and are not looking for a partner that does a ton of work for free. We just are having trouble finding developers all together that are open to the idea of taking on a new venture and partnering.

Basically just asking other startups how they found their missing team members