I think sharing a bit of the technical side would help attract the people you're looking for. For example, sharing your technology stack would attract the people familiar with that stack.

Also, if you share a block diagram of your process, even without going too much into details in case you're worried to be copied at this stage or something.

Something like a box receiving a message, and another box processing the message and sending it to a "partner", that gives an idea on how this machine works might help. Heck it can help people think more abstractly and propose ideas to generalize that solution to address a different vertical than the one you're addressing right now.

Maybe build an API so that other companies might use your service and you could add to your references on your website. By the way, this could increase your revenue, avoid the "white-label" situation, increase your credibility and attract technical talent.

In other words, treating this request as a product/sale and removing friction to attract people's minds to the idea/concept would be beneficial.