I recommend you look for a quantitative hedge fund to license, trade or finance your systems, or maybe even hire you. Prop shops are possible too. Do be prepared to share performance statistics and address questions about scalability and execution simulation methodology. Some of these questions may be tough or difficult to answer. You should never have to reveal the internal logic of your systems. Our fund deals with so many quant systems, we care less about individual system logic, and more about testing automation, scalability, performance statistics, and the people involved. Meeting with a fund manager in person can be exceptionally important. It is well worth the cost for you to travel to them. In their eyes its a sign of motivation and drive. You'll may also learn a bit about quant systems that the fund has in production, tips you'll never learn from any book or internet resource. An honest fund will be happy to meet with you. But do realize an honest fund will only work with people that are also honest about their systems.
That is on the right track but here is a variation where you expose absolutely nothing of value; Give the programmer your system exactly but with bogus signals. Learn enough of the programming language to be able to modify working code. Let the hired programmer do all the heavy lifting involved in getting the initial code right. Then you can do a little work on it to put your real signals in the code.