I know something about this.
Were I you, and again, no lawyer, just an average software guy, I would develop my own thing and sell it on my own.
However, having said that, does this company offer you an SDK you can use to develop your product with?
They might have an entire program you can be part of and they will help you make money.
Not knowing what you are really doing, it's difficult for me to really say. However, I've written tons of different software that used SDK's from other companies. Many times, they have programs you can become a part of and then you all make money!