Unless they have a ton of the product already built, I agree with everyone here - you're a founder. If they had a product up and running or even with customers

Unless they have a ton of the product already built, I agree with everyone here - you're a founder. If they had a product up and running or even with customers, then you have to give some consideration. The "idea" itself is worthless. Its all about the execution - and as a no-salary, techie - its going to be your job to help that happen.