It just isn't. You're allowed to make products that compete with products already on the market, even if you've worked for the company making that product. Unle

It just isn't. You're allowed to make products that compete with products already on the market, even if you've worked for the company making that product. Unless there's specific IP that was stolen, I don't see how this is in any way unethical or shady. They hired you to develop that product, and you did. Nowhere in that contract is anything saying you can never use what you learned elsewhere. They'd need to pay you significantly more than what they paid you (which they won't). And there are great reasons why non-competes are basically invalid in most places.