Amazon has a policy that they own all the code you write unless you get it signed off by them as a project that is not related to ANY of their businesses. With

Amazon has a policy that they own all the code you write unless you get it signed off by them as a project that is not related to ANY of their businesses. With Amazon being in so many businesses, they will almost certainly deny whatever idea you want to work on because they have something they claim is related. He could still do it but that is risky as he could get sued later and I have even heard that it can block any future sale until it gets ironed out.