On the developer side, you need to be knowledgeable with programming and not that ultra-fine. You need to have that experience which you were able to work for some projects before related to crypto development or not. Those experiences that can at least show case that you know the idea and have background in development. As I understand your questions, developers are only following the plan. There's more to being a developer and that involves those people with the plan to make their own cryptocurrency with goals of what they wanna do with what they are developing.