Can someone create an app that generates nicknames based on the username?
If you are wanting to hire someone to help with your idea, I would recommend posting this here.
The Need Help section is more geared towards specific problems that you need help solving.
If you’d like suggestions on how to build an app that does that, then this is the right place (I’d just word your question a little more specific so the community can best answer)
Hope you get the help you require!