Designer. He will design the layout and the modules that will bring the interfaces concepts to life, cultivating customers and brands. They know how an beauty interface can sell and retain more costumers.
but here we go: I think the way that UX name is applied is wrong. UX is not a concern of one team or one person. The client support cares about the User Experience. The dev and the Product Owner cares about it too. UX is not an exclusive name to a exclusive type of people in a project. All people involved in a project is an UX.