UX/UI design for POS app

I am looking for talented mobile UI designer to designer from basic sketches done in paint to finial designs of the app in PSD. Design requirements: 1) all elements must be in golden ratio. 2) we develop in react native, so for all element designs you must use components style from available react native components like "React Native Elements", NativeBase etc.. 3) real experience in user friendly usable UI design Attached is our app layouts and functionally description, follow it to create the screen designs for both mobile and tablets screen! The final result should be delivered in figma