I need a professional UI/UX to create a neat kivy frontend

we need a good UI/UX designer who can help us to improve our app interface ( a article reader app written in python kivy lib)
most the back end logic were done, you just need to help us for recreating a nice interface. let it be super user friendly and decent looking, like amazon kindle for example. And pakage it to .exe / apk / ipa file

the current code is attached below