React Native design and development

This is something similar to Uber, so I want you to design both passenger and driver application. This is a start-up backed by an ex-employee of Microsoft and he plans to hire if the design stands to be good enough. I need you to design it and structure the existing application. There's not much to be done but just make the look and feel more intuitive. Breaking it into milestones: 1. You'll have to build the ap first 2. Refactor the code in a proper structure(right now the app is just one file) 3. Come up with a UI design