Xamarin Delivery Driver App

I need to develop a driver's App for my delivery software. I only need the driver's app. I need it developed using Xamarin forms. We will develop the backend and provide you with the necessary APIs and documentation. We will also provide templates for the design with assets you can use, but you will have to work the final design. At this time the app will be Android only and it must be developed using Xamarin forms. We also require the un unencrypted source code plus all the documentation. I am attaching a very simple flowchart of what is required. if interested I can provide more info.