Xamarin / cross platform developer for fixed price project

We would like to create a native application for Windows WPF / iOS that will import HTML as the front end UI according to a strict specification. The HTML should be rendered as Native UI and not WebView in both iOS and Windows WPF. We have a more detailed specification including front end example we are happy to share with you to get your feedback. Here is the highlevel description: Possible tech stack : Xamarin Milestone 1: Import HTML UI from server into Xamarin app and create a simple Flow for the MVP. Step 1 - make the HTML for these four pages (1024x600 pixels): i) Startpage with one button “Sign up” (.mp4 video background) - any design you like ii) Enter mobile nr iii) Terms and conditions iv) Thank you page (back to startpage) Step 2: The application will understand and the convert HTML into Native UI in both: a) Windows WPF (Windows XP embedded, Windows 7 , Windows 8.1, Windows 10) And b) iOS Step 3: Make the keypad a seperate element so in the future we can have a database of 10 different keypads to choose from. Limitations: We can write different instructions to the creator of HTML for iOS vs Windows so it fits our needs if those have to be different. We can also limit designs to not include animations and this is something we can develop ourselves and support in future Milestone. Included in this Milestone is also to improve the Required Page Structure specification where needed. Most likely logic to keypads will be part of the application. But design, button sizes, font and font size should all come from HTML. We will test in: - Windows XP embedded machine (1 GB RAM) - we can provide you remote access to test on one device like this -Windows 7, Windows 8.1 Desktop, Windows 10 Desktop - latest iOS on iPad (9.7”) - Integrate into Windows Qt application - Samsung Android Tab S 10”