WPF, Xamarin Mac and Xamarin iOS (iPad) programmers wanted for cross platform project

The project is a finance application which runs across three platforms, Windows, macOS and iOS (iPad only). The application architecture is designed for maximum code re-use and portability between the platforms but some platform specific code does exist. On Windows this is the WPF presentation layer. On macOS this is the presentation layer delivered by Xamarin Mac. On iPad this is the presentation layer delivered by Xamarin iOS. Programmers are wanted for each of these layers. For WPF the project requirements are to provide maintenance of the existing code base. For iPad the project requirements are to provide maintenance of the existing code base. For macOS the project requirements are to create a completely fresh version of the presentation layer based on the functionality of the existing WPF layer. IMPORTANT. When responding you should provide details of which platform you are applying. You must have SIGNIFICANT skills on the platforms for which you are applying and several years experience. Wannabe programmers are not wanted. There is no time to learn on the job. You will need to provide screenshots of applications that you have delivered or your bid WILL NOT BE CONSIDERED. YOU MUST also provide details of your development environment as follows: All work will be completed using Visual Studio 2017 (for all platforms). You must confirm you are already working using this tool. For iPad and macOS you must have REAL hardware to test your work. Simulation testing will not be accepted. You must confirm this. Candidates will be chosen based on experience. Work will be offered in fixed price bundles. You should indicate your hourly rate expectation and this will be taken into account during review of your bid.