I've full stack Xamarin developer and serving in all patterns of Xamarin since the year 2013.
I'm Proficient to develop xamarin app in all patterns:
Using [login to view URL] with MVVM (Prism Also)
Using MvvmCross wiFlere
Answering your requirements step by step:
1. ASP.NET MVC:
We are Microsoft GOLD Partner organization with a certified developers with proven experience on ASP.NET MVC 5, Entity FrFlere
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