Hi! we can make this happen for you.
For this kind of projects, besides the Xamarin App, we create a WEB API + SQL Server Database, that we usually recommended to be hosted in Microsoft Azure. Starting price for Microsoft Azure is only 7 USD/Month.
We do the WEB API with the latest tools, meaning ASP.NET Core 2.2 (Visual Studio 2019)
We sign NDAs and IP Agreements, and deliver full source code.
We do a minimum of 2 progress video per week, usually on Wednesdays and Sundays, so you will be always aware of what is going on, if the hire is for 8 hours a day, we can do a daily progress video.
We work with weekly payments, and you get the full source code every week
You can test us the first week if you don't think we are the right team, no problem you can move to another one
We have more than 60 projects done with 100% of completion, and in all of them we have been rated 5 stars
We are Microsoft Registered Partners,
Thanks!
Felice,