I am working as Microsoft Windows developer already for 17 years. I can prepare an accurate offer based on your requirements so I suggest to discuss.
Relevant Skills and Experience
Windows Development: C#/.NET, WPF/XAML, WinForms, WCF, UWP, EF, Linq, MSSQL, MVVM, ASP.NET MVC, C/C++, Java, Delphi
Proposed Milestones
$700 USD - Rough estimation