Hi,
I have over 2 years of enterprise experience developing complex solutions in Xamarin including iPad, iPhone, Android and WinPhone platform. I have developed 3 n-tier solutions using Xamarin platform, one of them used native iOS and two Xamarin Forms. At this moment I develop mostly in Xamarin Forms for our solutions and WCF (SOAP and REST) to communicate with other components of our system. As a Technical Leader I am responsible for all core aspects of mobile projects in my company. I deal with many Xamarin problems every day, doing all my best to support for my team colleagues, so I am pretty sure I can help you with your issues.
Best regards