Sir,
we live in liquid times where nothing is solid, and IT knowledge is not even liquid but gas, it evaporates as it changes quickly.
Liquid societies require complex way of thinking, capable of moving knowledge that is pertinent in a given context (this is more of the philosophy from Edgar Morin). In this case my computational experience and my roots in electronicssystem engineering where I coded in assembly language and c++ i can take quickly to learn xamarin and push notifications if you want me to. I can learn anything as I am an smart guy.
If we can allocate sometime so that I can pick up this I can finish this project for you. :)
Let me know, this would be like a joint venture as they like to call when private and public entities invest. :)
Best regards!
Sergio