Need Xamarine Android Developer who has also great knowledge of Web Sockets.

Hi Freelancers I am looking for an expert Mobile app developer who can embed an existing messenger (build using web socket technology) into a xamarine app and in an iOS app (swift). So you must have knowledge of web sockets, Xamarine, and iOS development. I need it to be done asap. Please provide your exact quote and details of your experience and expertise in your proposal. Write NodeJS on the top of the proposal so that I can see that you have read the details. Developers who are new, please stay away from this project as this is only for the experts, who have a great experience with various technologies. Please provide exact time frame and reasonable cost. Don't put a dummy cost in the bid and then ask for more in the discussion.