Xamarin and iOS(Swift) developer needed for Mobile App changes -- 2

A startup business with social network application (Wo Wonder) having Web and Mobile App channels, is about to be launched. The web version has been updated and now I need to have the Mobile App changes (customization) in synch with the web version. The developer to create the API and back end web side is in place and standby if needed. I need someone who will customize both android (coded in Xamarin) and iOS (coded in swift) scripts.

I prefer paying on hourly basis but I am flexible once the developer understand the requirement and advises otherwise.

This task should not exceed a few days to complete. However if I like the developer I will retain for maintenance on permanent basis.