Front End Web and Mobile Developer
Able to take working unstyled web application, android application and iPhone/iOS application to the next level. Working with existing design, wire frames and competitor implementations.
Nice to have: Android XML layout, iOS layout, Subversion
Rough estimate: 10 screens on each platform (web, iOS, android.) As far as possible technologies like HTML5 etc should be used to reduce duplication of work - but it will be unavoidable to some degree.
So 30 screen/pages.