Data exchange and storage mobile app for cross platform use

Hi, We are looking for someone to take a completed graphic design and software requirements through to a finished package. The application is data transfer and storage based and requires transfer of information through multiple methods between mobile devices of any type. Applicants must be confident with both iOs and Android and how to utilise the data transfer mechanisms and device specific features of both. We are open as to how the app itself is built and in what language but applicants must be able to show previous completed experience in that language. All refered experience must be accompanied with proof of involvement of that project! Further details will be discussed in private with potential applicants along with examples of work with desired functionality. The project would be separated into two sections with the first milestone payment (small) being dependant upon the succesful applicant providing a detailed plan of action specifying exactly how they plan to achieve the required functionality. Subsequent milestones would be evenly spread with the final payment being made after the finished project is recieved and checked. Please feel free to contact me for more information. Ross