Creating App Like Blackberry Messenger without Chat Feature

We are looking for motivated and responsible developers to create a mobile application that runs on Android, iPhone, and BlackBerry. Personal and professional skills: * Responsible: must demonstrate the highest standards of professional responsibility and commitment. * Communication: good communication skill, advanced English (speak fluently, read, and write), Skype conference call and chat, regular status updates via Skype and email. Technical skills: * Android, iOS, BlackBerry technologies Unique Technical skills: * Generating and Scanning QR Codes As our first step in filtering and hiring our freelancers, please answer the questions below and assume this as an interview question. Before you answer the questions below, please send us your portfolio for credibility. We are looking for potential freelancers to work on our project. We expect to hire 7-10 professional freelancers. As you submit, please start off with the expected rate/hr. We will be filtering our freelancers with the quality and accuracy of their answers, English skills, project costs and responsiveness in our emails (we will send an email to you after we grade your answer). Responsiveness communication and skilled programmers are what we look for, and is the essence of our filter. We plan to launch our product by late March. Our project is expected to cost between $2000-$3000. But we are committed to pay $5000. If we hire you, the minimum payment you will earn is around $100-$250, but we are very selective in hiring our freelancers. If you are faster than others in developing your project, we expect you can earn about $600. So get ready, you will be competing against other genius freelancers out there. Our CTO will be your project manager. Our CTO will split the task into very small projects. With around $200 each project (25 projects), and the freelancer that finishes their project fast will get the next project. So how many project can you get done for this product? Send us an email of your answers. We want to fully launch our product by March 1st - so we got no time to waste. QUESTIONS: Imagine you are assigned to create an a mobile application similar to Blackberry Messenger (but without the chat feature) for Android, iOS, and BlackBerry phones. Some of the features include: 1) Account creation 2) QR-code Scanning 3) QR-code Generator 4) Add contacts via username 5) Contact request and acceptance 5) Sort contacts into groups 6) Detect the current location of client 7) Menu features 8) Subscription account/payment 9) File upload to backend 10) Search for a user in the whole system 11) Custom privacy settings a) What technology/framework will you use? Do you choose to use the native SDK for each mobile OS or use some existing cross-platform mobile app development tool (if so, which one)? Explain why. b) What technology do you use on middleware and backend (data management, storage, and retrieval)? c) Any other technology you would use that is not mentioned in a) or b)? d) Tell me about your experience with mobile cloud communication (if you have any). What technology did you use? e) Tell me your experience with one or more of these. Examples of previous work will be great. 1) Creating visuals (buttons and UI widgets) 2) Gesture-based interface 3) UX flow 4) Other user interface or design PLEASE SUBMIT YOUR ANSWERS TO OUR EMAIL: [Contact details removed by Freelancer.com Administrators which breaches the site Terms and Conditions] Allow us about 2-3 days to assess all the answers, and we will respond to you, and we will set up the project via Freelancer.com, [login to view URL], [login to view URL] (we will adjust to your preference).