I need a Webbased software for uploading and storing PDF / Excel / Powerpoint / Word files

I am looking for an experienced programmer who can built a webbased software for me. I already have all the mockups, it just needs to be programmed. The default language of the application should be in Dutch. I will provide you with an English briefing/mockups and with Dutch translations. In a nutshell: it will be an application where the admin can upload files (Pdf, Excel, Powerpoint or Word). He can make them downloadable OR he can give them the status 'on request'. Users can login in the web application and they can look up files and download them directly or request them if they are not available for download. If user requests a file, then the Admin should receive an email saying which file was requested by which user. Admin Functionalities: - Admin must be able to upload Excel files, Word files and Powerpoint files - Admin must be able to create categories (up to three levels) - Admin must be able to assign the uploaded file into a category - Admin must be able to look up (search functionality), edit and/ or delete the uploaded files - Admin must be able to edit / delete categories and change the order of the categories - Admin must be able to manually create users who has access to the site - They do not need to sign up automatically! - Admin must be able to edit user details or delete user - Admin must be able to manage 4 language versions of the site. So if he uploads a file for the Dutch Language version of the site, he also has the be able to upload the corresponding French, English and German files. - Admin must be able to see detailed statistics of the users (daily / weekly / monthly / yearly): who logged in, who logged out, what did they download, which file did they request - Admin must be able to receive an email if a specific file was requested by a user. User functionalities - User must be able to login (system should be able to automatically store his login credentials) - User must be able to search for a file (by browsing through the categories or by using the search box) - User must be able to download a file or to request a file - User must be able to select language version of the site Requirements: - Do NOT bit if you require upfront payments. I will set milestones, but they will ONLY be released when project is finished! Do not worry, I'm an honest person. Check my positive feedback. - Please provide me with the technologies you will use for this project and also what support you will give upon completion of project - I need at least 1 week to test the software before finishing the project - software and database must be hacker-safe