Complete file sharing website

I have started developing a type of file sharing website. I have encountered too many obstacles and would like to have the website completed by a professional. My main points of concern are the quality of code and the security of the website. I need a developer who writes CLEAN and SECURE code. A very general outline of the main features of the site are below: - A user login and registration system (complete with a forgot password feature and a user session system). - A dashboard page which will contain feeds from the database to display useful information to the user (such as files they have uploaded, etc). - A files (briefs) page which will contain a "form upload wizard" and other useful information about the files they have already uploaded. (The form upload wizard is a three step form which allows the user to upload and send one or mulitple files to one or mulitple recipients). - A my account page which will allow the user to set and update their details and site preferences I will briefly explain the file upload process using the form upload wizard. Please see screenshots for a visual guide. 1. They enter a name and an optional description 2. They enter the recipient(s) of the file(s). This is simply their full name and email address. A minimum of one recipient must be added to proceed to step three. 3. They upload the file(s) they wish to send using drag/drop or by clicking the button. The only allowed file types are txt, doc, docx, pdf, zip, rar, 7zip - a security option will need to be added to this step 4. After clicking submit and all of the validation checks are passed, the file(s) should uploaded to that users individual folder and a download link emailed to the recipient(s). 5. When a recipient clicks the download link, they should be taken to the website and presented with the security challenge. If they pass the security challenge then they are able to download the file(s). User registration is optional when downloading a file. My progress so far: - A working login and registration system (will need reviewing - and the forgot password feature isn't complete) - A working form upload wizard (will need tweaking) What I require a developer to do: - Review the existing code and rectify any issues (security, etc) or optimise the code - Tweak the form upload wizard. --- Input validation on step two is not working to my liking (will explain). --- The security option/challenge on step three can be either a password, a pin code or a set of security questions that need to be answered. --- The file(s) need to be uploaded to a separate folder under the users individual folder (so a new folder should be created each time they use the upload wizard). - Complete the "Account" page to allow users to edit their details and update site preferences - Create a "Lock Screen" feature, where a user can lock their session/screen. They can then simply re-enter their password to log back in. - Create detailed history/logging for file uploads and downloads. A user should be able to view who downloads their files (username, time, etc). This project is subject to change and I will more than likely require the developer to assist me in future maintenance of the site. I am looking for a long term relationship.