Server to Host Photos from our Camera App

Need to have an AWS server set up with API to pass photos thru when our users hit "sync" in our camera app. We need to have separate accounts for each of our users, and separate files for each "account"/Inspection that they take photos of, and we will need to pass permission to view to specific files to specific people after that. We will need to pass the permission to companies that will have different levels of authority to view and or edit the photo sections. There will be multiple different companies that will have access to the server files. Each company will only be able to have any access to the files that are tagged to their company specifcally- Each company will have Top level admin and next level that will have access to all file uploads related to their company. Then managers will have access to all files in their company that are tagged to them or any of the employees under them and each employee will have access on a file by file basis if and when the file gets tagged to them Link to our camera app: [login to view URL]