Certain improvements for custom PHP site (PHP, SQL, GoogleCloud file handling, SECURITY)

We have custom made client portal for our partners. Main futures currently: - HTTPS - Admin backend for our staff and client sites for our clients. Username and password needed to log in. - Can upload files (PDF documents) for our clients (by our admin staff), files are stored on our GoogleCloud server and send out a notification, which includes links to the newly uploaded files - Clients can log in and see list of all the uploaded files and the sent email notifications - Clients can change password - Design is responsive Improvements we need: - Password recovery - Additional user role, who can see more clients files and notification. Shown client's details should be set up by our admin team. - Registration form (after registration account is deactivated, need to be activated by our staff) - Add subscription handling, which handles payment period, and warns user if it is close to run out of paid period and also blocks login, after period ran out. - When viewing uploaded files (PDF) on google cloud, we need a HTML header, which shows several details (payment period, client name, upload date, etc...). Currently it only shows the PDF itself. - Additional bug fixes and minor improvements Hungarian speaking developer would be preferred, but it is no problem if we can talk English. :) Thanks, Matthew