Backend developer for a website with multi user module

Hi, I have a new requirement For frontend, I will clone a medical tourism website I want to integrate backend on firebase/etc. Frontend is a website for medical tourism that allows international patients to submit their medical records and book a doctor consultation call slot via google meet (and allows the Indian patients to only book a doctor consultation and attend it via google meet ending at receiving the doctor's prescription/ consultation note) and Basis medical procedure in consultation note, International patient is recommended medical packages from onboarded hospitals (details cost and other details). The data displayed on customer/ patient portal will either be static or flow dynamically from separate modules of doctor (call time slot, prescription/ consultation note), randomly generated unique google meet link and recommended hospital packages (data originating from hospital module)