Custom development on existing page (not open for bidding)

This project is not for bidding, freelancer has already been selected. The current application is a PWA so all the changes must refresh local/browser cache which will then be shown on UI. Do not show on UI by direct fetch from API. Scope: 1. Allow user to register - Ask for mobile no only (popup existing, changes needed) - Verify OTP (build the OTP service, tables, UI) - If mobile exists, log in the user - If mobile does not exist, create user and log them in 2. Users can add or update sessions - Logged in user can view list of their sessions (UI HTML exists, make it dynamic, API/refreshing local cache/tables to be added) - Logged in user can add another session (form/API/refreshing local cache to be added) - Logged in user can modify details of existing session or delete session (form/API/refreshing local cache to be added) - User gets notification 1 day before session and 1 hour before session (use service like [login to view URL], API integration) 3. Payments - Logged in user can view current balance on profile page (HTML exists, make dynamic using API/refreshing local cache) - Logged in user can add money via InstaMojo to their current balance (integration with instamojo, update balance in our table, show in transactions list on UI) - When a session is completed, money is deducted from wallet (HTML exists, make it dynamic using API/refreshing local cache, logic for deduction to be created) - When money is deducted, user is notified - User can see last 3 transactions 4. Session Feedback - Logged in user can see list of their last sessions (HTML exists, make dynamic using API/refreshing local cache) - Logged in user can see feedback given as well as sessions where they can give feedback (HTML exists, make dynamic using API/refreshing local cache) - Logged in user gets a reminder immediately after session to give feedback - If feedback not given, logged in user gets reminder to give feedback the next day