Appointment Scheduler QR CODE for Multiple business entity for their customers

We are looking forward for a developer for an App ( IOS and Android) for appointment scheduling as per below requirements 1) Registration of business entity – a business house will register him self and enter all details about himself/ his/her business like type of business, catalogues, address, specialty etc etc 2) With registration will pay to the app owners account a fee of Rs 500 or so decided. 3) With this fees the business house can share the link with his customers for fixing appointment schedules to visit there business entity and get the privilege services 4) Now customer can use the link ( as sent by his known business house) and register him self/her self with mobile number (OTP based Verified) and book for appointment 5) Appointment is confirmed then it will deducte Rs 50 from his balance or so decided amount ( may be zero or any amount), if amount is low then it will ask the business entity to recharge 6) An alert will go to the business house to approve or modify the time and date for this they may have a con call also. 7) Once appointment is confirmed customer will get a QR code on his mobile on what’s app / email.. 8) On schedule time customer will reach to the destination and QR code is shown to the security or manager of the business entity to scan and provide him the further access 9) Completion of appointment alert and close success. 10) If any other scenario then reminder 11) Reports business entity wise with date range parameters sort, index, export 12) Reports customer wise with date range parameters – sort, index, export Technolgy On GCP platform ( account details will be provided) with back end in MYSQL ( server detail will be provided) Technical Skills Angular Java, Github, Full Stack Developer