Start now Firebase expert Android for few simple fixes in code

Budget:30$, please apply only within budget and having 3+ yrs of experience in firebase, Android. 1)Firebase User should create after complete signup like the selection of universities, college, branch, semester, currently, it's creating before OTP screen at Signup and when I try to signup with the same Email, it says email already exists. 2)Add score value to quiz result and chapter quiz result into FB, code already there, need to call function. 3)Show current plan with a list of semesters which user paid for along with validity date at My account screen, User should be able to change semesters and data should be changed automatically, currently, university id, college id, branch id, semester id are stored in Users collection and calling throughout the app. 4)Free user -10 days access only, can use only 1 subject,1 chapter, other subjects, chapters should be visible but redirect to Myaccount screen to purchase. 5)Paid users can access all till validity date. You can get it from Transactions collection with a validity date 6)Need to restrict a user to install and use with only 1 IMEI number, cannot log in into multiple mobiles. 7)Some values are not inserting if offline, need to check and make sure all values are going into Firebase 8)need online/offline for package screen,offline not storing at quiz submission,few values. *Need to have anydesk,push/pull code via bitbucket as continuous integration, test, review code, release milestone. Communication is very important, patience during work. Looking for a long term relationship. Deadline :2 days