Build the Backend the app in flutter with firebase (part-time)

We have to follow up a team and build some features in the app. But we need to be connected to do it. we will work 6 hours per day by google meet. Weekly Payment
This is the workflow of the app
https://miro.com/welcomeonboard/N3lhM05Ed1h0UVVSdHJ0TWt1dVhPMDdKUFBsOWpmSHdIbnhxSWtHRlNuWFpmNnpJYVBWaGpabXZPR0drSWJweXwzNDU4NzY0NTE5NTU0NzQxOTEwfDI=?share_link_id=373456064704
This is the list of task:
*add the properties in the admin panel and connect them with the app
*the likes per user and stop to find properties
*jump to the allocation money
*Stripe integration (500 Aud deposit)
*Activity Screen conected with the activity of the user
*twilio OTP sms function or use firebase
*Add camera features in the setup profile page
*Calculate your purchase Power page bug fix with expense page

Notification system for usesr individually and in general
When the person gets out from the app, when the user log in again it should go to the home (not ask the code again)

And Publish the app in the store

Please apply if your are ready to work and give a time estimate for the work