Development help for Flutterflow project

I'm building an app in flutterflow for managing a sports club. I need someone to help me with some specific tasks. For example build a users page, add a permission role system etc. I need someone who is experienced in flutterflow. All coding must be done according to best practices. The app needs to be fully responsive and working on web and mobile and tablet (android/iphone). Backend is firebase.

Billing will be done via Freelancer (Desktop app). There is no set amount of hours, but tasks will com regularly. I might have some other apps in the future to work on.
I wil share access to the Flutterflow app via collaboration invite. I will share a Trello board which holds all the tasks.