Upgrades to existing Flutter App with Firebase Cloud Messaging, Google Maps, Mac OS Android Studio

We are looking for an experienced Flutter developer for add-ons to our existing Flutter Apps developed in Android Studio on Mac Monterrey OS utilizing Firebase Database, Firebase Cloud Messaging, Google Maps, and Xcode. The work will be of on-going nature. We will start with a small add-on project and continue with monthly projects for the right candidate. Must have thorough knowledge of Flutter/Xcode/Firebase. We have attached a copy of the first list of add-ons for the first project.