Flutter Project Continuous Improvement & Debugging IOS IDE

We are looking for a Flutter expert with experience in Firebase, Xcode, Android Studio, Google Maps, and Cloud Messaging for IOS Environment. We need continuous Improvements and Debugging of existing Apps. Initially, all work to be done on our MacBook using Remote Access. Later on, source code will be uploaded. We will create small $50 milestone for each step. There is no limit on project budget. We will setup an online session to introduce the source code then decide on the first milestone. Please refer to following link to get idea of how the apps look & feel: https://dispatchlabor.com/.