Enhance Existing FlutterFlow App -- 2

I have an school management app that was built in FlutterFlow and it’s already live, but it has outgrown its original architecture. Core features work, yet performance, maintainability, and polish all need serious attention... (Budget: $50 - $100 USD, Jobs: App Development, Flutter, FlutterFlow, Mobile App Development, Mobile Development, Performance Tuning, Software Development, Software Engineering)