Enhance Flutter Note App

I'm looking for an experienced Flutter developer to enhance my Note Keeper App, which is built for both Android and iOS platforms.

Key Requirements:
- Improve usability based on your expertise
- Add new features like tagging, reminders, or search functionality
- Ensure any enhancements are seamless across both platforms

Ideal Skills and Experience:
- Proficiency in Flutter and Dart
- Experience with Firebase Firestore
- Strong UI/UX design skills
- Familiarity with mobile app state management

Please provide examples of previous work and relevant experience.