Flutter App Enhancement: Real-time Call Notetaking & Tagging

I'm looking to enhance my Flutter-based calling app. The goal is to incorporate a feature that allows users to take both text and voice notes during real-time cellular voice calls.

Key Features:
- Notetaking: Users should have the ability to take both text and voice notes during calls.
- Organization: Notes should be organized by caller ID.
- Tagging System: A combination of predefined and custom tags should be implemented for the calls.

Ideal Skills:
- Proficiency in Flutter and Dart
- Experience with real-time data processing
- Knowledge of UI/UX design principles for mobile applications

Experience:
- Prior experience with developing call-based applications will be a plus.
- Proven track record of implementing similar notetaking and tagging features.