Android Expense Manager App

I'm looking for an experienced Android developer to create a personal expense management app. The app should be fully functional and include the following key features:

- Add, edit, and delete expense entries
- Custom categorization of expenses (e.g., Food, Travel, Shopping, Entertainment, Health, Bills, etc.)
- View detailed monthly reports
- Data storage using Firebase
- Clean, modern UI with Material Design
- Optional: Charts for visualizing spending trends

Ideal skills and experience:
- Proficiency in Android app development
- Experience with Firebase for data storage
- Strong UI/UX design skills, particularly with Material Design
- Ability to implement customizable features as per user requirements

Please ensure the app is user-friendly and visually appealing. Looking forward to your proposals!