Android Firebase Database with Firestore Template

I'm looking for a skilled Android developer to create a Firebase database template with Firestore collections for my application.

Key Requirements:
- Compatibility: The template should be specifically tailored for Android.
- Firestore Collections: The Firestore collections should be designed for storing User profiles, Banned Words, and Banned Numbers.
- User Collection Validation: - The User collection will have specific rules and validations:
- UID: Each user should have a unique identifier.
- Email Address: The user should provide a valid email address.
- Email Verification: Users should confirm their email address.
- Password: Implement a password complexity policy.
- Username: Ensure that each username is unique.
- Stage
- Level: Implement a system for different user levels or permissions.

Ideal Skills:
- Proficiency in Android app development and understanding of Firebase.
- In-depth knowledge of Firestore collections and data structuring.
- Experience in implementing data validations and rules.
- Strong attention to detail to ensure data integrity and security.