Firebase Authentication and Role Integration

I'm looking for an experienced Firebase developer to enhance my existing project by integrating several key authentication features. The project is already set up with Firebase config, and I have a working front-end UI in HTML/CSS/JS. Here's what I need:

Key Requirements:
- Integrate Google Sign-In using Firebase Authentication, allowing both sign in and sign up.
- Implement Phone Number OTP Login with Firebase Authentication. On OTP verification errors, an error message should be displayed.
- Develop a user role selection feature at login, where users can choose between 'Customer' and 'Chef'. The selected role should be stored in Firestore.
- Ensure that after login, users are directed to their respective dashboards: Customers to the customer dashboard and Chefs to the chef dashboard (both dashboards are already created).
- Save user data, including name, phone number, and role, to Firestore.

Ideal Skills and Experience:
- Proficiency with Firebase Authentication and Firestore.
- Experience with integrating Google Sign-In and Phone Number OTP Login.
- Strong understanding of HTML, CSS, and JavaScript for seamless integration with the existing UI.
- Ability to handle user data securely and efficiently.

I will provide the Firebase configuration, a clear flow for both customer and chef interfaces, and the existing front-end UI. If you have the expertise to implement these features, I would love to hear from you!