Multi-Function Android App Development

I need an experienced Android developer to create a comprehensive application with the following functionalities:

User Registration:
- Authentication via email/password, social media login, and phone number verification
- Chat options: text, audio, and video

Service Provider Registration:
- Input personal and bank details
- Wallet feature to store earnings from services rendered, with transfer option to bank account

Service and Product Marketplace:
- Various services with adjustable charges
- Product catalog: upload, price details, discounts, ratings, etc.

Payment Integration:
- Secure transactions through PayPal and Google Pay

Ideal Skills and Experience:
- Android development expertise
- Experience with chat and payment integration
- Proficient in creating secure user authentication systems
- Strong UI/UX design skills for a user-friendly interface

Please provide a portfolio showcasing similar projects and an estimated timeline for completion.