Android Social Media App Development

I need an Android developer to create a social media app.

Key requirements:
- User profiles
- Posting and sharing content
- Commenting and liking features
- Private messaging
- Notification system

Ideal skills and experience:
- Proven Android development expertise
- Experience with social media app development
- UI/UX design skills
- Familiarity with real-time databases and notifications

Looking for a clean, user-friendly design and robust functionality. Please include a portfolio with your bid.