iOS Social Networking App Development

I'm looking for an experienced iOS developer to create a social networking application.

Core Features:
- Messaging: Real-time chat functionality
- Profile Creation: User profiles with customizable options
- Content Sharing: Post and share photos, videos, and updates

User Authentication:
- Sign up and log in using phone numbers

Ideal Skills and Experience:
- Proven track record in iOS app development
- Expertise in building secure messaging systems
- Strong UI/UX design skills for seamless user experience
- Experience with phone number authentication

Please provide samples of similar work and estimated timelines.