Cross-Platform Social Networking App Development

I'm looking for an experienced app developer to create a social networking app for both iOS and Android platforms. The app should include:

- Messaging system: Real-time chat functionality
- User profiles: Customizable profiles with personal information
- News feed: Dynamic content stream with posts and updates

Ideal skills and experience:
- Proven track record in developing social networking apps
- Expertise in both iOS and Android platforms
- Strong background in real-time messaging and dynamic content feeds
- UI/UX design skills to ensure an engaging user experience

Please provide examples of similar projects and your estimated timeline.