Cross-Platform Social Networking App

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

Key features include:
- Messaging: Real-time chat functionality.
- Profile Creation: User profiles with customizable options.
- News Feed: Dynamic content feed.

Ideal skills and experience:
- Proven experience in cross-platform app development.
- Strong background in social networking apps.
- Expertise in real-time messaging systems.
- UI/UX design skills for engaging user interfaces.

Please provide a portfolio with relevant projects.