Cross-Platform Social Networking App Development

I'm looking to develop and launch a social networking mobile application for both iOS and Android platforms.

Key features:
- User profiles
- Messaging
- News feed

Ideal skills and experience:
- Proven experience in mobile app development, especially for social networking platforms.
- Strong knowledge of both iOS and Android development environments.
- Expertise in building secure and scalable messaging systems.
- Experience in designing intuitive and engaging user interfaces.

Please provide examples of similar projects you've completed.