Cross-Platform Social Networking App Development

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

Key Features:
- User profiles and posts
- Friends or followers system
- Ability to post pictures and texts

Ideal skills and experience:
- Proven experience in developing cross-platform mobile apps
- Strong background in social networking app features
- Proficiency in both iOS and Android development
- UI/UX design skills to ensure a user-friendly experience

Please provide samples of previous work in your bids.