Community Sharing App Development

I'm looking for an experienced app developer to create a community-based sharing app for both iOS and Android platforms.

Key functionalities include:
- User Profiles: Allow users to create and customize their profiles.
- Content Sharing: Enable users to share various types of content within the community.
- Messaging System: Facilitate direct communication between users.

The app needs to integrate with Instagram and LinkedIn.

Ideal Skills & Experience:
- Proficiency in both iOS and Android app development
- Strong background in building social networking features
- Experience with social media integration, especially Instagram and LinkedIn
- Familiarity with user interface and user experience design principles

Please provide examples of similar work done in your bid.