Photo Sharing Social Media App

I'm looking to develop a photo-sharing social media app for iOS and Android platforms.

Key Requirements:
- User Registration/Login
- Profile Creation and Customization
- Photo Upload and Sharing
- Like, Comment, and Share Features
- Follow/Unfollow Functionality
- Explore/Discover Page Based on Interests
- Search Bar for Users and Hashtags
- Video Calling Feature Integration
- Notifications for Activity
- In-app Messaging

Ideal Skills and Experience:
- Expertise in mobile app development for iOS and Android
- Experience in building social media applications
- Proficient in UI/UX design for engaging user experiences
- Strong backend development skills to handle databases and server-side logic
- Knowledge of integrating video calling features

Please include relevant portfolio work and past project experiences. Looking forward to your bids!