Android App for Social Media Posting

I need a skilled Android developer to create an application that enables users to post images and videos on Facebook and Instagram.

Key Features:
- Content Types: The app should support posting of images and videos.
- User Authentication: Users must be able to log in through their social media accounts, ensuring a seamless and secure experience.

Ideal Skills:
- Proficiency in Android app development.
- Experience with integrating social media APIs.
- Knowledge in implementing secure user authentication systems.

Please provide examples of similar projects you've done in the past. I'm looking for a developer who can deliver a smooth, user-friendly application.