SSL Pinning Implementation in Android App

I need an SSL pinning expert for my Android app. The primary aim is to enhance the app's security, particularly focusing on user authentication. The app currently uses OKHttp for networking.

Key Requirements:
- Proficiency in implementing SSL pinning for Android applications
- Extensive experience with OKHttp
- Strong background in Android security measures
- Ability to work with rooted devices and understand system-level certificate installation

The ideal candidate should be able to ensure robust security against potential threats, particularly during user authentication. Prior experience with SSL pinning on rooted devices is a plus. I am looking for someone who can deliver high-quality work efficiently.