TikTok-like Flutter App Development

I need a Flutter app that replicates the core functionalities of popular short video platforms like TikTok, Moj, and Josh. If you have a ready-made script, that would be a huge plus!

The app should support both iOS and Android platforms and include the following major features:
- Video uploading and sharing
- Live streaming
- In-app messaging

User authentication is required through:
- Email/password login
- Social media login
- Phone number login

Ideal skills and experience:
- Proficiency in Flutter development
- Experience with video streaming and sharing functionalities
- Familiarity with implementing secure user authentication methods
- Previous experience in developing similar social media or video-sharing applications

Please provide samples of your previous work and any ready-made scripts you may have.