Full stack Developer for Douyin Feature Implementation -- 2

I'm seeking an experienced Android developer to help reverse engineer and implement key Douyin (TikTok China) features. We need protocol-level support for:

- Mobile Number Registration/Login
- Authentication protocols
- Two-factor authentication
- User session management

- Content Publishing
- Text and multimedia posts
- Scheduled publishing
- Hashtags and tagging

- User Interaction
- Livestream Engagement
- Risk Control Reporting (Mandatory)

Ideal candidates should have:
- Proven experience with Android development
- Expertise in reverse engineering
- Strong background in implementing secure authentication protocols
- Familiarity with content publishing platforms

Please include relevant work samples with your application.