Android Developer for Douyin Protocol Implementation

I'm seeking an experienced Android developer to help implement protocol-level support for key Douyin (TikTok China) features. This involves reverse engineering and ensuring compatibility for:

- Registration/Login
- Content Publishing
- User Interaction (Likes, Comments, Shares, Reposts, Direct Messaging)
- Livestream Engagement

Ideal Skills & Experience:
- Strong Android development and reverse engineering background
- Experience with SMS-based login systems and mobile app interaction APIs
- Previous similar implementation experience preferred
- Ability to analyze and document risk control mechanisms
- Excellent communication skills for clarity on deliverables and progress

Please refer to the attached document for more details.