Machine Learning Engineer (Content Ecology & Creator) -E-commerce Governance

Global E-Commerce | Governance & Experience Algorithm Team
About the Team Building a Prosperous, Trusted, and Fair Global E-Commerce Ecosystem
We are the Governance & Experience Algorithm Team, the AI guardians ensuring the long-term health of Tik Tok Shop’s global platform.

As our international business expands, our mission goes beyond traditional risk control. We are dedicated to constructing a prosperous, trusted content ecosystem and maintaining a fair, healthy environment for creators.
We leverage LLM agents, RAG, GNN, and Sequence Modeling to solve complex governance challenges. We don't just block bad actors; we shape the rules of the game to ensure that creativity is rewarded, fairness is upheld, and the ecosystem thrives.

Our Core Mission:

• Trust & Quality: Ensuring users trust what they see, establishing a standard where "Good Content = Good Business."
• Creator Governance: Managing the full lifecycle of creators by identifying malicious intent (e.g., piracy, content mills) while protecting high-potential authentic creators.
• Ecosystem Fairness: using AI to ensure fair traffic distribution and prevent monopolies by bad actors, fostering a diverse and sustainable creator community.

What You’ll Do:

Creator Governance & Quality Modeling:

• Signal-Driven Creator Profiling: aggregated underlying multi-modal signals (e.g., static frames, low-aesthetic detection, piracy fingerprints) to build comprehensive Creator Quality Scores.
• Combat Low-Quality & Malicious Intent: Develop sequence-based models to detect and penalize creators engaging in "low-effort selling," "re-recording/piracy," and "matrix account spamming," effectively purging the ecosystem of noise.
• LLM & RAG Intelligent Governance: Build LLM + RAG systems that dynamic interpret complex governance policies. Develop agents that not only flag risky creators but provide explainable reasoning to guide creator education and improvement.

Graph Intelligence & Syndicate Detection:

• Heterogeneous Graph Mining: Construct large-scale Heterogeneous Graphs (Creator-Product-Video-User) to uncover hidden relationships and organized bad actors (e.g., fake engagement rings, black-market account trading, sybil attacks).
• Cross-Domain Risk Propagation: Utilize graph algorithms to track how risk propagates across different scenarios (Content vs. Shelf) and markets, predicting where bad actors will migrate next.
• 1. Ecosystem Strategy, Fairness & Optimization
• Multi-Objective Optimization (MMoE/PLE): Develop advanced multi-task learning models to balance conflicting objectives—maximizing Ecosystem Prosperity and GMV while minimizing Governance Risk and User Complaints.
• Fairness Algorithms: Design traffic regulation strategies that prevent the "rich get richer" effect for low-quality diverse content, ensuring fair exposure for high-quality, original creators.

Requirements:

Minimum Qualifications:

• Bachelor's degree or above in computer science or related field

• Proficient in Python/C++ with strong hands-on experience in Py Torch or Tensor Flow

• Deep expertise in at least one of the following areas: NLP/LLM (Agents/Tuning), Graph Neural Networks (GNN), Sequence Modeling, or Machine Learning

• 1+ years of experience in Content Governance, Trust & Safety, Creator Ecology, or Advertising/Search/Recommendation

• Preferred Qualifications

• Cutting-Edge Application: Experience with RAG, DPO/RLHF, or Multi-Modal Representation Learning in a production environment is highly preferred

• You view problems through an ecosystem lens—caring about Health, Fairness, and Diversity, not just binary classification metrics (Precision/Recall)

• Ability to translate abstract business goals (e.g., "Improve Creator Fairness") into concrete mathematical definitions and model targets

• Strong communication skills to articulate algorithmic strategies to Policy, Operations, and Product teams

• You enjoy the "cat and mouse" game of outsmarting evolving bad actor techniques