Staff/Lead Data Scientist (Model Evaluation) - TikTok Integrity and Safety (San Jose)

Safeguard TikTok’s content, users, and privacy by building and maintaining metrics, monitoring, and anomaly detection systems for content safety and account risk. Apply rigorous statistics (A/B testing, causal inference, regression) to evaluate security policies and optimize experiment design. Develop data mining and quantitative analysis frameworks, and design LLM evaluation metrics using strong ML Ops practices. Mentor team members and partner with product, ops, R&D, and algorithms to drive measurable safety improvements.