United States
Machine Learning Engineer at Sunday Robotics. Previously Senior Staff MLE at TikTok Search, where I led the Search Relevance Team. We built VLM models for video understanding, ranking, and retrieval — and made sure TikTok's search engine stayed both relevant and safe. My work centered on visual pretraining and post-training of VLM/LLM via SFT and RL. Before TikTok: MLE at Kuaishou, Applied Scientist at Amazon AI (AWS Rekognition), researching unified video understanding systems. CMU, M.S. in Computer Vision. Peking University, B.S. in Computer Science, Summa Cum Laude. Bronze, China NOI 2013.
Led the Relevance and Pre-training Team at TikTok Search, driving multimodal video pre-training and post-training for video relevance.
Video Pretraining for Search and Recommendation
Amazon AWS Rekognition Team