Senior Machine Learning Engineer - Search Recommendation, E-commerce

Build and improve the Search Growth E-commerce recommendation engine that powers search and shopping on TikTok and TikTok Mall for over a billion users. Optimize hyperscale recommender systems across the full pipeline from recall/ranking to final ranking, advancing short-text and general recommendation with strong NLP integration. Provide mentorship to teammates while driving analysis, modeling, and problem-solving to enhance user search and purchasing cognition.