Applied Scientist Intern (Recommendation AI Lab) - 2026 Start (PhD)

Work on TikTok’s next-generation advertising recommendation systems by applying foundation-model research to large-scale recommendation and search. You’ll explore LLM and recommender scaling laws, build unified multimodal foundation models, and design intelligent ad placement systems optimized for long-term value and ROAS. Partner with the team to improve full-process training and real-time inference, balancing compute cost with latency for production deployment.