TikTok
Applied Scientist Intern (Recommendation AI Lab) - 2026 Start (PhD)
San Jose, California · Internship · Posted Oct 28, 2026
- Education
- Currently pursuing a PhD in Computer Science, Computer Engineering, or a related technical discipline.
About the job
Research and develop foundation-model-based recommendation and advertising systems, including intelligent ad placement and real-time training and inference.
What you'll do
- Explore recommendation and advertising foundation-model scaling and unified multimodal modeling.
- Build intelligent ad placement systems that balance long-term commercial value with user experience.
- Optimize foundation-model training and online inference for computing costs and real-time performance.
What they ask for
- Currently pursuing a PhD in Computer Science, Computer Engineering, or a related technical discipline.
- Modeling experience in at least one of Ads, Search engine, Recommender System, or NLP/CV.
- Solid foundation in LLM algorithms, including learning and practical experience with single-modal LLM application and deployment.
Nice to have
- Relevant research results and practical experience in natural language processing, computer vision, data modeling, or algorithm optimization.
- Strong programming skills in data structures and fundamental algorithms; C/C++ for traditional coding roles or Python for intelligent coding roles; publications at top conferences are a plus.
Tools
LLMs, C/C++, Python
AI focus
Research and build foundation models for recommendation and advertising, multimodal semantic modeling, intelligent ad placement, and optimized model training and inference.
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