TikTok
Machine Learning Engineer Intern (E-Commerce Recommendation Video)- 2027 Summer
Seattle, Washington · Internship · Posted Oct 28, 2026
- Education
- Currently pursuing an undergraduate degree in Software Development, Computer Science, Computer Engineering, or a related discipline.
About the job
Build and improve TikTok Shop’s large-scale e-commerce recommendation systems across video, livestream, and product scenarios, from retrieval through ranking and blending.
What you'll do
- Scale recommendation models and optimize their training and production serving under strict latency constraints.
- Develop generative retrieval using semantic item representations and large models, and apply model knowledge to user-interest discovery.
- Optimize recommendation training and inference, build agent-assisted R&D workflows, and research recommendation problems such as retention and cold start.
What they ask for
- Currently pursuing an undergraduate degree in Software Development, Computer Science, Computer Engineering, or a related discipline.
- Strong machine-learning and engineering fundamentals, including algorithms, data structures, and clean, efficient, reproducible code.
- Deep research or engineering practice in at least one area: LLMs/foundation models, NLP, CV, RL, or recommendation/search/ads.
- Enthusiasm for applying LLM/LRM techniques in production and ability to define and decompose ambiguous problems.
Nice to have
- Publications at listed venues or comparable venues, or high-quality open-source work.
- Experience in areas such as CUDA/Triton, distributed training, LLM post-training, agent systems, inference acceleration, or recommendation/search/ads projects.
Tools
LLMs, RQ-VAE, SID, CUDA, Triton, SFT, RLHF, DPO
AI focus
Build and scale LLM-based recommendation and generative retrieval; use large and reasoning models for user-interest discovery; develop agent-assisted R&D workflows; and conduct original research on recommendation.
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