[Remote] Machine Learning Scientist Intern (TikTok-Content Ecology—LLM application) - 2026 Start (PhD)

Note: The job is a remote job and is open to candidates in USA. TikTok is the leading destination for short-form mobile video. The Content Ecology Algorithm Team is seeking a Machine Learning Scientist Intern to contribute to AI innovations in LLMs, NLP, and Computer Vision, enhancing TikTok’s growth and user engagement through advanced algorithms and models. Responsibilities Develop and optimize LLM, NLP, CV, and recommendation models to improve TikTok’s content ecosystem Implement multimodal AI solutions, integrating video, text, and speech understanding Optimize LLM-powered search, discovery, and content recommendation systems for better user engagement Train and fine-tune deep learning models using TensorFlow, PyTorch, or other ML frameworks Deploy and scale machine learning solutions in a distributed computing environment Work closely with AI researchers, software engineers, and business teams to apply AI technologies effectively Skills PhD in Computer Science, Machine Learning, AI, or a related field Strong programming skills in Python, C++, or similar languages Hands-on experience with deep learning frameworks such as TensorFlow or PyTorch Solid understanding of machine learning, NLP, CV, or recommendation algorithms Experience with distributed computing and optimizing AI models for real-world applications Ability to apply machine learning techniques to enhance business and user experiences Publications in top AI/ML conferences (NeurIPS, ICML, CVPR, ACL, etc.) or strong contributions to open-source AI projects Benefits Interns have day one access to health insurance Life insurance Wellbeing benefits 10 paid holidays per year Paid sick time (56 hours if hired in first half of year, 40 if hired in second half of year) Interns who are not working 100% remote may also be eligible for housing allowance Company Overview TikTok is a short-form video entertainment app and social network platform. It is a sub-organization of ByteDance. It was founded in 2003, and is headquartered in Los Angeles, California, USA, with a workforce of 10001+ employees. Its website is Company H1B Sponsorship TikTok has a track record of offering H1B sponsorships, with 979 in 2025, 601 in 2024, 387 in 2023, 322 in 2022, 133 in 2021, 72 in 2020. Please note that this does not guarantee sponsorship for this specific role.