Research Scientist Graduate ( Recommendation- Recommender Models PhD

Join to apply for the Research Scientist Graduate (Tik Tok Recommendation-Large Recommender Models) - 2026 Start (PhD) role at Tik Tok

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Join to apply for the Research Scientist Graduate (Tik Tok Recommendation-Large Recommender Models) - 2026 Start (PhD) role at Tik Tok

Responsibilities

You'll be joining the Tik Tok Recommendation team focusing on advancing large-scale recommender systems that power Tik Tok’s personalized content discovery and user experiences. By developing cutting-edge models, we aim to optimize recommendation accuracy, user engagement, and scalability across billions of users. We’re looking for Machine Learning Scientists passionate about building high-performance, scalable recommendation systems. You’ll leverage advanced deep learning techniques and large-scale systems engineering, collaborating with cross-functional teams to solve complex challenges in personalization and recommendation at scale.

Responsibilities

You'll be joining the Tik Tok Recommendation team focusing on advancing large-scale recommender systems that power Tik Tok’s personalized content discovery and user experiences. By developing cutting-edge models, we aim to optimize recommendation accuracy, user engagement, and scalability across billions of users. We’re looking for Machine Learning Scientists passionate about building high-performance, scalable recommendation systems. You’ll leverage advanced deep learning techniques and large-scale systems engineering, collaborating with cross-functional teams to solve complex challenges in personalization and recommendation at scale.

We are looking for talented individuals to join our team in 2026. As a graduate, you will get unparalleled opportunities for you to kickstart your career, pursue bold ideas and explore limitless growth opportunities. Co-create a future driven by your inspiration with Tik Tok.

Successful candidates must be able to commit to an onboarding date by end of year 2026.

We will prioritize candidates who are able to commit to these start dates. Please state your availability and graduation date clearly in your resume.

Applications will be reviewed on a rolling basis. We encourage you to apply early.

Responsibilities

• Research and develop large-scale recommender systems for personalized, engaging user experiences, focusing on scalability, accuracy, and performance.
• Apply advanced machine learning and deep learning techniques to optimize recommendation algorithms for Tik Tok’s diverse user base.
• Manage the end-to-end lifecycle of recommender models, from training and fine-tuning to deployment, monitoring, and continuous improvement.
• Analyze complex data to uncover user preferences, behaviors, and trends, driving personalization and enhancing Tik Tok’s recommendation capabilities.
• Collaborate with cross-functional teams (infrastructure, product, research, etc.) to design and implement innovative solutions that improve the relevance and diversity of Tik Tok recommendations.

• Ph.D. degree in Computer Science, Machine Learning, Artificial Intelligence, Statistics, or a related field.
• Experience in one or more areas of recommender systems, machine learning, computer vision, or natural language processing.
• Proficiency in programming skills, solid foundation in data structures and algorithms.
• Strong familiarity with deep learning architectures such as transformers, CNNs, RNNs, LSTMs, etc.
• Excellent analytical and problem-solving skills, with the ability to collaborate effectively in cross-functional teams.

• Ph.D. in Computer Science, Electrical Engineering, or related fields.
• Experience in building large-scale recommender systems that handle vast, diverse datasets and complex user interactions.
• Publications in top-tier venues such as Rec Sys, SIGGRAPH, CVPR, ICCV, ICML, NeurIPS, ICLR, or similar conferences/journals.