Research Scientist - TikTok E-Commerce Recommendation Foundation

TikTok; San Jose (CA); On-site; USD 162,000 - 388,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

401(k) match

Paid parental leave

Paid holidays

Job summary

TikTok is a global tech company seeking researchers to advance its recommendation intelligence by building a unified Foundation Model for cross-business use cases. You will drive research and engineering to improve retrieval, ranking, and re-ranking, while exploring generative capabilities and multimodal integration.

The role emphasizes a strong research mindset and collaboration, with opportunities to publish, experiment, and contribute to shaping next-generation recommender systems.

Qualifications

• MS/PhD in CS or related field or equivalent research experience.
• Strong foundation in ML, DL, or information retrieval.
• Proficiency in Python and PyTorch.
• Strong passion for intelligent recommendation systems and a self-driven research mindset.

Responsibilities

• Build and optimize cross-scenario Foundation Models for unified modeling and efficient inference.
• Advance event-sequence-driven generative recommendation with multimodal understanding.
• Apply LLM technologies across retrieval, ranking, and re-ranking; contribute to training and inference optimization.
• Explore integration of LLMs/VLMs with recommender systems for adaptive intelligent agents.
• Research end-to-end generative recommendation and system optimization methods balancing efficiency and UX.

Skills

MS/PhD in CS

ML / DL / IR

Python & PyTorch

Research mindset

Education

MS/PhD in Computer Science

Tools

PyTorch

Job description

Responsibilities

About the Team

The E-commerce Recommendation Foundation team is dedicated to building the next-generation recommendation intelligence. We aim to develop a unified Foundation Model that supports multi-business and multi-scenario recommendation systems, covering the full pipeline from retrieval and ranking to re-ranking, and driving a comprehensive upgrade in intelligence and generative capability.

We believe the future of recommendation systems goes beyond predicting click-through rates — it lies in understanding the relationship between people and content, and in generating new connections. The team is exploring an event-sequence-driven generative recommendation paradigm, deeply integrating large language models (LLMs), multimodal understanding, reinforcement learning, and system optimization to advance recommendation systems toward general-purpose intelligent agents.

We value original exploration and encourage both research thinking and engineering excellence. Every team member is empowered to propose hypotheses and validate ideas in an open environment — your code and papers may help define the next paradigm of recommendation systems. We seek individuals with a general intelligence mindset to join us in redefining the future of recommendation.

1. Build and optimize cross-scenario shared Foundation Models to enable unified modeling and efficient inference.


2. Advance the event-sequence-driven generative recommendation paradigm, integrating multimodal understanding and generative capabilities.


3. Apply LLM technologies across retrieval, ranking, and re-ranking stages; participate in model training, inference optimization, and system co-design.


4. Explore the integration of LLMs / VLMs with recommendation systems to develop adaptive and evolving intelligent recommenders.


5. Research end-to-end generative recommendation and system optimization methods that balance efficiency and user experience.

Qualifications

Minimum Qualifications:

1. MS/PhD in Computer Science, related technical field or equivalent industrial research experience.


2. Solid theoretical foundation in machine learning, deep learning, or information retrieval.


3. Proficiency in Python and familiarity with mainstream deep learning frameworks (e.g., PyTorch).


4. Strong passion for intelligent recommendation systems and a self-driven research mindset.

Preferred Qualifications：

1. Experience in large-scale recommendation system development or large-model training, with notable technical achievements in a sub-area.


2. Research experience or publications in LLMs, multimodal learning, reinforcement learning, or generative recommendation.


3. Familiarity with pre-training and post-training processes for large language models (LLMs) or Foundation Models.

Approval

About TikTok

TikTok is the leading destination for short-form mobile video. At TikTok, our mission is to inspire creativity and bring joy. TikTok's global headquarters are in Los Angeles and Singapore, and we also have offices in New York City, London, Dublin, Paris, Berlin, Dubai, Jakarta, Seoul, and Tokyo.

Why Join Us

Inspiring creativity is at the core of TikTok's mission. Our innovative product is built to help people authentically express themselves, discover and connect – and our global, diverse teams make that possible. Together, we create value for our communities, inspire creativity and bring joy - a mission we work towards every day. We strive to do great things with great people. We lead with curiosity, humility, and a desire to make impact in a rapidly growing tech company. Every challenge is an opportunity to learn and innovate as one team. We're resilient and embrace challenges as they come. By constantly iterating and fostering an \"Always Day 1\" mindset, we achieve meaningful breakthroughs for ourselves, our company, and our users. When we create and grow together, the possibilities are limitless. Join us.

Diversity & Inclusion

TikTok is committed to creating an inclusive space where employees are valued for their skills, experiences, and unique perspectives. Our platform connects people from across the globe and so does our workplace. At TikTok, our mission is to inspire creativity and bring joy. To achieve that goal, we are committed to celebrating our diverse voices and to creating an environment that reflects the many communities we reach. We are passionate about this and hope you are too.

TikTok Accommodation

TikTok is committed to providing reasonable accommodations in our recruitment processes for candidates with disabilities, pregnancy, sincerely held religious beliefs or other reasons protected by applicable laws. If you need assistance or a reasonable accommodation, please reach out to us at https://tinyurl.com/RA-request

Job Information

【For Pay Transparency】Compensation Description (Annually)

The base salary range for this position in the selected city is $162000 - $387600 annually.

Compensation may vary outside of this range depending on a number of factors, including a candidate’s qualifications, skills, competencies and experience, and location. Base pay is one part of the Total Package that is provided to compensate and recognize employees for their work, and this role may be eligible for additional discretionary bonuses/incentives, and restricted stock units.

Benefits may vary depending on the nature of employment and the country work location. Employees have day one access to medical, dental, and vision insurance, a 401(k) savings plan with company match, paid parental leave, short-term and long-term disability coverage, life insurance, wellbeing benefits, among others. Employees also receive 10 paid holidays per year, 10 paid sick days per year and 17 days of Paid Personal Time (prorated upon hire with increasing accruals by tenure).

The Company reserves the right to modify or change these benefits programs at any time, with or without notice.

For Los Angeles County (unincorporated) Candidates:

1. Interacting and occasionally having unsupervised contact with internal/external clients and/or colleagues;


2. Appropriately handling and managing confidential information including proprietary and trade secret information and access to information technology systems;


3. Exercising sound judgment.