Large Model Algorithm Engineer Intern (Data Model) - 2026 Start (PHD)

Responsibilities

Team Introduction
The Data Model team focuses on the application and implementation of large models in the field of data intelligence, providing horizontal support for large-model solutions across multiple data products of the company. The team is committed to keeping up with cutting-edge advancements in large models, designing end-to-end algorithm optimization and evaluation solutions by integrating domain-specific model optimization strategies, and achieving intelligent upgrades of data products along with improved application effectiveness. We encourage agile innovation and dedicate ourselves to the continuous exploration and research of data intelligence topics.

We are looking for talented individuals to join us for an internship in 2026*. PhD Internships at TikTok aim to provide students with the opportunity to actively contribute to our products and research, and to the organization's future plans and emerging technologies.

Candidates can apply to a maximum of two positions and will be considered for jobs in the order you apply. The application limit is applicable to TikTok and its affiliates' jobs globally.

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

Successful candidates must be able to commit to at least 3 months long internship period.

Responsibilities:
- Data enhancement algorithm optimization: Design a data-centric algorithm framework for data reasoning tasks, optimize the Reasoning Data synthesis pipeline, and improve the logical consistency, domain adaptability, and diversity of training data.
- Innovative integration of data and reasoning LLM: Address the Over/Under-Thinking issues in chain-of-thought generation, and explore technical challenges in applying LLMs to complex data analysis and development tasks.
- Application and implementation of reasoning LLM: Track the technical evolution of open-source SOTA large models, practice domain adaptation optimization in the post-training phase, verify application value, achieve continuous iteration of effectiveness based on evaluation systems, and generate technical patents.

Qualifications

Minimum Qualifications:
- Currently pursuing a PhD in Computer Science, engineering or quantitative field.
- Proficiency in Python, PyTorch, and related code libraries
- Familiarity with research work and algorithms in the large-model field, especially those related to reinforcement learning

Preferred Qualifications:
- Research experience in LLM & NLP is preferred.
- Candidates with high-impact conference papers or awards in renowned competitions are preferred.
- Excellent academic vision and judgment, strong ability to solve problems, as well as good teamwork spirit and communication.

By submitting an application for this role, you accept and agree to our global applicant privacy policy, which may be accessed here: https://jobs.bytedance.com/en/legal/privacy

If you have any questions, please reach out to us at apac-earlycareers@bytedance.com

Job Information

About Us

Founded in 2012, ByteDance's mission is to inspire creativity and enrich life. With a suite of more than a dozen products, including TikTok, Lemon8, CapCut and Pico as well as platforms specific to the China market, including Toutiao, Douyin, and Xigua, ByteDance has made it easier and more fun for people to connect with, consume, and create content.​

Inspiring creativity is at the core of ByteDance's mission. Our innovative products are 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 enrich life - a mission we work towards every day.​

As ByteDancers, 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. 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​

ByteDance 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 ByteDance, our mission is to inspire creativity and enrich life. 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.​