Student Researcher (LLM Post Training - Agent & Reinforcement Learning) - 2026 Start (PhD)

Responsibilities About the team The Seed LLM Post Training team is responsible for researching cutting‑edge posttrain technologies and providing core posttrain capabilities for unified multimodal large models. The team's goal is to research and explore next-generation advanced technologies such as SFT, RM, RL, and self‑learning during the posttrain phase, while significantly optimizing and improving key areas including reasoning, coding, agent, and omni model. Responsibilities Explore large‑scale models and optimize systems. Data construction, instruction tuning, preference alignment, and model optimization. Improving relevant model capabilities, such as reasoning, code, math etc. In‑depth research and exploration of future use cases. Qualifications Minimum Qualifications: Currently pursuing a PhD in Computer Science, AI, or a related field. Research experience in reinforcement learning, sequential decision‑making, or agent behavior. First‑author publications in accredited ML/AI conferences (e.g., NeurIPS, ICLR, ICML). Solid programming and experimentation skills, including with RL or LLM frameworks. Preferred Qualifications Experience with LLM agents, tool use, or prompt‑based control. Familiarity with environments such as WebArena, ALFWorld, or programmatic reasoning tasks. Understanding of RL techniques such as reward shaping, memory augmentation, or curriculum learning. As a condition of employment, all successful candidates must be able to establish authorization to work in the United States. For this position, the Company does not provide sponsorship or any immigration‑related benefits. Job Information 【For Pay Transparency】Compensation Description (Hourly) - Campus Intern The hourly rate range for this position in the selected city is $85- $85. Benefits may vary depending on the nature of employment and the country work location. Interns have day one access to health insurance, life insurance, wellbeing benefits and more. Interns also receive 10 paid holidays per year and 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. 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 Interacting and occasionally having unsupervised contact with internal/external clients and/or colleagues; Appropriately handling and managing confidential information including proprietary and trade secret information and access to information technology systems; and Exercising sound judgment. About Doubao (Seed) Established in 2023, the ByteDance Seed team is dedicated to pioneering new paths toward artificial general intelligence. We aspire to advance the frontier of intelligence to drive progress for both technology and society. With a long‑term vision for the AI sector, the Seed team's research spans MLLM, GenMedia, AI for Science, and Robotics. We maintain a global presence with laboratories and career opportunities across China, Singapore, and the United States. To date, we have launched industry‑leading general foundation models and cutting‑edge multimodal capabilities. Our technology powers over 50 application scenarios—including Doubao, Jimeng, TRAE, Dola and Dreamnia—and serves enterprise customers through Volcano Engine and BytePlus. Third‑party data shows that the Doubao App ranks first in user volume in the Chinese market, while Doubao foundation models lead the industry in average daily token consumption. Why Join ByteDance 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. Reasonable Accommodation ByteDance 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 #J-18808-Ljbffr ByteDance