Research Engineer - AI Training Systems Reliability & ...

Responsibilitie About the Team The Seed Infrastructures team oversees the distributed training, reinforcement learning framework, high-performance inference, and heterogeneous hardware compilation technologies for AI foundation models. Responsibilities - Ensure the training platform operates reliably and efficiently across pre-training, fine-tuning, evaluation, and inference workloads for large models - Build and maintain system observability, fault detection, and troubleshooting tools, enabling AI Ops-driven proactive monitoring of distributed ML workloads - Maintain the stability, elasticity, and performance of framework and infrastructure components across multi-tenant, multi-cloud, and heterogeneous GPU environments - Manage cluster governance, optimize resource utilization, and improve operational efficiency and reliability of ML services - Develop software tools, dashboards, and automation to monitor, manage, and diagnose ML training infrastructure effectively - Participate in global team rotations for system monitoring, on-call support, and incident response Qualification Minimum Qualifications: - Strong background in computer systems or computer architecture - Proficiency in C++ and Python, with strong systems engineering skills - Solid understanding of the PyTorch training framework, including: Training execution flow and runtime behavior; CUDA kernel scheduling and synchronization semantics; Interactions between PyTorch, CUDA, NCCL, and the networking stack - Familiarity with distributed training frameworks or parallelization strategies, such as: Megatron-LM (tensor, pipeline, and sequence parallelism); Fully Sharded Data Parallel (FSDP), including parameter sharding, communication, and memory management - Ability to reason about performance bottlenecks in complex training systems and conduct systematic analysis Preferred Qualifications: - Experience with one or more of the following tools or technologies: torch.profiler, Nsight Systems, Nsight Compute; CUPTI, NVTX; Distributed communication fundamentals (e.g., NCCL, RDMA) Job Information [For Pay Transparency]Compensation Description (Annually) The base salary range for this position in the selected city is $198360 - $416100 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: Qualified applicants with arrest or conviction records will be considered for employment in accordance with all federal, state, and local laws including the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act. Our company believes that criminal history may have a direct, adverse and negative relationship on the following job duties, potentially resulting in the withdrawal of the conditional offer of employment: 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; and 3. Exercising sound judgment. About Doubao (Seed) Founded in 2023, the ByteDance Doubao (Seed) Team, is dedicated to pioneering advanced AI foundation models. Our goal is to lead in cutting-edge research and drive technological and societal advancements. With a strong commitment to AI, our research areas span deep learning, reinforcement learning, Language, Vision, Audio, AI Infra and AI Safety. Our team has labs and research positions across China, Singapore, and the US. 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

Created: 2026-03-11