Sr. Multimodal Model Training and Inference Optimization Engineer

About the team

The Vision-Applied Research team focuses on applied research in Generative AI and CV/Multimodal Understanding, and delivering intelligent solutions to Byte Dance products, e.g., Tik Tok, Cap Cut, and Lemon8, enabling users to make and share creative content in a much easier way. The team has research groups dedicated to generative models for content creation, image generation, video synthesis, intelligent image/video editing, and virtual humans.

• Optimize large model training pipelines to improve efficiency, speed, and scalability.
• Develop and improve distributed training strategies such as data parallelism, model parallelism, pipeline parallelism and communication to accelerate model training.
• Benchmark and profile deep learning models to identify performance bottlenecks and optimize computational resources.

Minimum Qualifications:

• M.S or PhD in Computer Science, Electrical Engineering, Artificial Intelligence, or a related field.
• 3 years+ experience in AI model training optimization.
• Strong software engineering skills, including proficiency in Python, C++, and CUDA.
• Strong proficiency in deep learning frameworks such as PyTorch, Megatron and Deepspeed.
• Experience with distributed training techniques such as data parallelism, model parallelism, and pipeline parallelism.
• Knowledge of transformers and diffusion models.

Preferred Qualifications:

• Candidates with publications at conferences such as MLSys, NeurIPS, ICLR, or ICML are preferred.
• Strong communication and teamwork skills.
• Self‑motivated and strong problem‑solving skills.
• Ability to work collaboratively in multi‑functional teams.
• Experienced in implementing and optimizing complex and performance‑critical systems.

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

Inspiring creativity is at the core of Byte Dance'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 Byte Dancers, 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.

Byte Dance 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 Byte Dance, our mission is to inspire creativity and enrich life. To achieve that goal, we are committed 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.

Byte Dance 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

【For Pay Transparency】Compensation Description (Annually):
The base salary range for this position in the selected city is $208,800 - $438,000 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. This role may be eligible for additional discretionary…