Junwei Yu

Hi! I'm a researcher at Berkeley AI Research (BAIR) lab, where I'm very fortunate to be advised by Dr. XuDong Wang and Prof. Trevor Darrell. I received my Bachelor's degree in Computer Science (Honors) and Applied Mathematics from UC Berkeley in 2025. You can find my coursework here.

My research focuses on self-supervised learning, vision foundation models, and multimodality. I also have experience in learning theory and optimization.

Email  /  CV  /  Scholar  /  Github  /  Linkedin

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Publications

UnSAMv2: Self-Supervised Learning Enables Segment Anything at Any Granularity
Junwei Yu, Trevor Darrell, XuDong Wang
arXiv 2025
Paper | Project page | Code
Fast John Ellipsoid Computation with Differential Privacy Optimization
(Alphabetical Order)
Xiaoyu Li*, Yingyu Liang*, Zhenmei Shi*, Zhao Song*, Junwei Yu*
CPAL 2025, Oral
Paper
Quantum Speedups for Approximating the John Ellipsoid
(Alphabetical Order)
Xiaoyu Li*, Zhao Song*, Junwei Yu*
QIP 2025
Paper

Experience

Voio: Member of Technical Staff
Jan 2026 - Present: Research Team
Amazon: Software Engineering Intern
Summer 2025: Member of Global Payment Tech
DATA C140: Probability for Data Science
Fall 2024: Tutor
Supervised by Prof. Ani Adhikari