About me
I am a late-stage PhD student at Peking University, advised by incredible Prof. Di He. I am also a researcher at ByteDance Seed, working on coding agents. Intern positions are open. Feel free to contact me for potential collaborations or applications (WeChat: hzysweixin).
Recent Focus
My recent work focuses on enhancing the coding agent capabilities of LLMs. Selected projects include:
2025.9~Present: Core contributor to the webdev capabilities for the Seed 2.0/2.1 Code model series. Collaborating with top-tier colleagues, we built a comprehensive optimization pipeline from scratch, driving continuous model improvements via mid-training & SFT data synthesis, with a strong focus on web RL scaling.
2025.2~2025.8: Led the development of SWE-Swiss, a 32B open-weight model that achieves top-tier performance on SWE-bench Verified. [Notion] [code]
Awards
2023-2024: Presidential Scholarship (the highest doctoral research honor at Peking University)
Professional Services
Reviewer for
ICML 2024, 2025, 2026
NeurIPS 2024, 2025
ICLR 2025, 2026
COLM 2024