🤔 About Me

I’m currently a second year master student in the Department of Computer Sciecne & Engineering at UC San Diego.

My current interest centers around how to build self-evolving agents that are capable of handling complex, long-running tasks, and how to build the infrastructure to efficiently serve them.

Previously, I’ve also worked on Recommender Systems and Automated Software Engineering.

📖 Educations

• 2024.09 - 2026.03, M.S. in Computer Science, UC San Diego (La Jolla, California, USA)
• 2020.09 - 2024.06, B.Eng. in Software Eng., Nanjing University (Nanjing, China)

💻 Industry Experiences

• 2025.06 - 2025.09, Software Engineer Intern (Agentic AI) @ Amazon Web Services, Seattle, USA.
• 2023.06 - 2023.09, Software Engineer Intern (Search Infra) @ Meituan, China.
• 2022.07 - 2022.08, Software Engineer Intern (Web Dev.) @ Howmet Aerospace (Suzhou), China.

🧑‍🎓 Research Experiences

• 2025.10 - 2025.12, Research Intern (RAG Systems) @ UCSD WukLab, La Jolla, USA
• 2024.07 - 2025.06, Independent Researcher (Recommender Systems) @ UCSD, La Jolla, USA
• 2022.09 - 2023.05, Research Intern (Automated Software Engineering) @ Nanjing University, China.

📝 Selected Publications

^† These authors contributed equally. ^* Corresponding author.

• Difficulty-Aware Agentic Orchestration for Query-Specific Multi-Agent Workflows

  Jinwei Su, Qizhen Lan, Yinghui Xia, Lifan Sun, Weiyou Tian et al.

  WWW 2026

• SOLAR: Serendipity Optimized Language Model Aligned for Recommendation

  Zichen Yuan^†, Lifan Sun^†, Yucen Zhuang, Yue Wang, Xinyuan Song, Youhua Li^*, Yongxin Ni^* et al.

  EMNLP 2025 Findings

• AMBER: Adaptive Meta Balanced Paradigm for Heterogeneous Graph-Based Knowledge Tracing

  Lifan Sun^†, Zichen Yuan^†, Ersheng Ni, Weihua Cheng, Xinyuan Song, Youhua Li^* et al.

  CIKM 2025

• Towards Effective Bug Reproduction for Mobile Applications

  Xin Li^†, Shengcheng Yu^†, Lifan Sun, Yuexiao Liu, Chunrong Fang^*.

  DSA 2023 🏅 Best Paper Award

🧑‍💼 Services

• Reviewer: TKDD

🎖 Honors and Awards

• People’s Scholarship of Nanjing University, 2021, 2022, 2023
• Best Paper Award at International Conference on Dependable Systems and Their Applications, 2023

🎮 Misc

In my free time, I enjoy anime, J-pop music, video games, and wandering around the city.