🤔 About Me

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

My current interest includes both algorithmic and system perspectives of AI systems, particularly on Agentic AI and LLM serving systems.

Previously, I’ve also worked on Recommender Systems and 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)

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.

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.

^† 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

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