Junjielong Xu is a Ph.D. candidate of Computer Science in the School of Data Science at The Chinese University of Hong Kong, Shenzhen (CUHK-SZ). His supervisor is Prof. Pinjia He. Before joining CUHK-SZ, he received his BEng degree from the School of Electronic Information and Communication at Huazhong University of Science and Technology (HUST) in 2022.

🔎 His research focuses on LLM-based DevOps automation for enhancing reliability of code and services, particularly in the areas of (1) logging and root cause analysis (RCA) (2) debugging and automated program repair (APR). He is also interested in recent LLM research topics such as scalable oversight and test-time scaling.

🔑 His objective is to provide non-trivial insights into AI models to address impactful challenges in real-world SE scenarios. He is trying hard to work toward this and hopes to conduct interesting yet meaningful research one day. 🫨

😊 He is currently looking for visiting or internship opportunities. Feel free to reach out if you are interested and would like to discuss ideas or collaborate on research project.

P.S. My name “Junjielong Xu” is written as “徐俊杰龙” in Chinese, and is pronounced like “Joon-jyeh-long Shoo.”

🔥 News

2025.03: 🎉🎉 I served as Art Design Chair for FSE’26.
2025.01: 🎉🎉 I served as Program Committee for FSE’25 industry track.
2025.01: 🎉🎉 One first-authored paper was accepted by ICLR’25.
2024.10: 🎉🎉 One first-authored paper was accepted by ICSE’25.
2024.03: 🎉🎉 I served as Shadow Program Committee for ICSE’25.

📝 Publications

ICLR’25 OpenRCA: Can Large Language Models Locate the Root Cause of Software Failures?

Junjielong Xu, Qinan Zhang, Zhiqing Zhong, Shilin He, Chaoyun Zhang, Qingwei Lin, Dan Pei, Pinjia He, Dongmei Zhang, Qi Zhang.

International Conference on Learning Representations, Singapore, April 2025.

[paper] [code]
ICSE’25 Aligning the Objective of LLM-based Program Repair

Junjielong Xu, Ying Fu, Shin Hwei Tan, Pinjia He.

International Conference on Software Engineering, Ottawa, April 2025.

[paper] [code]
ICSE’24 DivLog: Log Parsing with Prompt Enhanced In-Context Learning

Junjielong Xu, Ruichun Yang, Yintong Huo, Chengyu Zhang, Pinjia He.

International Conference on Software Engineering, Lisbon, April 2024.

[paper] [code]
ICSE’24 UniLog: Automatic Logging via LLM and In-Context Learning

Junjielong Xu, Ziang Cui, Yuan Zhao, Xu Zhang, Shilin He, Pinjia He, Liqun Li, Yu Kang, Qingwei Lin, Yingnong Dang, Saravan Rajmohan, Dongmei Zhang

International Conference on Software Engineering, Lisbon, April 2024.

[paper] [code]
FSE’23 Hue: A User-Adaptive Parser for Hybrid Logs

Junjielong Xu, Qiuai Fu, Zhouruixing Zhu, Yutong Cheng, Zhijing Li, Yuchi Ma, Pinjia He.

International Conference on the Foundations of Software Engineering, San Francisco, December 2023.

[paper] [code]

🎖 Honors and Awards

2024.04 💰Duan Yong Ping Travel Award, CUHK-Shenzhen (¥10,000)
2023.12 🥉3rd Prize, CCF International AIOps Challenge (Ranked 🏅1st among student teams)
2020.10 🏅1st Prize, China Undergraduate Mathematical Contest in Modeling (CUMCM) (🤺Leader)
2020.04 🏆Finalist Prize, Mathematical Contest In Modeling (MCM) (🤺Solo)

💬 Service

Journal

Reviewer, TSE, TOSEM

Conference

Art Design Chair: FSE’26
Program Committee: FSE’25 (industry-track), ICSE’25 (shadow-PC)
Artifact Evaluation Committee: ICSE’25, ISSRE’24

💻 Internships

2023.12 - 2024.09, Microsoft DKI Team, researcher.
2023.05 - 2023.09, Huawei Cloud PaaS Lab, researcher.
2021.06 - 2021.08, Tencent IEG User Platform, engineer.

📖 Educations

2022.09 - 2026.06 (now), Ph.D. in Computer Science, The Chinese University of Hong Kong, Shenzhen.
2018.09 - 2022.06, B.Eng. in Electronic Information Engineering, Huazhong University of Science and Technology.

📐 Teaching

Teaching Assistant @CUHK-SZ

2025.02 - CSC4001 Software Engineering
2024.09 - CSC1001 Python Programming
2024.02 - CSC4001 Software Engineering
2023.02 - CSC4001 Software Engineering
2022.09 - CSC1003 Java Programming