PhD Candidate in Computer Science
National University of Singapore
I am a Ph.D. candidate in Computer Science at the National University of Singapore (NUS). I'm jointly advised by Prof. Jin Song Dong at the Programming Languages and Software Engineering (PLSE) Lab at NUS, and by Prof. Yun Lin at the CoPhi Research Group at Shanghai Jiao Tong University (SJTU).
My research addresses a core challenge in human-agent interaction: how to make software agents capable and reliable in real-world digital environments. I design agents that reason about graphical user interfaces by grounding visual information in structured representations. I apply this work to Internet security and software testing, where agents help detect threats, uncover bugs, and verify that interfaces behave as intended.
* co-first author
ACM SIGSAC Conference on Computer and Communications Security (CCS 2026)
Ruofan Liu, Yun Lin, Yuxin Wang, Xiwen Teoh, Zhenkai Liang, Gongshen Liu, Haojin Zhu, Jin Song Dong
International Symposium on Software Testing and Analysis (ISSTA 2026)
Weiyu Kong, Yun Lin, Xiwen Teoh, Duc-Minh Nguyen, Ruofei Ren, Jiaxin Chang, Haoxu Hu, Haoyu Chen
International Conference on Software Engineering (ICSE 2026)
Wenjie Zhang, Yun Lin, Chun Fung Amos Kwok, Xiwen Teoh, Xiaofei Xie, Frank Liauw, Hongyu Zhang, Jin Song Dong
International Conference on the Foundations of Software Engineering (FSE 2026)
Xiwen Teoh, Yun Lin, Duc-Minh Nguyen, Ruofei Ren, Wenjie Zhang, Jin Song Dong
USENIX Security Symposium (USENIX Security 2025)
Xiwen Teoh, Yun Lin, Siqi Li, Ruofan Liu, Avi Sollomoni, Yaniv Harel, Jin Song Dong
International Symposium on Software Testing and Analysis (ISSTA 2025)
Ruofan Liu*, Xiwen Teoh*, Yun Lin, Guanjie Chen, Ruofei Ren, Denys Poshyvanyk, Jin Song Dong
International Conference on Automated Software Engineering (ASE 2024)
Yifan Liao, Ming Xu, Yun Lin, Xiwen Teoh, Xiaofei Xie, Ruitao Feng, Frank Liauw, Hongyu Zhang, Jin Song Dong
USENIX Security Symposium (USENIX Security 2024)
Xiwen Teoh, Yun Lin, Ruofan Liu, Zhiyong Huang, Jin Song Dong
USENIX Security Symposium (USENIX Security 2024)
Ruofan Liu, Yun Lin, Xiwen Teoh, Gongshen Liu, Zhiyong Huang, Jin Song Dong
PhD, Computer Science
National University of Singapore
BE, Computer Science
Shanghai Jiao Tong University
Research Assistant
National University of Singapore
Towards Trustworthy GUI Agents via Neuro-Symbolic Reasoning
The First Global PhD Student Forum for Interdisciplinary and Innovative Research, Jiao Chuang Forum, Shanghai Jiao Tong University
Teaching Assistant
National University of Singapore
Mentor for Siqi Li (NUS Undergraduate Researcher)
National University of Singapore
Reviewer
ACM The Web Conference (WWW)
Reviewer
International Sports Analytics Conference and Exhibition (ISACE)
ACM Professional Membership
First Prize
Prototype System Competition, CCF ChinaSoft
Research Achievement Award
National University of Singapore, AY2025/2026 Semester 1
Silver Medal
China International College Students’ Innovation Competition (CICSIC)
Gold Medal
China International College Students’ Innovation Competition, Southeast Asia (SEA-CICSIC)
Silver Medal
China International College Students’ Innovation Competition, Shanghai Division (CICSIC)
NUS Research Scholarship
National University of Singapore
Shanghai Government Scholarship
Shanghai Municipal Government
National Top 10, Computing and Information Technology
Unified Examination Certificate (UEC), Malaysia