Katherine Tieu

I'm a first-year CS PhD of iSAIL Lab at University of Illinois Urbana-Champaign (UIUC), advised by Prof. Jingrui He. Currently, I am a Research Scientist Intern at Meta .

I am interested in (1) LLM post-training, specifically in Alignment and Efficiency; (2) Agentic AI systems, particularly in designing Multi-agent Systems; and (3) Graph Machine Learning, where I had previously worked on temporal graphs.

Email / Google Scholar / X / LinkedIn / Github

Selected Publications (Full list)

(* denotes equal contribution)

Code as Agent Harness
Xuying Ning*, Katherine Tieu*, Dongqi Fu*, Tianxin Wei*, Zihao Li*, Yuanchen Bei*, Jiaru Zou, Mengting Ai, Zhining Liu, Ting-Wei Li, Lingjie Chen, Yanjun Zhao, Ke Yang, Bingxuan Li, Cheng Qian, Gaotang Li, Xiao Lin, Zhichen Zeng, Ruizhong Qiu, Sirui Chen, Yifan Sun, Xiyuan Yang, Ruida Wang, Rui Pan, Chenyuan Yang, Dylan Zhang, Liri Fang, Zikun Cui, Yang Cao, Pan Chen, Dorothy Sun, Ren Chen, Mahesh Srinivasan, Nipun Mathur, Yinglong Xia, Hong Li, Hong Yan, Pan Lu, Lingming Zhang, Tong Zhang, Hanghang Tong, Jingrui He

Preprint, 2026

pdf / code / webpage / HF Paper

Learnable Spatial-Temporal Positional Encoding for Link Prediction
Katherine Tieu*, Dongqi Fu* Zihao Li, Ross Maciejewski, Jingrui He

ICML, 2025

pdf / code

Invariant Link Selector for Spatial-Temporal Out-of-Distribution Problem
Katherine Tieu, Dongqi Fu, Jun Wu, Jingrui He

AISTATS, 2025

pdf / code

Temporal Graph Neural Tangent Kernel with Graphon-Guaranteed
Katherine Tieu*, Dongqi Fu*, Yada Zhu, Hendrik Hamann, Jingrui He

NeurIPS, 2024

pdf / code

Experience

Meta AI
Research Scientist Intern, May 2026 - Aug 2026
Meta MRS
Mentors: Dr. Si Zhang, Dr. Dongqi Fu

Academic Service

Conference PC Member:

2025: NeurIPS, LOG
2023: IEEE BigData

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