Offline
- 🧗 Bouldering V7 @ Movement Santa Clara
- 🏃 Marathon 3:29:40 @ Columbus Marathon
- 💍 Husband of a talented researcher: Dr. Yao Ji
- 🐱 Father of three naughty cats: Oreo, Dove, Doggy
About Me
I am a Machine Learning Engineer on the AKI team at Apple, currently working on the LLM Summarizer of Siri. I earned my Ph.D. in Machine Learning at Purdue University supervised by Dr. David I. Inouye. My current work revolves around post-training techniques like SFT, RL, and Prompt Optimization.
Education and Experience
Machine Learning Engineer
Apple
Sep 2025 – Present
AKI Team @ Apple Service Engineering. Working on the LLM Summarizer (Gemini, AFM) using post-training techniques like SFT, RL, and Prompt Optimization.
Ph.D. in Machine Learning
Purdue University
Aug 2019 – May 2025
Robustness Machine Learning focusing on causal-inspired domain generalization, distribution learning, and RL application.
Interests
Foundation Models
SFT
RLHF / DPO
Prompt Optimization
Robustness Machine Learning
Featured Publications
(2026).
FedLOE: Federated Domain Generalization via Locally Overfit Ensemble.
TMLR 2026.
(2024).
Counterfactual Fairness by Combining Factual and Counterfactual Predictions.
NeurIPS 2024.
(2024).
Benchmarking Algorithms for Federated Domain Generalization.
ICLR 2024 Spotlight.
Recent News