Hi, I'm Hongyi (Tom) Chen
I am a Data Science undergraduate at CUHK-Shenzhen and completed a visiting program in Computer Science at UC Berkeley in Fall 2025. My work spans medical AI, large language model research, machine learning engineering, and intelligent data systems.
Education
The Chinese University of Hong Kong, Shenzhen
B.S. in Data Science and Big Data Technology
Sep 2023 – Present
University of California, Berkeley
Visiting Student, Computer Science
Aug 2025 – Dec 2025
Experience
Research
CardioFormer: Cardiac Sudden Death Prediction
Apr 2026 – PresentUndergraduate Researcher (Advisor: Prof. Joshua Zhou)
Developing a safe EHR-based decision policy for cardiac sudden death prediction.
SkinGPT-X: Medical Large Language Model
Dec 2025 – Apr 2026Undergraduate Researcher (Advisor: Prof. Joshua Zhou)
Built a medical LLM evaluation framework and a Self-Evolving Memory module.
Impact of Polysemanticity on Large Language Model Editing
Nov 2025 – Dec 2025Undergraduate Researcher (Advisor: Prof. Anant Sahai)
Studied collateral damage from neuron-level and layer-level editing in polysemantic LLMs.
Internships
MLE Intern
Jul 2026 – PresentCardinal Operations, Shanghai, China
Working on machine learning algorithms and applied modeling.
FinTech Intern
Jul 2025 – Aug 2025China Merchants Bank, Xiamen
Built a BERT-based fraud risk classifier with a 12% relative accuracy gain over XGBoost and used token-level SHAP for model analysis.
Data Analysis Intern
Apr 2025 – Jun 2025DigitSuper Technology
Improved bid win rate by 20% and ROAS by 10% through advertising-data analysis and A/B tests.
Leadership & Extracurricular
Project Lead, Zhixing Social Practice Program
Jun 2024 – Oct 2024Led survey data processing and feature engineering with Python and Pandas, applied K-Means clustering to identify four core user profiles, and delivered findings adopted by CUHK-Shenzhen for student engagement planning.
Co-Lead, Rural Revitalization Program
Aug 2024Led stakeholder interviews and primary data collection, structured qualitative findings through thematic analysis, and co-authored a report adopted by the local government and featured by local media.
Languages
Technical Skills
Programming & Web
Machine Learning & Data
Hobbies
- Soccer
- Marathon & Hiking
- Novels & Films
- Traveling