haojian@ucsd.edu
office: HDSI 341
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I'm an Assistant Professor in Halıcıoğlu Data Science Institute (HDSI) and Department of Computer Science and Engineering (affiliate) at UC San Diego.
I am a human-centered systems researcher, so most of my work ends in a system people can actually use. My research lies at the intersection of human-computer interaction, privacy and security, and data science, exploring topics such as:
- All aspects of data privacy, e.g., developer privacy, usable privacy, architecture, mechanism design, hardware.
- Applications of LLM-based simulation in data science.
- Rigorous and usable methods for evaluating AI systems.
Updated 09/29/2026:
I plan to recruit three PhD students who are interested in building and deploying usable systems, starting in Fall 2027. I am also seeking postdocs, and master’s and undergraduate students. If you want to reach out, please read this page first.