Haojian Jin

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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 am recruiting three PhD students to join my group in Fall 2027, focusing on building and deploying usable systems. You do not need to contact me before applying. Please select my name in the HDSI/CSE application portal. If you would like to get in touch, please read this page first.

I am also seeking postdocs, as well as master’s and undergraduate students. Please refer to the prospective page.