PhD in Computer Science (Machine Learning), Georgia Institute of Technology, 2015
Masters in Computer Science, Georgia Institute of Technology, 2011
Bachelor's in Computer Science and Engineering, Seoul National University, South Korea, 2009
Exchange Program, Stanford University, 2008
Scalable Intelligence Research (Managers: Misha Bilenko / Rob Fergus / Manohar Paluri)
Developing scalable solutions to core challenges in modern LLMs, including representations, long-context modeling, grounded generation and efficient reasoning
Leading a team of 3 researchers
Gemini Memory Research (Manager: Rob Fergus)
Advancing fundamental techniques to scale long-context capabilities and enable efficient, grounded generation
Leading a team of 4 researchers
Impacts
Won Google-wide Tech Impact Award 2025 (Speculative Decoding; awarded after moving to Meta)
World #1 in retrieval benchmark leaderboard (MTEB, December 2024)
Critical contributor for Gemini 2.0/2.5 efficiency (rewarded by Gemini leads)
[Gemini 2.5 Tech Report], 2 patents, and multiple launches in Google applications
SWEFF/FLOS (ML Efficiency & Scalability, Manager: Sanjiv Kumar)
Developing techniques for efficient LLM scaling, including model cascades, fast decoding, distillation, and large-scale retrieval
Impacts
Won Google-wide Tech Impact Award 2024 from critical contribution to Gemini Chat 1.0
4 patents, additional performance impact awards, and bonuses
Won Research Tech Award 2024 from significant impact in YouTube Ads with ML modeling
Led 9 projects, 26 launches involving 30+ people from 5 teams
Significant contribution to YouTube Search
Led 10+ launches in YouTube Search ML, multiple bonuses from the impact
Google Research (L4, 2015-2017)
Neon (Manager: Devon Proctor under Jakob Uszkoreit)
Developing contextualized decoding as a novel, privacy-preserving on-device ML approach for Google Keyboard
1 patent
Google-wide Tech Impact Award 2024 and 2025 -- granted only to 10 high impact projects in entire Google
Outstanding Paper Honorable Mention [ICLR 2025]
Best Student Paper Award World Wide Web Conference [WWW 2014]
Kwanjeong Educational Foundation Scholarship (highly competitive scholarship) 2011-2015
University Fellowship, Seoul National University, all semesters 2002-2009
See publications [here]