Jabin Koo

Jabin Koo 구자빈

Integrated PhD student, Department of Computer Science and Engineering
Pohang University of Science and Technology (POSTECH), Pohang, South Korea

jbkoo@postech.ac.kr · Google Scholar · CV (PDF)

About

I am an integrated PhD student in the Department of Computer Science and Engineering at Pohang University of Science and Technology (POSTECH), where I am a member of the Machine Learning Laboratory and am advised by Prof. Jungseul Ok.

My research interests lie in machine learning, federated learning, and large language models. I am currently focused on efficient computation and personalization in distributed large language model systems, particularly through mixture of experts and multi-agent systems.

Education

Publications

  1. Federated Variational Preference Alignment with Gumbel–Softmax Prior for Personalized User Preferences
    Jabin Koo, Hoyoung Kim, Minwoo Jang, Jungseul Ok
    ICML 2026 · Project · arXiv
  2. Making Models Unmergeable via Scaling-Sensitive Loss Landscape
    Minwoo Jang, Hoyoung Kim, Jabin Koo, Jungseul Ok
    ICML 2026 · Project · arXiv
  3. ChimeraLoRA: Multi-Head LoRA-Guided Synthetic Datasets
    Hoyoung Kim, Minwoo Jang, Jabin Koo, Sangdoo Yun, Jungseul Ok
    CVPR 2026 · Project · arXiv
  4. Towards Robust and Efficient Federated Low-Rank Adaptation with Heterogeneous Clients
    Jabin Koo*, Minwoo Jang*, Jungseul Ok (*equal contribution)
    ACL 2025 — Oral · Project · arXiv
  5. Fast Personalized Pruning in Federated Learning
    Hoyoung Kim*, Jabin Koo*, Jinwoo Jeon, Namhoon Lee, Jungseul Ok (*equal contribution)
    KAIA Summer 2022 — Best Paper Award

Patents

Awards

Academic Service

Reviewer

Teaching Experience