Sangjin Choi

Education

Sep 2021 - Aug 2026
Ph.D., School of Computing, KAIST Advisor: Youngjin Kwon
Sep 2019 - Aug 2021
M.S., School of Computing, KAIST Advisor: Youngjin Kwon
Mar 2015 - Aug 2019 B.S., School of Computing, KAIST

Sep 2026 - Present
Postdoctoral Researcher, Information & Electronics Research Institute CASYS Lab, KAIST
Mar 2026 - May 2026
Research Intern, Vancouver Lab Microsoft Research Asia Mentor: Yifan Xiong
Jul 2025 - Jan 2026
Research Intern, Systems and Networking Research Group Microsoft Research Asia Mentors: Yifan Xiong and Ziyue Yang

ACM ATC '26

ELDR: Expert-Locality-Aware Decode Routing for PD-Disaggregated MoE Serving

Sangjin Choi, Sukmin Cho, Yifan Xiong, Ziyue Yang, Youngjin Kwon, Peng Cheng

Paper

MLSys '26

BEAM: Joint Resource–Power Optimization for Energy-Efficient LLM Inference under SLO Constraints

Hyunjae Lee, Sangjin Choi, Seungjae Lim, Youngjin Kwon

Paper

EuroSys '26

MTTM: Dynamic Fast Memory Partitioning with Bandwidth Optimization for Multi-tenant Cloud

Changjun Lee, Sangjin Choi, Youngjin Kwon

Paper

Findings of NAACL '25

Lossless Acceleration of Large Language Models with Hierarchical Drafting based on Temporal Locality in Speculative Decoding

Sukmin Cho, Sangjin Choi, Taeho Hwang, Jeongyeon Seo, Soyeong Jeong, Huije Lee, Hoyun Song, Jong C. Park, Youngjin Kwon

Paper

ICCAD '23

PRIMO: A Full-Stack Processing-in-DRAM Emulation Framework for Machine Learning Workloads

Jaehoon Heo, Yongwon Shin, Sangjin Choi, Sungwoong Yune, Jung-Hoon Kim, Hyojin Sung, Youngjin Kwon, Joo-Young Kim

Paper

USENIX ATC '23

EnvPipe: Performance-preserving DNN Training Framework for Saving Energy

Sangjin Choi, Inhoe Koo, Jeongseob Ahn, Myeongjae Jeon, Youngjin Kwon

Paper

USENIX ATC '22

Memory Harvesting in Multi-GPU Systems with Hierarchical Unified Virtual Memory

Sangjin Choi*, Taeksoo Kim*, Jinwoo Jeong, Rachata Ausavarungnirun, Myeongjae Jeon, Youngjin Kwon, Jeongseob Ahn (*equal contribution)

Paper