Education, publications, experience, talks and skills.
Education
- Sep. 2024 – Present — Seoul National University (SNU), M.S./Ph.D. in Intelligence and Information
- Advisor: Prof. Jung Ho Ahn (SCALE lab)
- Sep. 2022 – Feb. 2023 — Research intern at SAFARI, ETH Zürich
- Feb. 2022 – Aug. 2022 — Exchange program, ETH Zürich
- Feb. 2019 – Aug. 2024 — Seoul National University (SNU), B.S. in Electrical and Computer Engineering
Publications
- Younjoo Lee, Seungkyun Dan, Junghoo Lee, Jaiyoung Park, Jung Ho Ahn. DyLLM: Efficient Diffusion LLM Inference via Saliency-Based Token Selection and Partial Attention. ICML. 2026
- Gunjun Lee, Jiwon Kim, Jaiyoung Park, Younjoo Lee, Jung Ho Ahn. From Tokens to Layers: Redefining Stall-Free Scheduling for LLM Serving with Layered Prefill. MLSys. 2026
- Hyungyo Kim, Qirong Xia, Jinghan Huang, Nachuan Wang, Younjoo Lee, Jung Ho Ahn, Wajdi K Feghali, Ren Wang, Nam Sung Kim. LiLo: Harnessing the on-Chip Accelerators in Intel CPUs for Compressed LLM Inference Acceleration. HPCA. 2026
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Robin Fritsch, Younjoo Lee, Adrian Meier, Ye Wang, Roger Wattenhofer. Understanding the Relationship between Core Constraints and Core-Selecting Payment Rules in Combinatorial Auctions. IJTCS-FAW. 2023
- Nominated for Best Paper
Experience
- Google TPU Builder Program — Apr. 2026 – Present
- Built efficient diffusion LLM framework (DyLLM) on TPU using PyTorch XLA and Pallas kernels in TPU Sprint.
- GPU/HPC Server Administration, SCALE lab — Sep. 2024 – Present
- Plan and configure GPU/HPC server specifications based on workload requirements, including motherboard, PSU, GPU, CPU, memory, storage, cooling, etc.
- Troubleshoot server, software, environment, and network issues.
- Set up and maintain servers.
- Safari research internship, ETH Zürich — Sep. 2022 – Feb. 2023
- Project name: ‘Comprehensive characterization and optimization of seeding algorithms on modern FPGAs’
- Implemented and accelerated various seeding algorithms on a full read-mapping FPGA/CPU pipeline and evaluated their accuracy, performance, etc. on 3 major read types (ONT, HiFi, Illumina).
- Developed HLS kernels, tested on a real Alveo U55C FPGA provided through the Xilinx HACC program.
- Teacher of Project & Seminar course at ETH: Sep. 2022 – Dec. 2022.
- LikeLion 8th (2020), Wafflestudio (2021) — web service engineering clubs in SNU
- Launched a social network web service for tracking users’ reading activity on their own online bookshelf using the Django framework on AWS Elastic Beanstalk.
Academic Services
- Reviewer, IEEE Transactions on Computers (TC), 2026
- Artifact Evaluation Reviewer, HPCA, 2026
Skills & Languages
- CUDA/C++, PyTorch/XLA, FPGA HLS, GPU/HPC server maintenance
- Languages: Korean (native), English (fluent)
Projects
- DyLLM on TPU (2026)
Leadership and Awards
- Cheongpa Scholarship (2025, 2026)
- Seoul National University varsity Tennis Team
- President, SNU Engineering Tennis Club
- Held several tennis tournaments in SNU.