Education
POSTECH — Integrated M.S./Ph.D., Computer Science
Data Systems Lab (advisor: Prof. Wook-Shin Han)
POSTECH — B.S., Computer Science
Summa Cum Laude (GPA 4.11 / 4.30)
Hyundai Chungun High School
Publications
Failure is Feedback: History-Aware Backtracking for Agentic Traversal in Multimodal Graphs
LILaC: Late Interacting in Layered Component Graph for Open-domain Multimodal Multihop Retrieval
HELIOS: Harmonizing Early Fusion, Late Fusion, and LLM Reasoning for Multi-Granular Table-Text Retrieval
ReCG: Bottom-Up JSON Schema Discovery Using a Repetitive Cluster-and-Generalize Framework
KDD Cup Meta CRAG 2024 Technical Report: Three-Step Question-Answering Framework
Work Experience
Visiting Researcher — New York University (NYU), New York, USA
- Joint research collaboration.
- Funded by Global AI Frontier Lab of IITP.
Full-Stack Developer (Intern) — SK hynix Inc., Icheon, South Korea
- Web interface manipulation via Selenium (Python).
- Server development using Spring Boot (Java).
- Frontend development using Node.js (JavaScript).
Honors & Awards
2026 Overseas Dispatch Program for Graduate Students (Long-term)
Funded for long-term international research visit program — POSTECH
2025 POSTECH Research Excellence Award
Department of Computer Science and Engineering — POSTECH
2025 POSTECH CSE Outstanding Paper Award
Department of Computer Science and Engineering — POSTECH
2025 BK POSTECHIAN Fellowship
BK21 Fellowship for outstanding graduate students — BK21
1st Place (Comparison & Post-processing Tests)
KDD Cup 2024: Meta CRAG Challenge (Team dRAGonRAnGers)
National Science & Technology Scholarship
Awarded to students with outstanding academic ability in science and engineering — South Korea
Global Leadership Program Scholarship
Awarded to outstanding students majoring in computer science — POSTECH
Global Leadership Program Scholarship
Awarded to outstanding students majoring in computer science — POSTECH
Patents
Subgraph Retrieval System Based on Layered Component Graph for Open-Domain Multimodal Document Retrieval
Korean Patent Application — No. 10-2025-0195617
- Han, W. and Yun, J.
Apparatus and Method for Table and Document Retrieval Based on Questions
PCT International Application — No. PCT/KR2025/003037
- Han, W., Park, S., Yun, J., and Lee, J.
AI Technology for Predicting On-site Safety Accidents in Hazardous Chemical Facilities
Korean Patent Application — No. 10-2024-0167340
- Han, W., Ha, J., and Yun, J.
Teaching Experiences
Teaching Assistant — Design of Digital System (CSED273), POSTECH
Teaching Assistant — Advanced Machine Learning, Samsung Electronics
Under Data Systems Lab program.
Teaching Assistant — Data Processing, Distributed Database & Deep Learning, Samsung Electronics
Under Data Systems Lab program.
Skills
- Korean (native)
- English (fluent)
- Japanese (fluent)
- Python
- C++
- LaTeX