Professional Experience

NAVER CLOUD

Server Developer / AI Researcher | 2023 – Present

• Server-side development for Cloud Storage services ( NAVER WORKS / LINE WORKS )

• Detection of AI Generated Image 

• OCR Server development

WORKSMOBILE

Server Developer | 2020 – 2023

• Server-side development for NAVER WORKS / LINE WORKS

• Development related to Cloud Storage and Drive services (2021)

NEOWIZ

Game Server Developer | 2017 – 2020

• Backend development for mobile and online games ( Pmang Poker, Matgo, etc ) 

• Backend engineering for multiple games under the Voyager project

• Participation in an IDC-to-AWS migration project (2020)

Education

Yonsei University, Seoul, South Korea

Master of Science (M.S.) in Computer Science | 2015 – 2017

• Internet Computing Laboratory

• Master's Thesis: Operator Planning for Distributed Processing of RDF Streams

• Thesis (RISS)

Yonsei University, Seoul, South Korea

Bachelor of Science (B.S.) in Computer Science | 2011 – 2015

Publications

# 2027

CC-PNR: Class-Conditional Phase-Noise Recovery for Generalizable AI-Generated Image Detection (Accepted)

Seungjun Yoon, Jinwoo Kong, Hyungjun Park

• Winter Conference on Applications of Computer Vision (WACV) 2027, Algorithm Track

• First Author

• Accepted in 2026

• link (coming soon) 

# 2019 

SECoG: Semantically Enhanced Mashup of CoAP-based IoT Services

Xiongnan Jin, Jooik Jung, Sejin Chun, Seungjun Yoon and Kyong-Ho Lee

• Service Oriented Computing and Applications (SOCA)

• Vol. 13, No. 1, pp. 81-94, 2019

• Co-author

Planning Operators of Concurrent RDF Stream Processing Queries

Sejin Chun, Seungjun Yoon, Jooik Jung, Kyong-Ho Lee

• International Journal of Web and Grid Services (IJWGS)

• Vol. 15, No. 1, pp. 93–117, 2019

• Co-author

• DOI / Publication

# 2016

A Unified Interface for Optimizing Continuous Query in Heterogeneous RDF Stream Processing Systems

Seungjun Yoon, Sejin Chun, Xiongnan Jin, Kyong-Ho Lee

• International Semantic Web Conference (ISWC) 2016, Posters & Demonstrations Track

• First Author

• Paper (PDF)

Proactive Replication of Dynamic Linked Data for Scalable RDF Stream Processing

Sejin Chun, Jooik Jung, Xiongnan Jin, Seungjun Yoon, Kyong-Ho Lee

• International Semantic Web Conference (ISWC) 2016, Posters & Demonstrations Track

• Co-author

• Paper (PDF)

Projects

2016 | Cloud-based Service Platform for IoV Data Storage and Analysis

• Research and development related to cloud-based storage and analysis of Internet of Vehicles data

• Sponsored by the Ministry of Science, ICT and Future Planning, South Korea

2015 | Semantic Services and Technologies for Realizing a Zero-Energy Community

• Research on semantic technologies and services for zero-energy communities

• Sponsored by the Electronics and Telecommunications Research Institute (ETRI)

Technical Skills

Programming Languages

Kotlin · Java · Python · C · C++ · C#

Backend & Infrastructure

Spring Framework · AWS · Microservices · Game Server Development · Cloud Storage

Research & Data Technologies

Semantic Web · RDF Stream Processing · SPARQL Query Optimization · Distributed Processing · Ontology · Domain Integration · Internet of Things

Other Tools & Platforms

Android · Arduino · Adobe Photoshop · Adobe Illustrator

Honors & Awards

• 2024 — N INNOVATION AWARD Sharing Lessons Learned (NAVER)

• 2016 — NAVER Research Scholarship Award

• 2010 — Korea Mathematics Competition (KMC), Final Round, Merit Award

• 2003 — Korea Olympiad in Informatics, Incheon Preliminary Round, Bronze Award

Leadership & Activities

Yonsei Michuhol Family (Y.M.F.) | 2011 – 2012

• Representative of Yonsei University's Incheon regional student community

ADCUS — Yonsei University Advertising Club | 2012

• 18th cohort, Design Team

• Participated in advertising magazine production and an advertising exhibition