Mar 2023 - Present
B.S. in Computer Engineering, College of Engineering
Education
Mar 2020 - Jan 2023
Diploma in Computer Networking
Experience
Sep 2021 - Mar 2023
AI Team / Software Engineer
Fellowships
Jul 2025 - Feb 2026
Next-Generation Security Leader Program / Security Product Development Track
Mar 2024 - Sep 2024
Next-Generation Security Leader Program
Apr 2023 - Dec 2023
Advanced Software Talent Development Program / Cohort Representative
Projects
Aug 2026 - Present
Team project / Live production service / Game
- Built a chat-based online Mafia game server with abilities for 14 roles, voting, and win-condition evaluation
- Separated public and per-user private events, with message validation and game-state updates in the React/TypeScript client
- Used Redis locks for room updates and database pessimistic locks and uniqueness constraints to handle concurrent requests and duplicate game actions
- Connected web and app login flows through Google OAuth, deep links, and secure token storage in the Capacitor Android app
- Achievement: Launched the web service and released the Android app on Google Play
Apr 2026 - Present
Team project / Live production service / Full-stack, AI
- Used DOMjudge judgehosts as the execution engine, implemented task-assignment and result-collection APIs, and delivered live judging progress through SSE
- Implemented user management with HUFS SSO, Redis-backed sessions, and student/instructor/administrator permissions
- Separated the Spring Boot backend from the FastAPI/Ollama inference server and processed AI code feedback asynchronously with Redis/RQ queues and callbacks
- Excluded private test-case contents from model input and added response-format validation, usage limits, and fallback responses
- Achievement: Operated the algorithm learning platform with the Department of Computer Engineering and the Office of Information Technology to support programming courses and HUFS CODE FESTIVAL
Sep 2020 - Present
Personal project / Live production service / Full-stack, Android, AI
- Changed ranking queries to read precomputed results instead of recalculating the full dataset on each request
- Built an AI feature that analyzes game replays and posts gameplay feedback as comments
- Developed the Daehyun.com Android app and released it on Google Play
- Configured blue-green deployment to switch Nginx traffic after checking the new container's health
- Operated an advertising-supported service with Google AdSense and in-house ad management, improving features based on user feedback
- Achievement: Reached 3,100+ registered users and 4,400+ MAU, and achieved profitability
Sep 2025 - Dec 2025
Best of the Best 14th team project / Open source
- Linked AWS asset snapshots with CloudTrail events to track asset changes and identify the actors involved
- Evaluated S3/RDS configuration changes against YAML policies to classify their risk
- Scored user-activity features with Mahalanobis distance and displayed the main features contributing to each score
- Achievement: Published a paper at the CISC-W'25 Conference of the Korea Institute of Information Security & Cryptology
May 2024 - Jul 2025
Whitehat School 2nd cohort team project / Open source
- Developed an OSINT tool to check whether public accounts with a given username exist on Korean community platforms
- Managed site-specific URLs and account-not-found rules in JSON, filtering results by HTTP status codes and response text
- Released the source code under the MIT license and provided a Docker runtime
May 2023 - Nov 2023
Software Maestro 14th cohort team project / Live production service / Backend
- Implemented group and schedule management APIs with Kotlin/Spring
- Retrieved events through the Google Calendar API and synchronized them with service schedules through a periodic job
- Automated Gradle builds, Docker image creation, and registry pushes with GitHub Actions
Publications
Korea Institute of Information Security & Cryptology CISC-W'25 Conference / First Author
Vulnerability reporting
Oct 2026
Sep 2026
Sep 2026
Aug 2026
Aug 2026
Jun 2026
Jun 2026
Certifications
Google AI Professional Certificate
YK7F8V3NM69Q
TOEIC Speaking IM3
TOEIC
2025 Daangn Builder's Camp
Karrot
Oracle Cloud Infrastructure Foundations Associate
Oracle
296732356OCI25FNDCFA
TOPCIT Level 3
Institute of Information & Communications Technology Planning & Evaluation
Industrial Engineer Information Processing
Human Resources Development Service of Korea
22251020182F
Awards
Grand Prize, 13th Bring Your Own Idea Competition (HUFS President's Award)
Hankuk University of Foreign Studies
Outstanding Project Award, Spring 2026 Capstone Design
Department of Computer Engineering, Hankuk University of Foreign Studies
Outstanding Project Award, 1st G-RISE Capstone Design Competition
HUFS G-RISE Project Group
Grand Prize, 3rd HUFSummer Hackathon (HUFS President's Award)
Hankuk University of Foreign Studies
Excellence Award, 2nd HUFSummer Hackathon (Dean of Engineering Award)
Hankuk University of Foreign Studies
Community & Leadership
2023 - 2026
- 8th Cohort Senior Core Member
- 7th Cohort Organizer
- Led developer community operations and event planning
- Core Member, 6th and 5th Cohorts
- Supported developer community operations
2023 - 2025
HUFS AI Education Center & Google Developer Groups on Campus HUFS
- Competition Director, 7th HUFS CODE FESTIVAL (Nov 2025)
- Built a self-hosted, on-premise competition platform
- Led end-to-end competition planning and operations
- Managed the problem-setting and review process
- Problem Setter, 6th and 5th HUFS CODE FESTIVAL (Oct 2024 / Nov 2023)
- Authored and reviewed competition problems
Jul 2023
- Mentored student teams in refining project ideas and defining development direction for an industry-academia apprenticeship program
- Helped resolve technical issues in web and game programming implementations