A developer who builds shipped tools at the intersection of security, fullstack, and AI.
$ whoami Kim Jong Gun — FULLSTACK · SECURITY · AI $ ls ~/now junior_3rd-year/ likelion_fullstack-lead/ hedgehog_security-lab/ $ cat shipped.txt ClassFileAuto · likelion-sch.com · Hedgehog WebCTF — all shipped & in production
A course-material downloader for the campus LMS. Encrypts student credentials with RSA and never stores them — convenience without compromising security.
Recruiting, screening, education, and operations for a campus dev club — a real service running on a custom domain.
A hands-on web-CTF platform with six challenges I authored myself (SQLi, HTTP headers, obfuscation) plus operator write-ups.
An integrated workspace that pulls scattered lab collaboration out of KakaoTalk and Google Docs. Its first module turns seminar PDFs into a feedback canvas — location-based pin comments plus a Claude copilot for Korean academic editing, synced in real time and self-hosted.
If you need a fullstack developer who understands security, reach out.