Seokchanย Yoon
Security Researcher at Zellic
Seoul, South Korea
Summary
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Top SchoolSeokchan Yoon is a security researcher with nine years of hands-on experience in offensive security, vulnerability research, and competitive CTFs, currently working at Zellic in Seoul. A repeat finalist at DEF CON CTF and multiple national contests, he pairs deep exploit skills with practical bug bounty achievements across major platforms including NAVER and a disclosed Django CVE. He has industrial research experience from STEALIEN and a defense research posting during military service, blending academic CSE study at Kyung Hee University with applied security work. Known for contributing fixes and proofs-of-concept across web frameworks and languages (Python/Django, Ruby, Java Spring), he brings both rapid vulnerability discovery and polished remediation guidance. Less obvious: his long track record of youth competition wins reflects an early, sustained focus on creative problem solving under pressure.
9 years of coding experience
Bachelor of Science Computer Engineering, Bachelor of Science Computer Engineering at Kyung Hee UniversityDepartment of Hacking Defense, Department of Hacking Defense at Korea Digital Media High School
Github Skills (38)
programming-language10
python10
django10
api10
rest10
django-rest-framework9
rest-api9
sqlalchemy6
jinja26
highlight6
xml5
xslt5
fastapi4
cms4
orm3
Programming languages (5)
Github contributions (5)
stealien/stealien.github.io
Dec 2020 - Dec 2022
stealien.github.io
Contributions:128 commits, 1 PR, 84 pushes in 2 years
ch4n3-yoon/CTFs
Aug 2017 - Mar 2020
Contributions:9 commits, 8 pushes, 1 branch in 2 years 7 months
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