Who Is Sejin Chun? Career and Background of nyam.pe.kr's Owner

Sejin Chun is a South Korean high school teacher and software engineer who runs the personal site nyam.pe.kr. The site presents him as a teacher at Seoul IT High School since March 2015, working in the Department of Network Security Solutions, with a prior engineering career spanning game development, embedded systems, surveillance software, and mobile app security. His background combines roughly 15 years of industry development work with a later move into secondary education.

Current Role: Teacher and Software Engineer

According to his site, Sejin Chun has been a teacher at Seoul IT High School since March 2015. His listed department is Network Security Solutions, which aligns with his earlier industry work in malware detection and app security.

The site also notes that he writes textbooks for the 2022 Revised Curriculum, specifically High School Computer System General. This suggests his current work blends classroom teaching with curriculum and textbook development.

Industry Career Before Teaching

His professional history on nyam.pe.kr covers four companies, each with a distinct technical focus.

SK planet (2012.12 – 2015.02)

Manager at the Platform Product Development Office, Store Technology Development Team. Projects listed:

• Auto Malware Scanning System (AMSS) (2012.12 – 2013.10) — malware detection for apps during T store registration
• Customized Android Emulator In-App Agent (2013.10 – 2014.01) — an Android app custom code injection solution
• WISHPOCKET Server (2014.01 – 2014.06) — a commercial big data parsing server
• AppGuard (2014.06 – 2015.02) — an anti-forgery solution for Android apps

LG CNS (2007.01 – 2012.03)

R&D Analyst at the Fusion Technology Group. Projects and recognition:

• USN Stack Development (2007.01 – 2008.04) — 802.15.4 MAC-based ZigBee
• Intelli-VMS (2008.05 – 2012.03) — U-City CCTV integrated control and intelligent surveillance solution
• LG R&D Award (2012.03.07)
• TTA GS (Good Software) Certification (2010.12.06)
• LG CNS R&D Award (2010.01.04)
• Applied to Eunpyeong U-City and Jeju Smart Grid Demonstration Complex
• National research projects: "UHF RFID and Ubiquitous Networking Technology Development" (2007–2008, Ministry of Information and Communication) and "Enhancement of U-City Security Crime Prevention Service and Establishment of Linkage System" (2009–2010, Ministry of Land, Transport and Maritime Affairs)

Eolith (2000.07 – 2004.06)

Development Department employee working on arcade games and engines:

• Arcade games and engine development (2000.07 – 2003.12)
• Fortress2 Blue arcade (2001.07)
• BnB arcade (2003.05)
• Japanese Foxbat arcade game engine (2003)
• Cross-platform game engine (2001–2003)
• Mobile game engine development (2003.12 – 2004.06), including a KTF BREW-based engine and an SKT SKVM-based engine

Ablex (2000.03 – 2000.07)

Game Team employee responsible for online game development and maintenance, including maintenance work on Destiny.

Education

• Gaewon Middle School, Seoul (1992.03 – 1995.02)
• Joongdong High School, Seoul (1995.03 – 1998.02)
• Department of Computer Education, Sungkyunkwan University, Seoul (1998.03 – 2007.02)

Awards and Recognition

• Minister of Trade, Industry and Energy Award at the 21st National Teacher Invention Competition (2019.07)
• LG R&D Award (2012.03.07)
• LG CNS R&D Award (2010.01.04)
• TTA GS (Good Software) Certification (2010.12.06)

What Else Is on the Site

The navigation lists About, Portfolio, and Contact Me, plus sections labeled Imagine and IntelliSquare. The site is published in English and identifies him as "Sejin Chun — High School Teacher - Software Engineer." A contact email is provided on the About page.

Quick Reference

If you want to verify details or see project write-ups, the About and Portfolio pages on nyam.pe.kr are the primary sources.