Current Co-founder & Software Engineer in start-up company PLAT Corp. 5+ years experience specializing in back-end/infrastructure, web development and computer security. Super nerd who loves Vim, Linux and OS X and enjoys to customize all of development environment. Interested in devising a better problem solving method for a challenging task, and learning new technologies and tools if need arises.
Research Area

Research Area

Work Experience

Work Experience

  • Software Engineer / Co-FounderPlat

    Dec, 2015 - Present3 months

    • Implemented RESTful API server communicating with various applications(Web, Android, iOS) in Node.JS on Express.
  • Software Engineer & Security Researcher (Compulsory Military Service), R.O.K Cyber Command

    Aug, 2014 - Apr, 20161 year 8 months

    • Lead engineer on agent-less backtracking system that can discover client device's fingerprint(including public and private IPs) independently of the Proxy, VPN and NAT.
    • Implemented a distributed web stress test tool with high anonymity.
    • Improved functionality on military command and control system for incident response with Java Servlet.
    • Implemented a military cooperation system which is web based real time messenger in Scala on Lift.
  • Game Developer Intern at Global Internship ProgramNEXON

    Jan, 2013 - Feb, 20131 month

    • Developed in Cocos2d-x an action puzzle game(Dragon Buster) targeting U.S market. Implemented API server communicating with game cliend and In-App Store, along with two other team members who wrote the game logic, designed game graphics.
    • Won the 2nd prize in final evaluation.
  • Software Engineer, ShiftOne

    Dec, 2011 - Feb, 20122 months

    • To be updated
  • Freelance Penetration Tester, SAMSUNG Electronics

    Sep, 2013 - Sep, 20131 day

    • Conducted penetration testing on SAMSUNG KNOX, which is solution for enterprize mobile security.


  • Computer Science and Engineering, Bachelor, POSTECH(Pohang University of Science and Technology)

    Mar, 2010 - Present



  • Finalist DEFCON 22nd CTF Hacking Competition World Final

    Awarded on: Jan 01, 2014

  • Finalist DEFCON 21st CTF Hacking Competition World Final

    Awarded on: Jan 01, 2013

  • Finalist DEFCON 19th CTF Hacking Competition World Final

    Awarded on: Jan 01, 2011

  • 6th Place SECUINSIDE CTF Hacking Competition World Final

    Awarded on: Jan 01, 2012



  • Music

  • Sports

    BasketballSwimmingTable TennisRock-Climbing