@June, 2019

I'm a software maker aspired to bring technology and joy at your fingertips. I make quality apps and bring value to users.


I work on iOS apps at WEBTOON. More than 55M monthly users across United States, Taiwan, Thailand, and Indonesia enjoy comics and webtoon through our app.

Security Cards Widget

Since December 2014, my first iOS app instantly become a category killer. For three consecutive years, Security Cards Widget was announced among the App Store's Best of 2015, Best of 2016, and Best of 2017 apps, and on going.

Speaking & Sharing

I spoke at several conferences, including SwiftFest Boston, LetSwift '18, Naver D2 iOS Seminar, Naver Campus Seminar. All the presentations are available at slideshare. Also published a bestselling online course at Udemy for iOS beginners.

Previous Work

I've worked on many iOS apps, like AKI, d.code, Dr. Parking, an android app Line Lite, and several others which didn't make it.


I earned a Bachelor of Business Administration at Yonsei University and graduated NEXT Institute where I majored in Software Engineering and Entrepreneurship.

Email addresss