Pragmatic problem solver, strong communicator, and a fast learner.


I work on improving GrabPay's cashless payment experience on Grab 'super app'.

Side Projects

My first iOS app Security Cards Widget was awarded App Store's Best of 2015, Best of 2016, and Best of 2017 apps.

Created an amusing AR app Notable Me which lets you swap your face with figures on dollar bills.


I spoke at various conferences and meetups in New York, Boston, and Seoul. I also co-organize a monthly iOS meetup, Let'Swift Pangyo. Check out my past talks here.

Other work and projects

WEBTOON, NAVER LABS, LINE Lite, a couple of open source projects, iOS Course on Udemy, etc