Inflearn (March 2022 ~ )
Created online video tutorial in SwiftUI and continue to make it (Korean)
Donggok Precision (January 2019 ~ March 2020)
Managed imported security products such as x-ray and metal screening detection
Garden City Communication (August 2016 ~ August 2018)
install, maintain and repair electronic communications equipment in telecommunications networks and internet supply systems
Gangbuk samsung hospital (March 2009 ~ March 2012)
using x-ray and other imaging equipment to take images of injuries and diseases.
Korea National Open University, KR (February 2020)
CPIT, NZ (March 2016)
Shin Heung College, KR (February 2009)