Majored in Database Manage System at the Pohang University of Science and Technology. Afterwards, developed web clickstream analysis systems at Nethru. With strong interest in engineering practices related to Agile Software Development (Test-driven development, refactoring, clean code, clean architecture, etc.), was active as an evangelist for such practices in and out of the company. Analyzed the Ethereum source code as a founding member of the Ethereum Study Group, and have recently been focusing on best practices for smart contract security. Currently involved in the development of a next generation blockchain platform as the Tech Lead for Dunaum’s Lambda 256.