ChainCatcher news, the blockchain-based electronic document platform Firmachain has appointed Lee Yong-gu as its new Chief Technology Officer.Lee Yong-gu graduated from the Department of Computer Science at Korea University and completed his Ph.D. in Engineering at the same graduate school. He previously served as the CTO of Riiid, a company that developed the AI learning platform "Santa TOEIC," innovating AI-based learning solutions, and contributed to establishing the technical foundation for digital asset trading through his experience as CTO at the blockchain exchange GDAC.