Joined foreign affiliated IT vendor on 1999, worked as IT engineer, System engineer and IT Architect for financial customers such as credit card company. After then, led design of IT infrastructure and Enterprise Architecture for a lot of financial customers as Chief Architect manager. From July 2019, has started as CTO at GMO Aozora Net Bank, Ltd. and led develop "sunabar-GMO Aozora net Bank,  sandbox for bank APIs"