Keita participated in several internships as a university student, helping launch a programming education service at CyberAgent and introducing a sentiment analysis platform for video services at DeNA. He later joined Mercari’s research and development organization—known as R4D—as an intern. Upon graduating university in 2018, he joined Mercari full time as a blockchain engineer and was involved in the MercariX project at R4D. Keita then moved to Merpay, where he served as a PM on teams working on distributed ledger development, AML systems, and credit design. In April 2021, he moved to Mercoin as the Director of the Product Division, and after serving as CPO, he assumed his current position in April 2023.