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Keita Kuroiwa
Keita Kuroiwa is a software engineer and entrepreneur who founded Flovia, a company focused on reducing API costs through pooled purchasing, and became its chief executive in 2026.[1][2] He has worked on Ethereum protocols and staking infrastructure and has held roles at Deloitte, Fracton Ventures, Obol Association, and the Ethereum Foundation.[1][3]
Education
Kuroiwa studied statistics, behavioral science, and human science at Keio University in Japan from 2018 to 2023, earning a bachelor’s degree.[1][3] His studies also included game theory and behavioral economics.[1] He received an AWS Certified Machine Learning certification in April 2023 and a Tokyo University blockchain certificate in November 2023.[1]
Career
Kuroiwa worked as a software engineer in Deloitte’s startup-accelerator department from April 2023 to May 2024.[1][3] He says his work involved research into machine learning, machine-to-machine messaging and payments, cryptography, and verification technologies, as well as mentoring artificial intelligence and cryptocurrency startups.[1]
From 2024 to early 2026, Kuroiwa was an entrepreneur-in-residence and software engineer at Fracton Ventures, an Ethereum incubator.[1][3] He says he co-built more than 20 protocols there and researched machine payments, behavioral science, game theory, and Ethereum protocols.[1] He has described his broader protocol work as spanning machine payments, impact evaluation, statistics, and causal inference, and says protocols he helped build raised more than $50 million in total.[1]
From February to July 2025, Kuroiwa worked as a researcher and software engineer at Obol Association, where he researched Ethereum staking and distributed validator technology (DVT).[1][3] He says the Obol team selected him as one of seven worldwide “Staking Masters.”[1] He also maintains a guide to Ethereum validation that covers solo validation and DVT setup, including the use of Obol Charon.[1]
The Ethereum Foundation selected Kuroiwa for a developer fellowship, which he held from September 2025 to January 2026.[1][3] His profile says he was selected from more than 30,000 developers and used the fellowship to build Ethereum protocols and applications and research Ethereum protocols, agent verification, and payments infrastructure.[1]
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