Kazuki Nishiura

Kazuki Nakajima is the Chief Technology Officer at Sardine, where he oversees the development of the company’s AI Risk Platform for fraud and compliance. He has more than a decade of experience building and scaling complex financial technology systems, with expertise spanning payments, fraud detection, and large-scale distributed architectures.

Before Sardine, Kazuki was a staff engineer at Bolt, where he helped scale the company 10x in three years as it grew from Series A through Series C. He led integration engineering, managed a global team, and built core infrastructure including payment processor integrations, an in-house A/B testing framework, and Bolt’s open-source payment library (sleet). Prior to Bolt, Kazuki worked on the Google Pay team at Google, and was the founding engineer at Emaki Inc.

Kazuki holds a master’s degree in computer science from the University of Tokyo. During his studies, he completed internships at Google and Facebook, gaining experience in software development and large-scale testing systems.