Kazuki Nishiura in

Kazuki Nishiura

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CTO at Sardine
📍 Berkeley, California, United States

Kazuki Nishiura is the CTO at Sardine, an AI-powered platform for fraud, compliance, and payments. His experience includes scaling Bolt 10x and engineering for the Google Pay team. He earned a Masters in Computer Science from The University of Tokyo.

He has a passion for building new technology from scratch, demonstrated by his experience as a founding engineer for two mobile app startups. He is also a grand-prize winner of the Todai entrepreneur dojo and won an award at a Techcrunch hackathon.

Unique fact: Kazuki is the author of "sleet," an open-source payment processing abstraction library for the Go programming language.

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Experience
13 Years
Current Role
CTO
Job Level
Leadership
Location
Berkeley, California, United States
Personality Overview

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Communication Style
Decision Approach
Work Preference

Behavioral traits and communication patterns that shape how this person evaluates opportunities, builds trust, and makes decisions in professional settings.

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Priorities

Topics Kazuki cares about

AI in Fraud Prevention
As CTO of Sardine, he spearheads an AI decision platform and recently announced research grants to advance AI capabilities in sequence modeling and graph learning.
Payments Infrastructure
He has deep expertise from his time at Google Pay and Bolt, where he built multiple payment processor integrations and created an open-source payment library.
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Career

Work history

8-2020
CTO
Sardine
9-2017 - 8-2020
Staff Engineer / Software Engineer
Bolt
10-2014 - 9-2017
Software Engineer
Google
10-2014 - 5-2016
Founding Engineer
Oneminute
9-2013 - 9-2014
Founding engineer
Emaki inc.
In the press

Media appearances

Catching Fraud With AI-Powered Device Intelligence – Sardine & Revelo Customer Story. Featured in Revelo
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Kazuki Nishiura – CTO at Sardine | Catching Fraud With AI (Video Interview). Featured in YouTube
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Education
2012 - 2014
Master's degree
The University of Tokyo
2012 - 2013
Software Engineering in practice
TopSE
Social presence
in
Behavioral profile

DISC profile (public)

DISC behavioral profile

Dominance, influence, steadiness, and calculativeness scores with guidance on how this person prefers to communicate and decide.

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