Kenta Koyama
代表取締役CAIO at Smartround Inc.
Chiyoda, Japan
Summary
👤
Senior🎓
Top SchoolKenta Koyama is a seasoned software leader and founder with 11 years of experience who has grown Smartround from its second hire into its CTO and now CAIO, driving the product from zero to scale for startup finance SaaS. He blends hands-on full‑stack engineering (Kotlin, Scala, TypeScript, Vue) with product and organizational leadership, having led teams from 4 to 70 engineers. An active open-source maintainer and contributor, he authored kotlin-csv (≈400 stars) and has meaningful contributions to JetBrains’ Exposed and other major Kotlin projects, improving core database and type support. He holds a master’s from the University of Tokyo in system innovation and brings early Big Data and ML engineering experience from HP Japan. Notably, he founded Japan’s Server-Side Kotlin Meetup and won Startup CTO of the Year 2022, signaling both community impact and operational excellence.
11 years of coding experience
5 years of employment as a software developer
Nada Junior High SchoolMaster's degree, the department of technology, system innovation, agent based modeling, Master's degree, the department of technology, system innovation, agent based modeling at University of TokyoNada High School
Github Skills (8)
kotlin10
dao10
orm10
sql10
data-structures8
data-structure8
mysql7
testing7
Programming languages (9)
Github contributions (5)
JetBrains/Exposed
Jan 2018 - Jun 2020
Kotlin SQL Framework
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 commits, 10 PRs, 8 comments in 2 years 5 months
Contributions summary:Kenta contributed to the Kotlin SQL Framework by improving log messages to include ID information and escaping collation. They also made changes to the code to make `notInList` symmetrical with `inList` and added a size property on the `ColumnMetadata` class. Furthermore, the user added support for unsigned types such as `UByte`, `UShort`, `UInt`, and `ULong`. These changes suggest a focus on improving the framework's functionality and usability.
mysqlsqlkotlinsqliteorm
doyaaaaaken/Exposed
Jan 2018 - Nov 2020
Kotlin SQL Framework
Contributions:17 pushes, 12 branches in 2 years 10 months
mysqlsqlkotlinsqlite
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