Kohei Kaigai
Chief Architect & CEO at HeteroDB
Chiyoda, Japan
Summary
🤩
Rockstar🎓
Top SchoolKohei Kaigai is a seasoned software architect and entrepreneur with 26 years of experience building and commercializing open-source infrastructure, currently serving as Chief Architect & CEO of HeteroDB. He is the original author of PG-Strom and a major PostgreSQL contributor—work that spans SE-PostgreSQL, FDW, CustomScan/Join interfaces and GPU-accelerated query processing. Kohei began his career as an L3 Linux kernel support engineer and progressed to leading in-company startup efforts at NEC to productize GPU-accelerated database features. He blends deep systems programming (Linux, SELinux, PostgreSQL, Apache) with product and business development, having driven partnerships, financing and go-to-market strategy. Notably, his contributions include integrating Apache Arrow and BRIN-aware optimizations into PG-Strom to accelerate big-data SQL workloads on GPUs. Based in Chiyoda, Japan, he couples technical depth with an MBA-informed approach to turning open-source innovation into commercial solutions.
26 years of coding experience
11 years of employment as a software developer
Master of Business Administration (MBA), Economics, Master of Business Administration (MBA), Economics at University of Tsukuba
Japanese, English
Github Skills (12)
apache-arrow10
postgresql10
sql10
database-optimization10
c119
c179
gpu-programming9
cuda8
file-processing8
file-handling8
fileio8
file-access8
Programming languages (2)
Github contributions (5)
heterodb/pg-strom
Dec 2014 - Jan 2023
PG-Strom - Master development repository
Role in this project:
Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:4 reviews, 3039 commits, 62 PRs in 8 years 2 months
Contributions summary:Kohei focused on enhancing the performance of PostgreSQL's storage and query processing. They contributed by adding support for Apache Arrow file integration, introducing new SQL functions for data handling, and refining database indexing techniques, particularly with BRIN indexes. A core aspect of their work was implementing and optimizing GPU integration to accelerate SQL workloads, involving contributions to the data storage and retrieval systems to support the underlying architecture.
master
kaigai/sepgsql
Dec 2015 - Aug 2016
Contributions:3 commits, 76 pushes, 46 branches in 8 months
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