Koji Okuma
Director at Fixstars Corporation（株式会社フィックスターズ）
Kanagawa Prefecture, Japan
Summary
👤
Senior🎓
Top SchoolKoji Okuma is a director-level software engineer with 16 years of hands-on experience designing, implementing, and testing firmware and server software in C/C++/Java/C#. He leads a nine-person firmware team at Fixstars while remaining a hands-on developer, previously building SSD firmware modules and critical embedded systems. His background blends practical product delivery—working on ETC systems, distributed file servers, and home security firmware—with formal methods expertise from IV&V work and a Ph.D. in computer science. That mix of programming-language theory and applied systems engineering enables rigorous design and verification practices uncommon in many firmware teams. He has repeatedly stepped into technical leadership roles, managing small cross-disciplinary teams and partnering with business stakeholders to ship reliable, auditable software. Based in Kanagawa, Japan, he brings research-grade rigor to production-constrained engineering challenges.
16 years of coding experience
14 years of employment as a software developer
Doctor of Philosophy (Ph.D.) in Engineering, Computer Science, Doctor of Philosophy (Ph.D.) in Engineering, Computer Science at 筑波大学
Japanese, Chinese
Github Skills (11)
location10
clustering9
scale8
cluster-computing8
distributed-computing8
large-scale7
data-sharing7
distributed-file-system6
fuse5
solaris5
linux4
Programming languages (2)
Github contributions (3)
kojiokuma/qmk_firmware
Jun 2019 - Aug 2019
Open-source keyboard firmware for Atmel AVR and Arm USB families
Contributions:3 pushes in 1 month
rp2040nrf52840firmwareavratmel
oss-tsukuba/gfarm
Jan 2010 - Mar 2013
distributed file system for large-scale cluster computing and wide-area data sharing. provides fine-grained replica location control.
Contributions:109 commits in 3 years 3 months
replicacluster-computingfine-grainedsharingscale
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