Masahiko Yasuoka
Senior Engineer at Internet Initiative Japan
Saitama Prefecture, Japan
Summary
👤
Senior🎓
Top SchoolMasahiko Yasuoka is a Senior Engineer with 16 years of experience building and maintaining OpenBSD-based systems for enterprise services at Internet Initiative Japan, and an active OpenBSD developer since 2010. He focuses on networking, packet filtering (PF), and low-level platform code such as efiboot and HID drivers, contributing bug fixes and architecture-wide enhancements to a widely used open-source OS. Based in Saitama, Japan, he combines carrier-grade production engineering with upstream open-source stewardship, ensuring IIJ services remain secure and reliable. An early entrepreneur who founded a software firm in the 2000s, he brings both practical product experience and deep systems-level craftsmanship to complex networking challenges.
16 years of coding experience
8 years of employment as a software developer
電気通信大学
Japanese, English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (5)
c1710
c1110
networking10
sys9
embedded9
Programming languages (7)
Github contributions (5)
openbsd/src
Jan 2023 - Jan 2023
Read-only git conversion of OpenBSD's official CVS src repository. Pull requests not accepted - send diffs to the tech@ mailing list.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 commit in 1 day
Contributions summary:Masahiko primarily worked on enhancing the OpenBSD source code, specifically within the networking and firewall (PF) components, and the efiboot codebase. The contributions involved fixing bugs related to packet filtering and the handling of network interfaces. The user's work also included enabling disk write functionality in efiboot for various architectures and supporting button input for the imt(4) HID driver.
openbsd
yasuoka/unescape
Feb 2019 - May 2021
Contributions:4 commits, 9 pushes, 1 branch in 2 years 4 months
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