Sorah Fukumori
Principal Software Engineer at 株式会社IVRy
Tokyo, Japan
Summary
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RockstarSorah Fukumori is a Principal Software Engineer based in Tokyo with 16 years of experience blending backend engineering, security, and corporate IT leadership. They have led cross-functional programs as Head of Corporate Engineering and CISO at Cookpad, delivering complex projects from Google Workspace domain renames and global live-stream events to multi-region AD and Zero Trust network migrations. Hands-on in open source, Sorah has contributed to core Ruby, the popular itamae configuration tool, and cert-manager’s Vault integration—work that reflects both systems-level rigor and cryptographic/PKI nuance. They excel at turning operational complexity into reliable, auditable workflows and developer-friendly tooling, often improving CI/test infrastructure and secure defaults. Known for organizing community events like RubyKaigi and for tackling subtle security/permissions bugs, Sorah brings both public-facing leadership and meticulous technical craftsmanship.
16 years of coding experience
13 years of employment as a software developer
English, Japanese
Github Skills (25)
kubernetes10
programming-language10
file-management10
tls1210
testing10
tls1310
cicd10
ruby10
mtls10
certificate10
lang10
go10
build-automation10
vault10
kubernetes-pods10
Programming languages (19)
Github contributions (5)
itamae-kitchen/itamae
Feb 2015 - Oct 2016
Configuration management tool inspired by Chef, but simpler and lightweight. Formerly known as Lightchef.
Role in this project:
Backend Engineer
Backend EngineerContributions:7 commits, 5 PRs, 3 pushes in 1 year 8 months
Contributions summary:Sorah contributed to the `itamae` project by addressing issues related to file and directory mode management, ensuring correct permissions. The contributions included fixing bugs where mode and owner weren't being set correctly. The user also worked on ensuring tempfiles were secure by setting permissions.
configuration-managementansibleinfrastructurerubyinfrastructure-as-code
ruby/ruby
Jul 2011 - Aug 2011
The Ruby Programming Language
Role in this project:Back-end & Automation Engineer
Back-end & Automation EngineerContributions:2 reviews, 3 commits, 24 PRs in 1 month
Contributions summary:Sorah primarily contributed to bug fixes and improvements related to the Ruby programming language and its ecosystem. They addressed issues in RubyGems, the standard library's `zlib` and `readline` modules, and the `reline` library, improving the stability and functionality of the language and its related tools. Additionally, the user implemented CI-related changes, such as ensuring tests pass and correcting how builds are run. These commits are geared towards improving the testing and build infrastructure of the Ruby project.
object-orientedruby-languageprogramming-languagerubyc
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