KEIX Co., Ltd.
KEIX Co., Ltd. takes its name from my online history.
Over 25 years ago, I spent a lot of time on international IRC, using my real name kei as my nickname. I noticed I was receiving an unusual number of private messages, and when I asked why, someone explained that my name was often mistaken for a female name.
So I appended an “x” — a very UNIX-like solution — and keix stuck. That single letter has followed me ever since.
Our Expertise
From system-level programming to cloud-native infrastructure, our expertise covers the full spectrum of modern software development. We design custom operating systems for experimental research and industrial use, implement efficient backend services that scale, and optimize applications for performance-critical environments where predictability is key.
Our team is fluent in Zig, C/C++, Rust, Go, and Python, JavaScript and Common Lisp, Haskell or etc... With a deep focus on GNU/Linux and UNIX-inspired design principles. This breadth allows us to bridge low-level programming with high-level architecture, ensuring systems are not only functional but also elegant, maintainable, and robust against change.
Engagements
For collaboration, consulting, or educational engagements, please feel free to get in touch. We welcome inquiries from individuals, organizations, startups, and academic institutions.
We are particularly interested in projects that emphasize technical depth — whether in operating systems, low-level programming, compiler and emulator design, or the architecture of sustainable infrastructure. Our consulting services range from performance tuning of existing systems to designing entirely new platforms that demand stability and long-term clarity.
In addition, we provide educational support for advanced learners in computer science, helping students and professionals deepen their understanding of how systems truly work beneath the surface. This includes creating detailed technical documentation, offering workshops, and guiding learners through the complexities of operating systems and kernel-level development.
Technical Notes
This site is built in Go and runs as a single, self-contained binary. Go’s speed, reliability, and simplicity make it an ideal choice for delivering a fast and lightweight experience.
We believe in using the right tool for the right job — while Zig and C may be ideal for kernel-level work, Go shines in its ability to produce clean, minimal binaries for web and infrastructure services. By combining these technologies, we demonstrate our core principle: software should be efficient, transparent, and designed with purpose.
Contact Us
For collaboration, consulting, or educational engagements, please get in touch. We welcome inquiries from individuals, organizations, and academic institutions. Personal introduction as the Lead Programmer is available here. This project is led by @Kei Sawamura and written in Go on Gentoo Linux with Vim.