Wu Zhangjin
Founder at RUMA.TECH
Zhuhai, Guangdong Province, China
Summary
🤩
Rockstar🎓
Top SchoolWu Zhangjin is a seasoned embedded Linux and RTOS engineer with 26 years of experience who founded RUMA.TECH to improve system-level user experience for Linux products. He combines hands-on kernel and BSP expertise—developed at Meizu and Wind River—with DevOps and tooling work showcased across TinyLab.org repositories that automate builds, testing, and Gitbook-based documentation. A prolific FLOSS contributor, he has improved vintage kernel labs (Linux 0.11) including floppy-boot support and cross-platform build fixes, and built infrastructure for Docker/QEMU-based kernel learning and automated release pipelines. Known for bridging low-level engineering with developer experience, he frequently turns complex build and deployment challenges into reproducible, well-documented workflows. Based in Zhuhai, he holds a master’s in Computer Software and Theory from Lanzhou University and often contributes technical writing and tooling that make deep systems topics accessible.
26 years of coding experience
10 years of employment as a software developer
Master, Computer Software and Theory, Master, Computer Software and Theory at Lanzhou University
Github Skills (30)
markdown10
gitbook10
git10
docker10
scripting10
bash10
build-system10
linux-kernel10
dockers10
kernel10
automation10
script10
markdown-it10
sys10
build-automation10
Programming languages (11)
Github contributions (5)
tinyclub/open-shell-book
Aug 2013 - Jul 2019
开源书籍：《Shell 编程范例》，面向操作对象学 Shell！本书作者发布了《360°剖析 Linux ELF》视频课程，欢迎订阅：https://www.cctalk.com/m/group/88089283
Role in this project:
DevOps Engineer & Technical Writer
DevOps Engineer & Technical WriterContributions:168 commits, 9 PRs, 80 pushes in 6 years
Contributions summary:Wu primarily focused on automating the build and release process for the open-shell-book project. They introduced scripts for uploading to a remote repository and generating releases, incorporating versioning and cover image handling. Additionally, the user integrated Gitbook support by developing scripts to convert existing markdown content to a Gitbook structure and included a script to automatically generate a table of contents, thereby enhancing the book's usability.
shelllinuxelfsh
zirandu/linux-0.11-lab
Mar 2015 - Jul 2015
Linux 0.11 Lab in 5 minutes
Role in this project:Embedded Systems Engineer
Embedded Systems EngineerContributions:75 commits in 4 months
Contributions summary:Wu primarily focused on enhancing the build process and fixing errors related to the compilation and execution of the Linux 0.11 kernel. Their contributions included adding support for floppy disk booting, which involved modifying build scripts and kernel code related to floppy disk initialization. They also resolved build issues on Mac OS X and addressed errors related to kernel size limits.
linuxlabubuntuminutes
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