Jari Ronkainen
Software Developer at Buutti Oy
Oulu, Mainland Finland
Summary
👤
Senior🎓
Top SchoolJari Ronkainen is a pragmatic software developer with 13 years of experience building robust, portable systems and auditing software from his base in Oulu, Finland. He blends low-level systems work—demonstrated by contributions to proot that improved portability and maintainability—with applied AI and game development experience from roles at Valossa and Fingersoft. At Buutti Oy he combines programming, security-minded auditing, and teaching, and earlier entrepreneurial work included running a tea-import business alongside freelance coding. Comfortable across testing, fuzzing and backend tooling, he favors practical, standards-based fixes and long-lived maintainability improvements. Outside of work he describes himself as a “guitarslinging nerd,” hinting at a creative streak that complements his technical focus.
13 years of coding experience
7 years of employment as a software developer
Mechanical Engineering, Mechanical Engineering at University of Oulu
English, Finnish, Swedish, German, Japanese, Chinese
Github Skills (8)
c1710
syscall10
ptrace10
linux10
c1110
compatibility9
header-files9
git7
Programming languages (9)
Github contributions (5)
proot-me/proot
May 2018 - May 2018
chroot, mount --bind, and binfmt_misc without privilege/setup for Linux
Role in this project:
Backend Developer
Backend DeveloperContributions:8 commits, 1 PR in 1 day
Contributions summary:Jari primarily focused on improving the codebase's robustness and portability. Their contributions included fixing missing include statements, correcting a typo, and replacing non-standard functions with standard ones. They also refactored code to use a defined type for `ptrace_request` and disabled GCC function instrumentation based on glibc presence. These changes aimed to enhance the project's compatibility and maintainability.
ptracebind-mountmountbindlinux
ronchaine/glfw
Dec 2016 - Jun 2023
Contributions:39 pushes, 19 branches, 1 tag in 6 years 7 months
openglmulti-platformgraphicswindow
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