Armijn Hemel
Software Engineer
Summary
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RockstarArmijn Hemel is a seasoned software engineer with 16 years of experience, specializing in open source license compliance and low-level format engineering. He helped create the first prototype of NixOS and has a background with gpl-violations.org, demonstrating deep roots in both systems design and software licensing advocacy. His contributions to Kaitai Struct show a knack for reverse-engineering binary formats and translating complex file specifications into machine-readable descriptions. He combines practical hacking (including UPnP research) with rigorous, auditable engineering practices that suit security- and compliance-minded projects. Based in the Netherlands, he brings a rare blend of legal-awareness, systems thinking, and hands-on data format expertise to open-source and infrastructure work.
16 years of coding experience
Github Skills (9)
data-analysis10
data-serialization10
kaitai-struct10
filetype10
file-format10
serialization10
image-file9
imageformats9
firmware7
Programming languages (21)
Github contributions (5)
kaitai-io/kaitai_struct_formats
Mar 2021 - Oct 2022
Kaitai Struct: library of binary file formats (.ksy)
Role in this project:
Data Engineer
Data EngineerContributions:155 reviews, 72 commits, 81 PRs in 1 year 7 months
Contributions summary:Armijn contributed to the development of file format specifications within the Kaitai Struct project, which is a domain-specific language for describing binary file formats. Their work included adding and modifying specifications for various file types, such as GIMP brush files, uImage files, ICC profiles, and various audio, image and archive formats. The contributions show a strong focus on understanding and translating file structures into Kaitai Struct descriptions. They also demonstrated proficiency in reading file format specifications, interpreting binary structures, and representing them in a machine-readable format.
file-formatmime-typesbinary-datadubnimble
armijnhemel/qr-recordlabels
Jul 2017 - Jan 2021
Contributions:18 commits, 14 pushes, 1 branch in 3 years 6 months
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