Matt Ketmo
Software Engineer at Kiln
Paris, Ile-de-France
Summary
🤩
RockstarMatt Ketmo is a seasoned software engineer with 14 years of experience, based in Paris, specializing in both web3 and traditional web technologies. He brings full-stack fluency—having contributed backend improvements to the widely used Composer PHP dependency manager and built refined front-end image tooling with his darkroomjs project. His work on Composer focused on low-level archive and download mechanics, improving support for git/mercurial archives and file handling reliability, showing a meticulous approach to platform robustness. On the front end he refactored complex cropping UX, addressing scaling and rendering edge cases to make client-side image editing more resilient. Comfortable moving between infrastructure-level backend tasks and pixel-perfect UI challenges, he combines pragmatic problem-solving with an appreciation for maintainable open-source craftsmanship. Based in Ile-de-France, he blends Parisian tech culture with an active open-source mindset and a growing focus on web3 systems.
14 years of coding experience
Stackoverflow
166reputation
3kreached
2answers
1question
Github Skills (27)
dependency-manager10
javascript10
croppie10
archiving10
user-interface10
image-cropper10
package-manager-tool10
image-editing10
crop-image10
php10
file-handling10
fabric10
cropper10
package-manager10
fabricjs10
Programming languages (20)
Github contributions (5)
MattKetmo/darkroomjs
Oct 2013 - Jul 2021
Extensible image editing tool in your browser
Role in this project:
Front-end Developer
Front-end DeveloperContributions:147 commits, 22 PRs, 77 pushes in 7 years 9 months
Contributions summary:Matt primarily worked on refactoring and extending the image editing tool's cropping functionality. They implemented a new crop zone with improved rendering, including background overlays and grid lines. The user added features such as the ability to select a crop zone via code. The user also focused on fixing scale and dimension issues to ensure the cropping feature worked correctly with a variety of image sizes.
imagebrowserjavascriptimage-editingextensible
composer/composer
Feb 2012 - Oct 2012
Dependency Manager for PHP
Role in this project:Back-end Developer
Back-end DeveloperContributions:13 commits, 1 comment in 8 months
Contributions summary:Matt primarily contributed to the Composer package manager's internal workings, focusing on archiving and downloading packages. Their work involved refactoring the archiver package, modifying how files are downloaded, and integrating changes to the archive manager. These changes included adjustments to file handling during archive extraction and improvements to the archive process by integrating and improving support for git and mercurial archive functionality.
phppackage-managerdependency-managerpackagescomposer
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