Linux · Systems Software · Open-Source
I'm Roman Lefler, a Linux and systems software engineer who turns everyday problems into dependable products. I build and maintain widely used open-source desktop software, with additional experience in endpoint engineering and applied AI research.
Professional Roles
My technical experience includes systems and open-source software, endpoint engineering, and AI research.
CSB+SJU
Researching explainable and privacy-preserving AI for mammography using Grad-CAM, SHAP, LIME, differential privacy, and federated learning.
Elumynt
Developed Django and React product features, a TypeScript Teams bot, relational database schemas, and a four-service Docker deployment.
CSB+SJU
Automating and supporting software deployment across 2,000+ Windows and macOS devices with PowerShell, Bash, Intune, and Jamf.
Featured engineering story
SimpleWeather · GNOME ShellHow I learned from the failures of a legacy GNOME extension and completely redesigned the networking, state, UI, architecture, and release practices.
Read the case studySelected work
WeatherA redesigned TypeScript weather extension for GNOME Shell with 70,000+ downloads and an active contributor community.
Engineering Deep Dive
XAI & PrivacyResearch on explainable, privacy-aware AI for breast-cancer imaging.
CBIS-DDSM mammogram via TCIA; Grad-CAM and processing by Roman Lefler. CC BY 3.0 (opens in a new tab)
A C99 custom language compiler project with a lexer, abstract syntax tree parser, and LLVM code generation.
Opens repository on GitHub
About me
St. John's University · Class of 2028I'm studying computer science at St. John's, with additional study in mathematics and ancient Mediterranean classics. My work centers on Linux desktop and systems software: GNOME Shell extensions in TypeScript and GJS, C libraries and command-line tools, and the release engineering that keeps these projects dependable.
Lately I've been maintaining my GNOME software which has a large user base. I also research explainable and privacy-preserving AI for breast cancer screening.
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Let’s connect
I'm always happy to compare notes on open source, Linux, or whatever you're building.
hello@romanlefler.com