Colin Walters
Senior Principal Software Engineer at Red Hat
Sudbury, Massachusetts, United States
Summary
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RockstarColin Walters is a Senior Principal Software Engineer at Red Hat with 23 years of experience building and hardening Linux systems, CI pipelines, and container tooling. He blends deep systems and backend expertise—OSTree, dracut, Anaconda, and Fedora CoreOS—with DevOps and build-architecture work across high-profile projects like Flatpak, Podman, and Tokio. Colin has a track record of improving build/runtime environments, tightening security boundaries, and optimizing low-level I/O and filesystem interactions for reliability and performance. He frequently bridges developer and release workflows by refactoring CI, introducing reproducible container image formats, and adding robust testing and debugging services. Equally comfortable touching front-end UX in GNOME or adding async utilities in Rust, he brings practical multi-language craftsmanship to complex platform problems. Based in Sudbury, MA, he is an open-source-minded engineer who quietly shapes foundational tooling used across modern Linux distributions and container ecosystems.
23 years of coding experience
Github Skills (123)
fedora-coreos10
python10
testing10
command-line-interface10
bash10
websocket10
c1110
file-operations10
terraform10
security10
glib10
c1710
system10
automation10
dns10
Programming languages (25)
Github contributions (5)
bootc-dev/bootc
Nov 2022 - Mar 2023
Boot and upgrade via container images
Role in this project:
Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:22 releases, 607 reviews, 123 commits in 3 months
Contributions summary:Colin contributed to the bootc project by enhancing the command-line interface (CLI) and improving the status reporting functionality, specifically splitting the status JSON output and incorporating a "backend" column. They also refactored and optimized the upgrade and switch command flows, ensuring proper namespace handling and improved code clarity. Furthermore, the user implemented and maintained CI infrastructure, integrating kola tests and ensuring support for container image builds within the development pipeline.
containerscontainerdockercontainer-images
coreos/coreos-assembler
May 2018 - Jan 2023
Tooling container to assemble CoreOS-like systems
Role in this project:DevOps Engineer
DevOps EngineerContributions:776 reviews, 917 commits, 1307 PRs in 4 years 9 months
Contributions summary:Colin focused on improving the build and deployment process of the CoreOS assembler project. Their contributions included the addition of new build tools and dependencies like `createrepo_c` and `dnf-utils`, and they modified the Dockerfile to install packages and improve the image size. The user also worked on the build system to support the new "oci-archive" format for the ostree container images, as well as the new --transient mode and the --no-net flag to improve the CI build times. Additionally, the user implemented improvements to the code by adding a `qemu-iso` platform.
containerscoreosbuildsystemdockerassemble
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