Justin Chadwell
Software Engineer at Unikraft
Birmingham, England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolJustin Chadwell is a software engineer with 11 years of hands-on experience building and hardening cloud-native developer tooling, currently focused on core engine and build systems work. He has driven major contributions across high-profile open-source projects—containerd, BuildKit, Buildx, Dagger and Syft—improving runtime reliability, SBOM generation, heredoc parsing, and release automation. At Dagger he authored and reviewed thousands of PRs, led fortnightly release cadence and a migration to a custom graph evaluator, cutting release prep from a day to under 30 minutes. Comfortable across back-end, DevOps and docs, he pairs low-level parser and runtime fixes with pragmatic CI/CD and security automation. Based in Birmingham, he’s an open-source nerd who quietly focuses on developer experience and reproducible builds, often surfacing subtle protocol and error-handling bugs others miss.
11 years of coding experience
4 years of employment as a software developer
A levels Mathematics Computer Science and English Language, A levels Mathematics Computer Science and English Language at Kathmandu International Study CenterBachelor of Science - BSc Computer Science, Bachelor of Science - BSc Computer Science at University of BirminghamIGCSEs, IGCSEs at Kathmandu Internation Study Center
Stackoverflow
8reputation
0reached
0answers
0questions
Github Skills (29)
container10
docker10
parser10
buildkite10
testing10
sbom10
build-system10
containerization10
dockers10
cicd10
containerd10
go10
dockerfile10
golang10
linting10
Programming languages (23)
Github contributions (5)
docker/buildx
Apr 2022 - Jan 2023
Docker CLI plugin for extended build capabilities with BuildKit
Role in this project:
Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:425 reviews, 139 commits, 265 PRs in 9 months
Contributions summary:Justin primarily contributed to the `docker/buildx` repository by addressing build-related issues and enhancing the tool's capabilities. They implemented changes to the imagetools commands, ensuring the correct handling of the `--builder` flag and refactoring combining repository logic. The user also completed the remote driver by adding TLS support and improving the buildx create command. Furthermore, they updated dependencies and fixed code based on the golint results.
buildkitextendeddockercli-plugindocker-cli
dagger/dagger
Mar 2022 - Apr 2025
An open-source runtime for composable workflows. Great for AI agents and CI/CD.
Role in this project:Back-end and DevOps Engineer
Back-end and DevOps EngineerContributions:109 releases, 1582 reviews, 1412 PRs in 3 years
Contributions summary:Justin's commits primarily focus on improvements and maintenance within the Dagger project, specifically related to the engine's core functionality and its interaction with various external systems. The user has demonstrated a proficiency in enhancing the build process by addressing dependency updates and integrating with the BuildKit ecosystem. Furthermore, the user's contributions included fixing bugs that related to integration tests, improving the stability and reliability of the testing infrastructure, and building the foundation for other developers on the team.
containerscontinuous-deploymentcontinuous-testingbuildkitdeployment
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.