Justin Chadwell

• Worked in the core dev team to build out new Dagger engine features and performance improvements.
• Handled escalation of feature requests and resolution of complex production issues for customers.
• Managed release process and cadence for each fortnightly release, including curating milestones and coordinating internal communication.
• Improved automation in our own dog-fooded CI, with a focus on low touch releases.
• Assisted with booth duty across multiple KubeCon EU/US events, pitching, discussing and demoing Dagger to attendees.

• Supported the open-source container ecosystem by developing and maintaining popular open-source projects, Buildx and BuildKit.
• Improved software supply chain security by integrating in-toto attestations and SBOMs into BuildKit.
• Prototyped and helped launch the Docker Build Cloud service for remote buildkit compute.

• Maintained build systems, CI/CD infrastructure and developer tooling to enable developer productivity and communication across teams.
• Designed internal fuzzing and static analysis pipelines to automate bug hunting and increase visibility of security issues.
• Investigated complex low-level video codec issues from production environments.

• Designed and developed a new Jamstack home site and blog from scratch.
• Created a frontend as well as authentication, payment and mailing microservices for the Live Chemistry SaaS platform.
• Wrote CI/CD pipelines utilizing Terraform and Docker to automate deployment.

• Introduced support for next-gen ARM security features in open-source firmware.
• Presented to engineers in the Open Source Software Group about using the Undefined Behavior Sanitizer in firmware, an area I researched while interning.

• [97%] Advanced Networking
• [96%] Algorithms and Complexity
• [95%] Programming Languages
• [94%] Security of Real-World Systems
• [86%] Final Year Project

• [A*] Computer Science
• [A*] Mathematics
• [A] English Language

Capture the Flag competition for Hack The Midlands 4.0 and 5.0.

I developed a CTF mini-event over both years, involving chatbots, DNS servers, hackable games, providing an introduction to computer security for attendees.

An entirely open-source port forwarding helper from localhost built using SSH tunnels.

I built it out of a frustration that none of the existing tools in the area were open source or had minimal client-side dependencies.

• Helped plan and organize a hackathon of over 250 attendees.
• Developed a custom virtual badge system to allow users to customize their badges using Lua.
• Designed and ran a security-focused CTF, accessible to attendees of all ages and skill levels.

• Represented the university in CTFs as a top 10 ranked UK team.
• Developed WhatTheCTF competitions for UoB’s School of Computer Science and INRIA’s 2019 SILM summer school.
• Managed infrastructure on Google Cloud Platform and Hetzner using Docker and Kubernetes.

• Built up the CompSci community at UoB by encouraging participation in society events, and enhancing relations with societies at other Universities.
• Organized and ran a number of events, including hackathons, talks and workshops.
• Re-designed the society’s website to engage students and provide a hub for important information and news.
• Became a Google Student Developer Club Lead to include more workshops and talks.