Mark Haylock
Staff Software Engineer at Buildkite
Christchurch, Canterbury, New Zealand
Summary
👤
Senior🎓
Top SchoolMark Haylock is a Staff Software Engineer with roughly 15–18 years of experience building pragmatic, maintainable full-stack web applications using React, Node.js, Ruby and TypeScript. He combines hands-on delivery with engineering leadership—mentoring teams, improving code quality, and guiding architectural decisions from his time leading small teams through acquisitions and handovers. Mark has a strong track record modernizing legacy Rails systems (notably contributing backend fixes and performance improvements to the Refinery CMS) and shipping high-quality frontends and platform migrations. He values empathy and clear communication as much as technical rigor, and prioritizes solutions that minimize long-term maintenance costs. Based in Christchurch, New Zealand, he excels at tackling tricky problems in existing codebases and enabling teams to adopt better practices like continuous delivery. Colleagues describe him as a pragmatic problem-solver who learns from production experience and turns those lessons into repeatable engineering improvements.
15 years of coding experience
19 years of employment as a software developer
BSc, Computer Science, BSc, Computer Science at University of Canterbury
Github Skills (7)
ruby-rails10
refinery-cms10
rails10
back-end-development10
ruby10
generator9
caching8
Programming languages (8)
Github contributions (5)
refinery/refinerycms
Mar 2011 - Jan 2012
An extendable Ruby on Rails CMS that supports Rails 6.0+
Role in this project:
Back-end Developer
Back-end DeveloperContributions:10 commits in 10 months
Contributions summary:Mark primarily contributed to the back-end of the Refinery CMS, focusing on bug fixes, generator updates, and code refactoring. Their work included addressing spelling errors, re-enabling caching for logged-in users to improve site performance, and fixing image/resource picker redirects. They also made changes to core files, including updates to the generator and gemspec, and added a functionality to acknowledge 'initialised' state in various objects.
ruby-on-railscmsrails-cmsrailsrefinery-cms
resolve/swift-playground
Jan 2015 - Feb 2015
Contributions:3 releases, 54 commits, 5 pushes in 12 days
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