Coby Plain
Senior Principal Software Engineer Jira Cloud at Atlassian
Sydney, New South Wales, Australia
Summary
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Senior🎓
Top SchoolCoby Plain is a Senior Principal Software Engineer based in Sydney with 13 years of experience leading large-scale frontend and mobile initiatives at Atlassian, primarily across Jira Cloud. He specialises in reliability, performance, and developer productivity, driving cross-team programs that uplift CI/CD, tooling, and customer satisfaction at scale. Coby blends hands-on architecture and engineering (from founding Jira mobile apps to Kotlin multiplatform efforts) with people and process design—hiring, onboarding ~25 engineers, and shaping org-level operational practices. He favours pragmatic, maintainable code and iterative processes, believing that investing in foundations and internal workflows is the multiplier for growth. A pragmatic problem-solver, he has repeatedly delivered measurable performance and quality improvements (including a 60% speed gain on core flows) while embedding data-driven and developer-centric practices across products.
13 years of coding experience
11 years of employment as a software developer
Bachelor of Information Technology, Computer Science, Bachelor of Information Technology, Computer Science at University of Technology Sydney
Github Skills (20)
coverage9
jar7
bytecode7
war7
resharper7
istanbul7
kotlin7
code-coverage6
java-api6
obsolete6
openjdk6
jacoco6
java-agent6
instrumentation6
bytecode-manipulation6
Programming languages (1)
Github contributions (5)
cplain/augmented-reality-tutorial
Nov 2012 - Dec 2012
Contributions:5 commits in 4 days
splitrealitystagesaugmentedaugmented-reality
cplain/cplain.github.io
Sep 2015 - Jun 2017
Contributions:67 pushes, 1 branch in 1 year 9 months
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