Sean Byrne
I work on the parts of software systems that determine whether they hold up or quietly fail.
Most of my career has been in security and infrastructure: identity systems, deployment pipelines, access controls, abuse prevention, encryption, and the decisions that outlive the moment they’re made.
I’ve worked through hypergrowth, regulated environments, and research settings where the consequences are different but the responsibility is the same. Build foundations that behave predictably under pressure.
Writing
On security, systems & incentives.
Projects
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Open source panic button for macOS. Instantly disables Touch ID and locks your screen.
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End-to-end encryption engine. Identity binding, key exchange, lifecycle management, and an SDK that doesn't require developers to become cryptographers.
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Authentication and identity security tooling. Practical approaches to understanding and improving authentication reliability.
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River guide and community resource for whitewater in Ireland.