Barry Sullivan
Staff Software Engineer at Whatnot
Ireland
Summary
👤
Senior🎓
Top SchoolBarry Sullivan is a Staff Software Engineer and solutions architect with 11 years of experience designing and leading teams on complex web and payments systems, currently focused on tax and payments compliance. He combines hands-on PHP expertise with event-sourced architectures and domain-driven techniques like Event Storming to turn ambiguous business problems into clean, testable solutions. Barry has a strong track record of improving legacy systems, establishing engineering best practices—automated testing, CI, code reviews and clean architecture—and building effective remote teams. He has led payments and compliance work at Etsy and Whatnot, and previously ran engineering and product teams across startups and agencies. A committed educator and community builder, he runs PHPDublin, contributes to open source (including PHP core), and regularly gives talks and writes about software development. His pragmatic focus on training and upskilling helps teams ship maintainable systems that scale beyond initial launches.
11 years of coding experience
17 years of employment as a software developer
Msc Computer Science, Msc Computer Science at Trinity College Dublin
Github Skills (33)
value-objects8
selenium-webdriver8
php7
nodejs6
browserstack6
testing6
routes5
bdd5
interpreter5
selenium5
protractor5
javascript5
webdriverio4
webdriver4
acceptance-testing4
Programming languages (3)
Github contributions (5)
barryosull/dql-server
May 2016 - Aug 2016
Contributions:139 pushes in 3 months
event-sourcedstatementsnodejsdomainserver-side
barryosull/texas-holdem-js
Apr 2020 - Jun 2021
A basic texas holdem app. WIP, like all the other holdem repos out there.
Contributions:63 pushes, 3 branches in 1 year 2 months
holdemtexastexas-holdemwipfat
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