John Mcdonnell
Senior Software Engineer In Test at GitLab
Ireland
Summary
👤
Senior🎓
Top SchoolJohn Mcdonnell is a Senior Software Engineer in Test with a decade of experience driving test automation and quality in financial services and enterprise SaaS environments. He has led backend and frontend automation efforts—building and maintaining large-scale test suites (1000+ tests) for Golang APIs and Gherkin/Cucumber-driven UIs—optimizing parallel execution and CI pipelines to catch regressions across multiple backends. Comfortable across Golang, Java and JavaScript, he pairs deep troubleshooting instincts (especially for elusive intermittent defects) with practical DevOps skills including Docker and AWS. At GitLab and previous employers he’s been an automation champion who brings both hands-on implementation and organization-wide advocacy for test-first practices. Notably, he delivered sub-three-minute execution of extensive contract and integration test suites, demonstrating a focus on speed and reliability that keeps deployments safe and fast.
10 years of coding experience
8 years of employment as a software developer
Leaving Certificate, Leaving Certificate at Cnoc Mhuire, Granard, Co LongfordBachelor of Science (B.Sc.), Enterprise Computing, First Class Honours (1.1), Bachelor of Science (B.Sc.), Enterprise Computing, First Class Honours (1.1) at Dublin City University
French, Irish, English
Github Skills (23)
command-line-tool8
ledger7
elo6
security5
static-analysis4
shopify4
accounting4
golang4
command-line4
react4
go3
selenium-webdriver3
static-code-analysis3
testing3
benchmarking3
Programming languages (5)
Github contributions (5)
johnmcdnl/darts-frontend
Sep 2016 - Dec 2025
Contributions:11 PRs, 13 pushes, 12 branches in 9 years 4 months
johnmcdnl/projectEuler
Apr 2016 - Oct 2022
Contributions:25 PRs, 62 pushes, 37 branches in 6 years 7 months
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