👋 Hi, I'm Colin

Senior QA Engineer. Playwright + AI.

I help engineering teams ship faster with fewer bugs.

8+ years. First QA hire at two startups. Currently at Circularise, where I'm shipping AI into the QA process — bug triage 30% faster, test case writing 60% faster, automation authoring 50% faster.

Based in Ireland. Dual IE/UK citizen. Remote-first, open to on-site in EU/UK/US/AU.

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Want to work together?

📧 [email protected]

💼 linkedin.com/in/colin-caraher

💻 github.com/colin-c6

Resume:

Colin Caraher Resume.pdf

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🤖 What I'm doing right now: AI in QA

Most teams "use ChatGPT sometimes." I've spent the last year embedding AI as a teammate inside the QA process at Circularise. Four production processes I've built and shipped:

• Automated bug review — AI reads new bug reports and flags missing repro steps, environment, expected vs actual behaviour before triage. Triage time down 30%.
• Test case writing & prioritisation — AI proposes test cases from feature specs and ranks them by risk. Authoring time down 60%.
• AI-assisted test automation — Copilot + Claude Code in the loop for writing Playwright tests. Authoring time down 50%.
• PR review from the end-user perspective — Claude-based skill that reviews PRs against user-facing impact, not just the diff. Catches UX regressions line-by-line review misses.

💼 Selected work

Circularise — Senior QA Engineer (2023 → present, remote NL)

First QA hire. Built the function from zero.

• Production incidents down ~40%
• Manual QA effort down ~70%, regression cycle halved
• P1/P2 mean time to resolve: 17 days → <24 hours