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Juanjo UserJU
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Juanjo User

@juanjouser

Senior QA Automation Engineer at a Stealth DeFi platform, architecting TypeScript and Playwright tests for transaction workflows.

Spain
Message

At a Stealth DeFi platform, I architected a greenfield end-to-end and API test automation framework using TypeScript and Playwright. I integrated its automated regression suites into deployment pipelines to run on every pull request.

At Summer.fi, I architected and maintained Playwright test suites across end-to-end, API, and regression testing. I also improved execution time and reduced test flakiness through parallel execution and custom fixtures.

Earlier, at Lokalise, I developed a modular TypeScript and Playwright framework and validated subscription billing data with SQL and API responses. My experience also includes e-commerce testing at YOOX NET-A-PORTER GROUP and Kaspersky Lab, plus QA delivery for gaming clients at Testronic & SEGA Europe.

Experience

Work history, roles, and key accomplishments

Education

Degrees, certifications, and relevant coursework

Open University logoOU

Open University

Postgraduate Certificate, Computing

Postgraduate Certificate in Computing from the Open University, UK.

Universidad de Zaragoza logoUZ

Universidad de Zaragoza

MEng, Industrial Engineering

MEng Degree in Industrial Engineering from Universidad de Zaragoza, Spain.

IS

ISTQB

ISTQB-BCS Certified Tester: Foundation Level, Software Testing

ISTQB-BCS Certified Tester: Foundation Level certification.

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