We're rebuilding Frontiers' Publishing Platform - a manuscript-first architecture with embedded AI agents replacing legacy systems with modular, scalable services. As a Senior Quality Engineer, you'll work independently to embed quality throughout the development lifecycle, not just validate it at the end. You'll shift testing left - spotting risks before code is written, building validation into CI/CD, and making autonomous calls on risk, coverage, and release readiness - while coaching the wider team to raise their own testing practices and use AI tools effectively. Key Responsibilities * Drive validation strategy independently: what to test, at what level, and how - starting before development begins * Define test scenarios covering key flows, edge cases, and risk areas; challenge non-functional requirements (performance, reliability, security) * Build and maintain automated tests (API, integration, end-to-end) running continuously in CI/CD * Own release-readiness calls and post-release checks, using production signals (errors, logs, metrics)



to close the loop * Coach the team on testing practices, shared quality ownership, and effective use of AI tools * Contribute to the wider Quality Engineering community and standards Requirements * 5+ years in Quality Engineering / QA, with experience defining validation strategy independently * Strong systems thinking - able to spot risks and failure points across component interactions * Experience with API testing (REST Assured, Postman), integration/E2E testing, and CI/CD-integrated automation * Experience with performance testing (k6, JMeter) * Comfortable working with minimal oversight and making risk trade-off calls * Curiosity about AI-assisted testing tools Nice-to-Have Skills * Contract testing (Pact), Playwright, BDD, large-scale migrations * Comfortable reviewing pull requests and contributing to test code when needed Benefits * We prioritise office presence and emphasise in-person collaboration, but also offer a

📌 Senior Quality Engineer (Madrid)
🏢 Frontiers Careers
📍 Madrid