> Markdown version of [/jobs/ext/4612182-lead-sdet](https://www.wearedevelopers.com/jobs/ext/4612182-lead-sdet). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Lead SDET - **Company:** Sanderson Recruitment Plc - **Location:** London, United Kingdom - **Experience:** Expert - **Salary:** £156,000 - £169,000 - **Contract:** Temporary contract - **Skills:** JavaScript (Programming Language), Automation of Tests, Continuous Integration, Strategies of Testing, Web Platforms, ReactJS, Cypress (Programming Language), Playwright, React Testing Library, JestJS, Pyramid, SDET - **Published:** November 7, 2026 - **Apply:** https://www.careerboard.com/gb/en/find-jobs-in-United-Kingdom/-389CFA22F718B69BEA/ ## About the Role * Strong understanding of testing principles and modern quality engineering practices. * Hands on experience with Jest or Vitest. * Experience with React Testing Library and Mock Service Worker (MSW). * Experience with building frameworks from scratch with Playwright or Cypress. * Knowledge of testing strategies such as the Testing Pyramid. * Experience working within CI/CD environments. ## Description We are seeking an experience hands-on Lead SDET to define and lead the test automation strategy for a modern web platform. Working closely with Engineering Managers, Technical Leads and React development teams, you will establish the vision, standards and governance required to build scalable, maintainable, and high-performing automation frameworks. You will be: * Design and implement testing strategies across unit, integration and end-to-end testing. * Build and maintain automated frameworks from scratch. * Ensure accessibility and other non-functional requirements are covered. * Champion quality engineering best practices and CI/CD integration.