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Senior Test Engineer

United Kingdom 80000.00 GBP / Year · Job Posted March 04, 2026
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Job Description

I’m working with a fast-growing SME who are accelerating the resale and recommerce industry. The company offer an end-to-end solution that combines modern technology, smart data, and expert valuation to create a seamless, customer-first marketplace experience. As the Senior Test Engineer, you will own and build the quality function across their customer-facing websites and front-end applications. You will define the testing foundations, implement modern automation practices, and embed a quality-first mindset across the engineering team.

Job Responsibility

  • Design, build, and maintain automated test frameworks using Playwright and C#
  • Lead both manual and automated testing across web and front-end applications
  • Establish testing standards, processes, and best practices from the ground up
  • Own end-to-end quality assurance from planning through to release sign-off
  • Integrate automated tests into CI/CD pipelines (Azure DevOps, GitHub Actions)
  • Conduct regression, exploratory, negative, and boundary testing
  • Collaborate with developers and product managers to define acceptance criteria and test strategies
  • Create and maintain clear test plans, test cases, and defect documentation
  • Support and mentor junior testers as the team grows
  • Champion shift-left testing and continuous improvement across the engineering function

Requirements

  • Strong experience in both manual and automation testing
  • Hands-on experience building automation frameworks using Playwright (preferred)
  • Strong scripting ability in C# / .NET
  • Experience testing modern web applications (HTML, CSS, JavaScript)
  • Experience with API testing tools such as Postman or similar
  • Understanding of SQL for data validation and test setup
  • Experience working within Agile environments
  • Hands-on experience integrating tests within CI/CD pipelines
  • Confidence performing negative and boundary testing
  • Ability to operate in a fast-paced, scale-up environment where processes are still being refined

Nice to have

Experience mentoring or supporting junior testers is highly desirable

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