Job Description
Senior Test Engineer
Salary: Up to £80,000 + benefits
Location: Remote
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.
Responsibilities as a Senior Test Engineer:
* 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 for the Senior Test Engineer:
* 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.
* Experience mentoring or supporting junior testers is highly desirable.
If you are a Senior Test Engineer who enjoys building frameworks from scratch, raising quality standards, mentoring others, and creating robust automation foundations in a growing tech business, this role is for you.
**Due to the high volume of applications, not all applicants will receive feedback.**