Senior Test Engineer

Senior Test Engineer

Department: Technology & Data

Employment Type: Full Time

Location: Trimble Offices, Morley

Description About the team

At Vintage Cash Cow, technology is how we scale impact. Every customer journey, from sending in pre loved items to getting paid, is powered by the systems we design, the products we build, and the data we unlock. Our Technology & Data team is at the heart of this transformation, driving greenfield product development, experimenting with fresh ideas, and bringing innovative solutions to life. We're building modern, scalable, and customer focused platforms that set the standard for the re commerce industry. This is a team where curiosity meets craft: blending creativity, technical excellence, and a product mindset to deliver experiences that feel simple, rewarding, and future proof.

About the role

We're looking for a Senior Test Engineer to lead quality assurance across Vintage Cash Cow's customer facing websites and front end applications and mentor a team of testers. This isn't just about finding bugs-it's about building a culture of quality from the ground up. You'll be designing and implementing automated test frameworks using Playwright and C#, guiding manual testing efforts, and ensuring our customers receive reliable, polished experiences every time.

With a keen eye for detail and a product mindset, you'll collaborate closely with developers, product managers, and designers to catch issues early and champion quality throughout the development lifecycle. You'll manage and develop junior testers, establish testing best practices, and drive continuous improvement in how we deliver software. If you're passionate about quality, love mentoring others, and want to make a real impact-you'll thrive here.

This role may require you to work from the Leeds offices from time to time, travel to our European location and other international locations as we scale, and provide out of hours support when needed.

Getting Started

• Immerse yourself in our systems, products, existing test coverage, and team workflows.
• Begin building automated test suites using Playwright and C#.
• Execute manual testing and establish quality standards for new features.
• Work closely with developers and product managers to understand requirements and define test strategies.
• Get to know the testing team and begin supporting junior testers.

Establishing Your Impact

• Take ownership of test automation strategy and expand Playwright coverage across critical user journeys.
• Partner with product managers and developers to ensure quality is built in from the start.
• Manage and mentor junior testers, helping them grow their manual and automation skills.
• Define and establish testing practices, introducing modern tools and setting quality benchmarks.

Driving Excellence

• Own quality assurance end to end: from test planning, through execution, to release sign off.
• Champion a culture of quality, continuous improvement, and shift left testing practices.
• Lead and develop junior testers, elevating the entire team's testing skills and career growth.
• Stay current with testing tools and techniques, proposing innovations that improve efficiency and coverage.

Key Goals & Objectives

• Build and maintain comprehensive automated test suites using Playwright and C#, integrated into CI/CD pipelines.
• Ensure reliable, high quality releases that support Vintage Cash Cow's growth and customer experience.
• Champion a quality first mindset, catching issues early and preventing defects from reaching customers.
• Build a high performing testing team by managing and mentoring junior testers, sharing knowledge, and raising quality standards.
• Continuously improve testing practices, leveraging modern automation tools and integrating with development workflows.
• Stay ahead of the curve, exploring new testing techniques and tools that improve coverage and efficiency.

Key Responsibilities Test Automation

• Design, build, and maintain automated test suites using Playwright and C#.
• Test front end web applications across our brand portfolio, ensuring consistent quality and user experience.
• Own the test automation framework end to end: from strategy and implementation to CI/CD integration.
• Write clean, maintainable test code following best practices and modern patterns.

Manual Testing & Quality Assurance

• Plan and execute manual testing for new features, regression, and exploratory testing.
• Create and maintain test plans, test cases, and defect reports with clear documentation.
• Work closely with developers to identify root causes and verify fixes.

Collaboration & Process

• Partner with product managers and developers to understand requirements and define acceptance criteria.
• Participate in sprint planning, stand ups, and retrospectives as a quality advocate.
• Provide clear release readiness assessments and risk analysis.
• Integrate automated tests into CI/CD pipelines (Azure DevOps, GitHub Actions).

Team Leadership & Growth

• Manage and mentor junior testers, supporting their growth in both manual and automation skills.
• Conduct test reviews and pair testing sessions to share knowledge and improve quality.
• Champion testing best practices and advocate for quality across the engineering team.

Innovation & Continuous Improvement

• Stay current with testing tools, frameworks, and methodologies, recommending improvements.
• Propose and lead initiatives to improve test coverage, speed, and reliability.
• Own and evolve testing standards and processes to drive continuous improvement.

Skills, Knowledge and Expertise

• Strong experience in software testing, with a proven track record in both manual and automated testing.
• Proficient with Playwright for end to end test automation, with experience designing and maintaining test frameworks.
• Proficiency in C# for writing automated tests and test utilities.
• Understanding of web technologies (HTML, CSS, JavaScript) for effective UI testing.
• Experience with API testing tools (Postman, REST Assured, or similar).
• Familiarity with SQL for data validation and test setup.
• Knowledge of Agile practices, Git, and CI/CD pipelines (Azure DevOps, GitHub Actions).
• Proficient with test management tools (Azure Test Plans, TestRail, or similar), including test planning, execution tracking, and reporting.
• Experience with performance testing tools (k6, JMeter, or similar) to identify bottlenecks and ensure system reliability.
• Understanding of accessibility testing principles and tools to ensure inclusive user experiences.
• A quality mindset: attention to detail, curiosity, and a passion for delivering excellent user experiences.
• Experience managing or mentoring junior testers, with a passion for developing others.