Senior Software Engineer; Testing​/Quality Assurance

Tesco UK

• Welwyn Garden City
• Hybrid
• Full-Time
• Apply by 06-Jun-2025 About the role

We are looking for a Senior Software Engineer to join our engineering team!

In this role, you will play a critical part in ensuring the reliability, performance, and scalability of our software solutions. You will responsible for designing and implementing both manual and automated testing frameworks while partnering with our development teams drive best practices in software quality.

As a senior member of the team, you will act as a QA advocate and partner, supporting developers in writing testable code, improving test coverage, and enhancing CI / CD pipelines. Your expertise will help shape our approach to quality engineering and drive continuous improvement across multiple products and platforms.

• Annual bonus scheme of up to 20% of base salary
• Holiday starting at 25 days plus a personal day (plus Bank holidays)
• Private medical insurance
• 26 weeks maternity and adoption leave (after 1 years’ service) at full pay, followed by 13 weeks of Statutory Maternity Pay or Statutory Adoption Pay, we also offer 4 weeks fully paid paternity leave
• Free 24 / 7 virtual GP service, Employee Assistance Programme (EAP) for you and your family, free access to a range of experts to support your mental wellbeing

• Work closely with product managers and developers to understand product requirements and design.
• Document detailed functional and integration test cases, coordinating with developers, product managers, and stakeholders to ensure complete coverage.
• Develop and implement a test automation strategy that enhances efficiency, scalability, and reliability.
• Implement manual and exploratory testing where required, ensuring comprehensive validation of features.
• Ensure automated solutions are cost-effective and contribute to business goals, providing ROI analysis.
• Collaborate with development teams to integrate quality gates into CI / CD pipelines and improve overall test coverage.
• Advocate for shift-left testing strategies, embedding quality early in the development lifecycle.
• Establish and refine best practices in test automation, performance testing, and non-functional testing.
• Analyse server logs, databases, and system metrics to provide insights into test results and defect analysis.
• Develop mock / stub components to test the functionality of isolated software components.
• Track quality metrics, such as defect densities and open defect counts, and publish test reports.
• Support test infrastructure improvements, integrating tools such as Report Portal, and Mock Server.
• Provide mentoring and guidance to less experienced colleagues, fostering a culture of quality engineering excellence.
• Collaborate with stakeholders, including product managers and engineering leads, to ensure testing strategies align with business needs.
• Lead multiple projects / initiatives, taking ownership of test planning, design, execution, and automation.

• Extensive experience in Quality Engineering, including hands‑on automation and manual testing.
• Strong expertise in test automation frameworks (., Playwright, Selenium, Rest Assured, Karate, Gatling, Cucumber BDD, TestNG).
• Proficiency in programming languages such as Java, Python, or JavaScript.
• Experience in API testing, microservices testing, and web application testing.
• Knowledge of SQL, No
  
  SQL, and pub-sub technologies.
• Hands‑on experience integrating testing tools, including Report Portal, Device Farms, , or Mock Servers.
• Knowledge of cloud infrastructure & CI / CD concepts (., Azure, Jenkins, Sonar Qube, Docker, Kubernetes).
• Familiarity with API contract testing tools (., , Postman, Bruno) and test data management strategies.
• Experience working on Linux / Unix environments.
• Strong understanding of Agile methodologies, Dev Ops, and CI / CD pipelines.
• Proficient in leadership and mentoring, with a dedication to promoting quality and automation through standard methodologies.

• Experience in handling large‑scale and complex integration testing within enterprise environments.
• Knowledge of security testing best practices and regulatory compliance considerations.
• Exposure to…