Senior Quality Engineer, Automation & API Testing

The Senior Quality Engineer is responsible for driving quality across the software development lifecycle through a strong focus on test automation, API validation, quality engineering practices, and continuous delivery. This role partners closely with Engineering, Product, Architecture, and DevOps teams to establish testing strategies, improve automation coverage, identify quality risks early, and enable rapid, reliable releases.

The Senior QE serves as a quality advocate and technical leader, helping teams adopt scalable automation frameworks, shift-left testing practices, and data-driven quality standards. The role is expected to operate independently, influence engineering decisions, and mentor team members on quality engineering best practices.

Define and execute comprehensive quality strategies aligned with product and engineering objectives.

Lead test planning activities and establish risk-based testing approaches across initiatives.

Review requirements, architectures, and designs to identify quality risks and testability concerns early.

Establish quality gates, standards, and automation objectives for development teams.

Provide technical leadership on quality engineering practices across multiple products or services.

Mentor Quality Engineers and development teams on automation, testing methodologies, and quality best practices.

Design, develop, and maintain robust API and service-level automation frameworks.

Validate REST, GraphQL, and microservice-based architectures through automated testing.

Create automated tests covering functional, integration, contract, regression, and negative testing scenarios.

Validate authentication, authorization, data integrity, error handling, and security controls across services.

Perform data validation through API responses, databases, queues, and downstream integrations.

Collaborate with developers to improve API testability and observability.

Design and maintain scalable automation frameworks for UI, API, integration, and end-to-end testing.

Develop reusable automation libraries, utilities, and test data management solutions.

Drive automation-first testing approaches, minimizing reliance on manual regression testing.

Continuously improve automation reliability, execution speed, and maintainability.

Measure automation effectiveness using coverage, execution, defect detection, and quality metrics.

Ensure automated tests are integrated into CI/CD pipelines and support continuous delivery goals.

Validate complex workflows across distributed systems, microservices, and third-party integrations.

Design test strategies for highly integrated cloud-based applications.

Conduct integration and system testing to ensure end-to-end business process validation.

Identify risks associated with cross-system dependencies and recommend mitigation strategies.

Define and execute performance, scalability, and reliability testing approaches.

Analyze application behaviour under load and identify performance bottlenecks.

Support security testing initiatives by validating authentication, authorization, and API security controls.

Collaborate with Engineering teams to improve application resilience and production readiness.

Integrate automated testing into CI/CD pipelines using Azure DevOps, GitHub Actions, or similar platforms.

Ensure quality gates are embedded within deployment pipelines.

Leverage test execution analytics and quality metrics to drive continuous improvement.

Collaborate with DevOps teams to improve environment stability, test data availability, and deployment validation.

Support quality practices within cloud-native and containerized environments.

Evaluate release readiness using risk assessments, automation results, and quality metrics.

Participate in production incident investigations and root cause analysis.

Develop monitoring and validation strategies to ensure quality after deployment.

Analyze defect trends and recommend preventative quality improvements.

7+ years of experience in Quality Engineering, Software Testing, or Test Automation.

Strong experience designing and implementing test automation frameworks .

Advanced experience in API testing and automation using tools such as Postman, Rest Assured, Playwright, Karate, or similar frameworks.

Strong programming/scripting experience with languages such as Java, C#, TypeScript, JavaScript, or Python .

Experience testing distributed systems, microservices, and cloud-native applications .

Strong understanding of software architecture, SDLC, Agile, and DevOps methodologies.

Hands-on experience with CI/CD pipelines and automated quality gates.

Experience with SQL and database validation techniques.

Strong analytical, troubleshooting, and root-cause analysis skills.

Ability to independently drive quality initiatives and influence engineering teams.

Experience with Azure, AWS, or Google Cloud environments.

Experience with containerized platforms such as Docker and Kubernetes.

Experience implementing contract testing and service virtualization.

Experience with performance testing tools such as JMeter, Gatling, or k6.

Experience with observability and monitoring platforms (Application Insights, Datadog, Splunk, Grafana).

Experience in regulated, enterprise, or high-availability environments.

ISTQB Advanced, CSTE, or equivalent certification.

Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership , Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject .

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.