Senior Software Development Engineer in Test (SDET)

Job Description

SDET Engineers are involved in requirements analysis, test planning, writing test cases/scripts, test case automation, and execution of all testing (which may include application integration, system, system/network integration, performance testing and acceptance testing) required to ensure that the software is of the highest quality. After the project is released to production, these teammates are also involved to providing support to our internal customer, the technical operation group as well as service management. Besides, this role also plays a significant part of internal process audit and improvement to build efficiencies.

Main Responsibilities / Accountabilities:

• Design, develop, and maintain scalable automated test solutions and frameworks using Python.

• Build and implement automated tests for CLI, UI, API, integration, and end-to-end validation.

• Collaborate with Product Owners, Business Analysts, Developers, and other team members to understand requirements and develop effective test strategies and test cases.

• Drive Quality Engineering standard methodologies throughout the software development lifecycle.

• Participate in test planning, test design, estimation, execution, and release activities within Agile teams.

• Implement functional, integration, and regression testing across multiple platforms, including Linux and Windows environments.

• Identify, document, prioritize, and supervise defects through resolution while performing root cause analysis.

• Integrate automated tests into CI/CD pipelines to support continuous testing and rapid feedback cycles.

• Perform API testing and data validation to ensure application reliability, accuracy, and consistency.

• Work closely with globally distributed teams, ensuring effective collaboration across time zones and functions.

• Use test management tools to run test execution, traceability, reporting, and quality metrics.

• Support and ability to lead continuous improvement initiatives by evaluating and accepting modern testing tools, frameworks, and engineering practices.

Essential Skills & Experience

• Experienced level in Quality Engineering, Test Automation, or SDET roles.

• Work independently within defined parameters, taking ownership of problems within own area of knowledge.

• Strong programming expertise in Python with experience developing reusable automation frameworks.

• Experience implementing Behavior Driven Development (BDD) practices using Robot Framework and Gherkin/Cucumber.

• Strong understanding of software testing methodologies, test build techniques, and Quality Engineering principles.

• Hands-on experience integrating automated testing into CI/CD pipelines.

• Proficiency with source code management tools such as GitLab, Bitbucket, or Git.

• Experience working with TestRail or similar test management platforms.

• Strong experience working within Agile/Scrum development environments.

• Experience testing applications on both Linux and Windows platforms.

• Expertise in cloud-native technologies and platforms such as AWS or Azure.

• Knowledge of containerization and orchestration technologies including Docker and Kubernetes.

• Excellent analytical, debugging, and problem-solving skills.

• Strong communication and collaboration skills with the ability to work effectively in a global environment.

• Proficiency with Networking, TCP/IP

Desired Skills

• Hands-on experience with UI automation frameworks, including Playwright and/or Selenium.

• Familiarity with AI-assisted development platforms including GitHub Copilot, Claude, or similar platforms.

• Experience with Infrastructure as Code (IaC) testing, including exposure to Terraform and Bash scripting.

• Experience with Application Performance testing.

• Experience testing APIs and validating backend data using SQL and other validation techniques.

• Exposure to modern DevOps and cloud-native architectures.

• Understanding of performance, scalability, and reliability testing concepts.

• Experience mentoring team members and promoting Quality Engineering standards.

• Ability to quickly learn and adopt new tools, technologies.

• Relevant certifications in Cloud, DevOps, Agile, or Quality Engineering subject areas.

Career Stage:

London Stock Exchange Group (LSEG) Information:

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.

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