Senior Software Engineer in Test, Python

Roku
Cambridge, United KingdomPosted 13 March 2026

Job Description

Teamwork makes the stream work. Roku is changing how the world watches TV Roku is the #1 TV streaming platform in the U.S., Canada, and Mexico, and we've set our sights on powering every television in the world. Roku pioneered streaming to the TV. Our mission is to be the TV streaming platform that connects the entire TV ecosystem. We connect consumers to the content they love, enable content publishers to build and monetize large audiences, and provide advertisers unique capabilities to engage consumers. From your first day at Roku, you'll make a valuable - and valued - contribution. We're a fast-growing public company where no one is a bystander. We offer you the opportunity to delight millions of TV streamers around the world while gaining meaningful experience across a variety of disciplines. About The Role With millions of users worldwide, our products have earned a reputation for "just working" seamlessly right out of the box, almost like magic. This seamless experience is no accident; it's a testament to our commitment to creating products that are not just intuitive but downright obvious. At the heart of this commitment is the Roku OS QA Team, dedicated to rigorously testing every product and feature to ensure we deliver the most reliable streaming media platform in the industry. Our mission is simple: help people effortlessly find and stream the content they love. We achieve this through cutting-edge technology and engineering, always putting the customer at the center of everything we do. About the Team As part of our team, you'll leverage your diverse skills to support both Software Engineers and QA Engineers, tackling the daily challenges of their roles. Your specialist knowledge will be invaluable in suggesting improvements to enhance quality and streamline workflows, ensuring we continue to exceed our customers' expectations. As a Senior Software Engineer (SDET), you'll be the transformational force that revolutionizes our testing approach. You'll leverage AI and advanced analytics to identify quality gaps, architect intelligent testing solutions, and establish new standards for test effectiveness that go beyond simple coverage metrics. What you'll be doing Design and implement intelligent test analysis systems that identify quality gaps, predict failure patterns, and optimize test effectiveness Design systems that collect, analyse and act on the testing data to continuously improve on the quality processes Experience with systematic regression tracking and implementing process to prevent regression reoccurrence Establish new methodologies for measuring and improving test quality beyond simple pass/fail metrics, focusing on regression prevention and production reliability Leverage AI-powered tools for automated failure analysis, root cause identification, and test flakiness scoring Define and implement architectural patterns that make testing more effective, maintainable, and aligned with business impact We're excited if you have 5+ years of hands-on experience with test architecture and automation systems design 8+ years of programming experience across multiple languages with Python Proven track record in driving test transformation: Experience leading initiatives that significantly improved test effectiveness and reduced production issues AI expertise for testing: Ability to design, implement, and optimize solutions leveraging LLMs, and predictive analytics for quality assurance Knowledge of continuous integration tools (Jenkins/GitLab, TeamCity, AWS) and their optimization for quality gates Advanced test analysis skills: Experience with test flakiness analysis, failure pattern recognition, and automated root cause identification Excellent verbal and written communication skills with ability to influence senior leadership and cross functional teams on quality initiatives Some working knowledge of C++ Leadership experience mentoring engineers and driving organizational change in testin ... (truncated, view full listing at source)
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