> Markdown version of [/jobs/ext/4227507-senior-software-development-engineer-in-test-sdet](https://www.wearedevelopers.com/jobs/ext/4227507-senior-software-development-engineer-in-test-sdet). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Development Engineer in Test (SDET) - **Company:** Flex Ltd. - **Location:** United States (Remote available) - **Experience:** Expert - **Salary:** $136,000.0 - $170,000.0 - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Automation of Tests, Code Coverage, Code Review, Databases, Continuous Integration, Software Debugging, Monitoring of Systems, Newrelic, Selenium, Software Engineering, Software Testing Automation Framework, Strategies of Testing, Datadog, Sql Optimization, Cypress (Programming Language), ReadyAPI, Integration Tests, Information Technology, Playwright, SDET, Programming Languages - **Published:** October 13, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=c9560074601899e9 ## About the Role * Bachelor's degree in Computer Science or related field, or equivalent experience * 5+ years of experience in software development and test automation * Advanced proficiency in multiple programming languages and test automation frameworks * Deep experience designing, building, and maintaining automation frameworks (e.g., Playwright, Cypress, Selenium, RestAssured) * Strong expertise in API, UI, and integration testing * Proficient in CI/CD pipeline integration and optimization * Skilled in test strategy development, risk analysis, and test architecture * Advanced debugging, troubleshooting, and root cause analysis * Solid understanding of database systems and advanced SQL * Experience with observability and monitoring tools (e.g., DataDog, NewRelic) * Excellent cross-functional communication and mentorship skills * Strong written and verbal communication skills; able to collaborate across functions Life at Flex We understand that it takes a diverse team of highly intelligent, curious, determined, empathetic, and self aware people to grow a successful company. Our HQ is located in New York City, but we have employees located throughout the US, Australia, Canada and South America. We are growing quickly, but deliberately, with a focus on building an inclusive culture. Our dynamic team has incredible perspectives to share, just as we know you do, and we take great pride in being an equal opportunity workplace. ## Description As a Senior SDET at Flex, you will own the test automation and quality efforts for entire product areas or major features. You will architect and optimize automation frameworks, lead test strategy for complex systems, and regularly collaborate across teams to deliver reliable and high-quality releases. This role offers the opportunity to mentor others, drive cross-functional quality improvements, and play a critical part in shaping the future of our engineering excellence. What you'll do * Architect, implement, and optimize automated test frameworks for complex product areas, ensuring high reliability and maintainability * Design, develop, and maintain robust automated test suites for API, UI, and integration testing * Lead test strategy development and perform risk analysis for major features and systems * Integrate automated testing into CI/CD pipelines, supporting continuous integration and delivery processes * Proactively identify systemic quality issues and drive cross-team process improvements to increase coverage and efficiency * Analyze test coverage, identify gaps, and implement solutions to improve product quality * Collaborate closely with engineering, product, and quality leaders on cross-functional quality initiatives and release planning * Provide technical guidance and mentorship to junior SDETs and QA team members, fostering skill development and best practices * Review code and test cases contributed by other engineers for quality and maintainability * Maintain accurate and actionable test documentation, reports, and quality metrics for assigned product areas * Investigate and resolve complex defects and production issues through advanced debugging and root cause analysis * Advocate for quality and champion adoption of best practices within and across engineering teams * Proven ability to lead test strategy and risk analysis while making high-impact technical decisions amid ambiguity and prioritizing what matters most.