Software Development Engineer in Test

Who you are

• 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

What the job involves

• 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
• 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

Benefits

• Medical, Dental & Vision: Your healthcare will be available from Day 1— giving you immediate peace of mind — with best in class coverage and options.
• Parental Leave: Step away with paid time off to focus on family and life’s newest chapter.
• NYC HQ: Collaborate in our lively New York headquarters, with new office space on the way!
• 401(k) Retirement Savings: Plan ahead with our 401(k) program to grow your future. And starting early 2026, employees will be eligible for a company match!
• Flex Giving: ‍Flex Giving empowers employees to support local nonprofits advancing housing stability in the communities we call home.
• Employee Assistance Fund: ‍Confidential financial support to teammates facing unexpected hardships or emergencies.
• Hybrid Work Policy: Work flexibly from home, with in-person collaboration and events that matter.
• Unlimited PTO + Holidays: Take the time you need— whether that’s a vacation, recharge, or simply a long weekend
• Free Flex Subscription: As a Flex employee, you'll have full access to our services without charge.
• GrubHub Credit: Enjoy meal credits while in the office, so you’re fueled for the workday ahead.