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Senior Software Development Engineer in Test (SDET)
Flex, Remote - Global +1
The role
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 will do
- Architect, implement, and optimize automated test frameworks for complex product areas, ensuring high reliability and maintainability
What you need
- 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
- Strong, hands-on Playwright automation experience, including building scalable, maintainable, and stable suites (page objects, fixtures, parallelization, flaky-test reduction, and CI execution)
- Hands-on experience with performance and load testing using k6 (scripting scenarios, defining thresholds, and analyzing results to find bottlenecks) * 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), including correlating performance test results with application metrics and traces
- Excellent cross-functional communication and mentorship skills
- Strong written and verbal communication skills; able to collaborate across functions
Tier 1 (NYC/Bay Area, Los Angeles, Seattle)
Tier 2 (Austin, Washington D.C. Philadelphia, San Diego, Chicago, Atlanta)
$122,400—$153,000 USD
Tier 3 (Salt Lake City, all other USA cities)
$115,600—$144,500 USD
Life at Flex
Offices
Roles posted in New York, San Francisco, and Salt Lake City are hybrid positions with on-site expectations of 2-3 days per week in our local offices. For candidates outside of these areas, you may be eligible for our relocation assistance program.
Pay and benefits
Compensation
Flex takes a market-based approach to pay, and compensation may vary depending on your primary work location. Work locations are categorized into one of three tiers based on a cost of labor index for that geographic area. The successful candidate’s starting pay will be commensurate with their experience, qualifications, and Flex’s internal leveling guidelines and benchmarks.
Benefits
View our benefits and more at getflex.com/careers.
About Flex
Flex is a growth-stage, NYC headquartered FinTech company that is building the payment layer for life's financial obligations, giving households one place to see, split, and pay their bills around how they live and get paid. By offering greater choice over how and when payments are made and allowing eligible on time payments to help build a positive credit history, Flex puts households back in control of their cash flow.
That work brings together people with different perspectives who challenge the status quo and take ownership of solving difficult problems. For you, that means doing the best work of your career next to people who make you better, and together bringing ideas to life that make a real impact for the people we serve.
Legal notes
Building a successful company takes a diverse team of intelligent, curious, determined, empathetic, and self-aware people. Our headquarters is in New York City, with employees across the US, Australia, Canada, and South America. We’re growing quickly and deliberately, with a focus on building an inclusive culture. We value the perspectives our people bring and take pride in being an equal opportunity workplace.
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