Senior Software Development Engineer in Test (SDET)

Flex is a growth-stage FinTech company headquartered in NYC, focused on creating a better rent payment experience. As a Senior SDET, you will own test automation efforts, architect frameworks, and collaborate across teams to ensure high-quality releases.

Responsibilities:

• 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

Requirements:

• Bachelor's degree in Computer Science or related field, or equivalent experience
• 4+ 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
• Proven ability to lead test strategy and risk analysis while making high-impact technical decisions amid ambiguity and prioritizing what matters most