Senior Software Development Engineer in Test (SDET) - Remote

Overview

Flex is a growth-stage, NYC headquartered FinTech company that is creating the best rent payment experience. It’s hard to believe that it’s 2026 and paying rent on time is expensive, inflexible, and difficult. We’re here to change that! Flex enables our users to pay rent throughout the month on a schedule that better fits their finances and budget. Our mission is to empower as many renters as possible with flexibility over their most significant recurring expense. After deliberately keeping a stealth profile as we built up unprecedented investor support and an enthusiastic user base, we are looking for motivated individuals to help us keep our mission growing. Will you be a part of the team?

In Short

• Architect, implement, and optimize automated test frameworks for complex product areas.
• 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.
• Identify systemic quality issues and drive process improvements.
• Analyze test coverage and implement solutions to improve product quality.
• Collaborate with engineering, product, and quality leaders.
• Provide technical guidance and mentorship to junior SDETs and QA team members.
• Review code and test cases for quality and maintainability.
• Investigate and resolve complex defects and production issues.

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 with automation frameworks (e.g., Playwright, Cypress, Selenium).
• Strong expertise in API, UI, and integration testing.
• Proficient in CI/CD pipeline integration and optimization.
• Skilled in test strategy development and risk analysis.
• Advanced debugging and troubleshooting skills.
• Solid understanding of database systems and advanced SQL.
• Experience with observability and monitoring tools (e.g., DataDog, NewRelic).

Benefits

• Competitive medical, dental, and vision available from Day 1.
• Company equity.
• 401(k) plan with company match.
• Unlimited paid time off + 13 company paid holidays.
• Parental leave.
• Flex Cares Program.
• Free Flex subscription.