Senior Software Development Engineer in Test, SDET

Flex

Senior SDET automating API, UI, and integration testing for Flex’s rent-payment FinTech platform. Leading test strategy, CI/CD quality, debugging, and automation framework improvements.

Posted 8/20/2026full-timeRemote • 🇺🇸 United StatesSenior💰 $115,600 - $170,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in test automation and quality assurance, with a strong focus on architecting and optimizing automated test frameworks. Proficient in API, UI, and integration testing, along with CI/CD pipeline integration and advanced debugging techniques.

Highest-signal resume keywords

Test Automation FrameworksAPI TestingCI/CD Pipeline IntegrationRisk AnalysisDebugging and Root Cause Analysis

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Test AutomationProgramming LanguagesAutomation FrameworksSQLTest Strategy Development

Soft Skills

Cross-Functional CommunicationMentorshipCollaboration

Tools & Technologies

PlaywrightCypressSeleniumRestAssuredDataDogNewRelic

Industry Keywords

Quality AssuranceTest DocumentationQuality MetricsProcess ImprovementsDefect Investigation

Tech Stack

Tools & technologies

CypressSeleniumSQL

About the role

Key responsibilities & impact

Own test automation and quality efforts for entire product areas or major features
Architect, implement, and optimize automated test frameworks for complex product areas
Design, develop, and maintain automated API, UI, and integration test suites
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 cross-team process improvements
Analyze test coverage, identify gaps, and improve product quality
Collaborate with engineering, product, and quality leaders on quality initiatives and release planning
Provide technical guidance and mentorship to junior SDETs and QA team members
Review code and test cases for quality and maintainability
Maintain test documentation, reports, and quality metrics
Investigate and resolve complex defects and production issues through debugging and root cause analysis
Advocate for quality and adoption of engineering best practices
Make high-impact technical decisions amid ambiguity and prioritize critical work

Requirements

What you’ll 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, such as Playwright, Cypress, Selenium, and 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, such as DataDog and NewRelic
Excellent cross-functional communication and mentorship skills
Strong written and verbal communication skills; able to collaborate across functions

Benefits

Comp & perks

Competitive medical, dental, and vision
Company equity
401(k) plan with company match
Unlimited paid time off + 13 company paid holidays
Parental leave
Free Flex subscription
Competitive compensation + company equity for full-time non-U.S. employees
Unlimited PTO for full-time non-U.S. employees
Relocation assistance may be available for candidates outside New York, San Francisco, and Salt Lake City