Software Development Engineer in Test (SDET) Resume Example
Professional SDET resume example with ATS-optimized template. Showcase your ability to build test infrastructure, develop testing tools, and write production-quality test code.
Last Updated: 2026-03-10 | Reading Time: 8-10 minutes
Quick Stats
Software Development Engineer in Test (SDET) Resume Example
James Thornton
james.thornton@email.com | (425) 813-9274 | Bellevue, WA
linkedin.com/in/jamesthornton
Professional Summary
SDET with 8+ years of experience building production-grade test infrastructure and developer tools at scale. Designed distributed test execution platform processing 100K+ test runs daily across 500+ microservices. Strong software engineering skills with contributions to both product code and test frameworks, reducing mean time to detect regressions from 6 hours to 12 minutes.
Experience
- •Built distributed test execution platform on AWS Lambda processing 100K+ test runs daily with 99.9% reliability and sub-30-second feedback loops
- •Developed custom test selection algorithm using code change analysis, reducing average CI test suite execution by 68% while maintaining defect detection rate
- •Created mock service framework adopted by 40+ teams, enabling parallel development and reducing integration test environment contention by 80%
- •Contributed 15K+ lines of production code alongside test infrastructure, including API endpoints, data validation logic, and monitoring instrumentation
- •Designed test infrastructure for Azure DevOps, supporting 200+ engineers with flaky test detection and auto-retry mechanisms that improved pipeline reliability by 45%
- •Built chaos engineering framework that uncovered 32 critical resilience gaps before they impacted production
- •Developed load testing platform simulating 1M+ concurrent users, validating Azure service scalability for enterprise launches
- •Led test architecture design reviews for 3 product teams, establishing testing standards that reduced defect escape rate by 55%
Education
Technical Skills
Java • Python • TypeScript • Distributed Systems Testing • Test Infrastructure • CI/CD Pipelines • Mock Services • Chaos Engineering • Load Testing • AWS Lambda • Kubernetes • gRPC Testing
Certifications
- AWS Certified Developer Associate
- ISTQB Advanced Test Automation Engineer
Why This Resume Works:
- Quantified achievements with specific metrics
- Keywords match common job descriptions
- Clean, ATS-compatible formatting
- Strong action verbs throughout
How to Write a Software Development Engineer in Test (SDET) Resume
Professional Summary
Emphasize your dual identity: software engineer AND testing expert. Highlight the scale of test infrastructure you built and your contributions to production code. SDETs are expected to be strong developers.
Work Experience
Show both test infrastructure projects and production code contributions. Quantify test execution speed, reliability improvements, and the developer experience enhancements you delivered.
Skills Section
Lead with programming languages and system design skills. Include test-specific infrastructure (CI/CD, mock services, chaos engineering) alongside general software engineering competencies.
Action Verbs for Software Development Engineer in Test (SDET)s
Software Development Engineer in Test (SDET) Resume Keywords
These keywords appear most frequently in Software Development Engineer in Test (SDET) job descriptions. Include relevant ones in your resume:
Technical Keywords
test infrastructureSDETtest automation platformmock serviceschaos engineeringload testingflaky test detectiontest selectionCI/CDdistributed testingIndustry Keywords
quality engineeringdeveloper productivityshift-left testingcontinuous integrationtest reliabilitydefect preventionengineering velocityTools & Technologies
JUnitTestNGPlaywrightSeleniumGatlingLocustJenkinsGitHub ActionsAWS LambdaDockerKubernetesGrafanaWireMockCommon Mistakes to Avoid
Positioning yourself as a QA tester rather than a software engineer
Emphasize software engineering skills, production code contributions, and the tools you built rather than tests you executed
Not showing infrastructure and platform thinking
Highlight test platforms, frameworks, and developer tools you designed and built at scale
Omitting production code contributions
SDETs at top companies contribute to product code. Show your dual impact on both test infrastructure and product quality
Listing only test execution metrics
Include developer experience improvements, CI/CD pipeline optimization, and team productivity gains from your tools
Software Development Engineer in Test (SDET) Resume FAQs
What is the difference between SDET and QA Automation Engineer?
SDETs are software engineers who specialize in quality. They build test infrastructure, developer tools, and contribute to production code. QA Automation Engineers focus more on writing automated test cases using existing frameworks.
Do SDETs need to write production code?
At top tech companies, yes. SDETs are expected to have the same coding skills as software engineers. Highlight any production code contributions alongside your test infrastructure work.
Which programming languages should an SDET know?
Java, Python, and TypeScript are most in demand. The key is demonstrating strong software engineering skills including system design, data structures, and clean code practices.
How do I show test infrastructure experience?
Describe the test platforms, execution frameworks, and developer tools you built. Quantify their scale (daily test runs, number of teams using them) and impact on engineering velocity.
Is SDET a good career path?
Yes. SDETs at major tech companies earn comparable salaries to software engineers and have strong career growth into Staff SDET, Test Architecture, or Engineering Management roles.
Should I include chaos engineering experience?
Absolutely. Chaos engineering demonstrates advanced quality thinking beyond traditional testing. Describe experiments you ran and the reliability improvements they drove.
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Last updated: 2026-03-10 | Written by JobJourney Career Experts