{"schemaVersion":"jobsearcher.job.v1","id":"a34eae9ebc99334cc8a3b197","url":"https://jobsearcher.com/jobs/a34eae9ebc99334cc8a3b197","canonicalUrl":"https://jobsearcher.com/jobs/a34eae9ebc99334cc8a3b197","title":"Test Automation Developer / SDET - C#/.NET & Playwright","description":"Senior Test Automation Developer / SDET C#/.NET & PlaywrightLocation: Seattle, WA OnsiteEmployment: Contract 1099Pay: $42/hour on 1099Start: ImmediateBackground Check: RequiredJob DescriptionWe are hiring a Senior Test Automation Developer / SDET for an onsite opportunity in Seattle, Washington.We are looking for a hands-on automation engineer with strong experience building test automation frameworks and developing end-to-end automation across UI, REST API, and data/database layers.The ideal candidate will have strong C#/.NET API automation experience with NUnit combined with modern UI automation using Playwright or Cypress.Key ResponsibilitiesDesign, build, and maintain scalable test automation frameworks from scratchDevelop UI automation using Playwright or CypressBuild REST API automation using C#/.NET and NUnitDevelop end-to-end test strategies covering UI, API, and database/data layersPerform API-driven content validation and work with mocked/stubbed servicesIntegrate automated test suites into CI/CD pipelinesConfigure automated test execution across multiple environmentsImplement parallel test execution and automated reportingExecute tests using dotnet test and work with NUnit/TRX reportingValidate REST APIs, HTTP responses, status codes, payloads, authentication, and business rulesPerform backend/data validation using SQL where requiredTroubleshoot flaky tests and complex UI/API automation failuresFollow Git development practices including branching, pull requests, and code reviewsUse AI-assisted development/testing tools to accelerate automation development, improve test stability, and support debugging/root-cause analysisCollaborate with developers, product teams, and QA engineers in an Agile/Scrum environmentRequired SkillsStrong hands-on C# / .NET development experienceStrong NUnit automation experienceStrong REST API automation using C#/.NETStrong Playwright or Cypress UI automation experienceProven experience building automation frameworks from scratchStrong understanding of REST APIs, HTTP methods/status codes, JSON, and API validationExperience testing across UI + API + database/data layersExperience with Azure DevOps, Jenkins, or GitHub ActionsExperience with dotnet test, NUnit/TRX reporting, environment configuration, and parallel executionStrong Git experience including branching, PRs, merges, and code reviewsExperience with mocks, stubs, or service virtualizationExperience working in Agile/Scrum environmentsHands-on experience using AI tools such as GitHub Copilot or similar tools for test development, debugging, analysis, or automation improvementPreferred QualificationsSenior SDET/Test Automation background with strong coding abilityExperience with TypeScript/JavaScriptSQL/database validation experienceExperience with Docker or containerized test executionExperience troubleshooting CI/CD test failuresExperience designing enterprise-scale automation architectureImportant Before ApplyingThis is an onsite position in Seattle, WA. Candidates must be able to work onsite and should be located within reasonable commuting distance of Seattle or already have a confirmed relocation plan.Pay rate: $42/hour on 1099.Please apply only if you are comfortable with the onsite requirement and stated rate.When applying, please include your current location, work authorization, availability/start date, and a current resume.","company":"Santcore Technologies","rawCompany":"santcore technologies","city":"Seattle","state":"WA","isRemote":false,"isActive":false,"createdAt":"2026-08-13T12:11:10.427Z","occupations":[{"code":"15-1253.00","title":"Software Quality Assurance Analysts and Testers","slug":"software-quality-assurance-analysts-and-testers"},{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1251.00","title":"Computer Programmers","slug":"computer-programmers"}],"industries":[{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Test Automation Developer / SDET - C#/.NET & Playwright","description":"Senior Test Automation Developer / SDET C#/.NET & PlaywrightLocation: Seattle, WA OnsiteEmployment: Contract 1099Pay: $42/hour on 1099Start: ImmediateBackground Check: RequiredJob DescriptionWe are hiring a Senior Test Automation Developer / SDET for an onsite opportunity in Seattle, Washington.We are looking for a hands-on automation engineer with strong experience building test automation frameworks and developing end-to-end automation across UI, REST API, and data/database layers.The ideal candidate will have strong C#/.NET API automation experience with NUnit combined with modern UI automation using Playwright or Cypress.Key ResponsibilitiesDesign, build, and maintain scalable test automation frameworks from scratchDevelop UI automation using Playwright or CypressBuild REST API automation using C#/.NET and NUnitDevelop end-to-end test strategies covering UI, API, and database/data layersPerform API-driven content validation and work with mocked/stubbed servicesIntegrate automated test suites into CI/CD pipelinesConfigure automated test execution across multiple environmentsImplement parallel test execution and automated reportingExecute tests using dotnet test and work with NUnit/TRX reportingValidate REST APIs, HTTP responses, status codes, payloads, authentication, and business rulesPerform backend/data validation using SQL where requiredTroubleshoot flaky tests and complex UI/API automation failuresFollow Git development practices including branching, pull requests, and code reviewsUse AI-assisted development/testing tools to accelerate automation development, improve test stability, and support debugging/root-cause analysisCollaborate with developers, product teams, and QA engineers in an Agile/Scrum environmentRequired SkillsStrong hands-on C# / .NET development experienceStrong NUnit automation experienceStrong REST API automation using C#/.NETStrong Playwright or Cypress UI automation experienceProven experience building automation frameworks from scratchStrong understanding of REST APIs, HTTP methods/status codes, JSON, and API validationExperience testing across UI + API + database/data layersExperience with Azure DevOps, Jenkins, or GitHub ActionsExperience with dotnet test, NUnit/TRX reporting, environment configuration, and parallel executionStrong Git experience including branching, PRs, merges, and code reviewsExperience with mocks, stubs, or service virtualizationExperience working in Agile/Scrum environmentsHands-on experience using AI tools such as GitHub Copilot or similar tools for test development, debugging, analysis, or automation improvementPreferred QualificationsSenior SDET/Test Automation background with strong coding abilityExperience with TypeScript/JavaScriptSQL/database validation experienceExperience with Docker or containerized test executionExperience troubleshooting CI/CD test failuresExperience designing enterprise-scale automation architectureImportant Before ApplyingThis is an onsite position in Seattle, WA. Candidates must be able to work onsite and should be located within reasonable commuting distance of Seattle or already have a confirmed relocation plan.Pay rate: $42/hour on 1099.Please apply only if you are comfortable with the onsite requirement and stated rate.When applying, please include your current location, work authorization, availability/start date, and a current resume.","datePosted":"2026-08-13T12:11:10.427Z","dateModified":"2026-08-13T12:11:10.427Z","hiringOrganization":{"@type":"Organization","name":"Santcore Technologies","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Seattle","addressRegion":"WA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"a34eae9ebc99334cc8a3b197"},"url":"https://jobsearcher.com/jobs/a34eae9ebc99334cc8a3b197"}}