Remote SDET: Elite C#/.NET Test Automation Engineer

CDM Technology; United States; Remote; USD 100,000 - 140,000; Full time

Job summary

CDM Technology is seeking a hands-on Software Development Engineer in Test (SDET) to design, develop, and maintain automated test solutions for .NET-based software applications. The role emphasizes writing production-grade code, building reliable testing frameworks, and integrating tests into CI/CD pipelines.

The ideal candidate will have deep experience with C# and the .NET ecosystem, unit testing frameworks (xUnit, NUnit, MSTest), and MOQ for mocking.

Qualifications

• 5+ years of software development or test automation experience, with hands-on coding in C# and .NET.
• Strong proficiency in C#, object-oriented programming, and software design principles.
• Experience building and maintaining automated testing frameworks.
• Strong experience with unit testing frameworks such as xUnit, NUnit, or MSTest.
• Hands-on experience with MOQ or similar mocking frameworks.
• Experience with API testing, integration testing, and automated regression testing.
• Familiarity with CI/CD pipelines and automated build and test processes.

Responsibilities

• Design, develop, and maintain automated test frameworks and test suites using C# and .NET technologies.
• Write high-quality, reusable, and maintainable code for unit, integration, and automated regression testing.
• Implement unit tests using frameworks such as xUnit, NUnit, or MSTest.
• Utilize MOQ or similar mocking frameworks to isolate dependencies and validate application behavior.
• Develop automated tests for APIs, backend services, and distributed software components.
• Validate RESTful APIs using tools and libraries such as REST clients, Postman, or HttpClient.
• Integrate automated tests into CI/CD pipelines to support continuous testing and rapid feedback.
• Collaborate with software developers, architects, and product teams to identify test scenarios, edge cases, and potential failure points.
• Analyze test failures, debug application behavior, identify root causes, and work with development teams to resolve defects.
• Improve test coverage, test reliability, execution speed, and overall software quality.
• Participate in code reviews, design discussions, and Agile development activities.
• Contribute to testing best practices, coding standards, and continuous improvement of the development and testing process.

Skills

C#

.NET

Unit testing

MOQ

API testing

CI/CD

Git

Tools

xUnit

NUnit

MSTest

Job description

CDM Technology is seeking a hands-on Software Development Engineer in Test (SDET) to design, develop, and maintain automated test solutions for .NET-based software applications. The role emphasizes writing production-grade code, building reliable testing frameworks, and integrating tests into CI/CD pipelines.

The ideal candidate will have deep experience with C# and the .NET ecosystem, unit testing frameworks (xUnit, NUnit, MSTest), and MOQ for mocking.