Automation Tester (C# .Net)
About this role
Role Overview
We are looking for an Automation Tester with a strong interest in the Microsoft .NET ecosystem to design, build, and maintain automated end-to-end (E2E) test suites for our backend services and APIs. The role requires strong attention to detail, solid problem-solving capability, and good software engineering fundamentals applied to test automation.
The role will expose you to API and service-level testing, behavior-driven development (BDD), cloud infrastructure, CI/CD pipelines, and owning the quality and reliability of software across distributed systems at scale.
Key Responsibilities
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Design, develop, and maintain automated E2E tests using C# / .NET and NUnit
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Write behavior-driven test scenarios using Reqnroll / SpecFlow (Gherkin) and shared test helpers
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Build and maintain automated REST API / Web API tests, validating status codes, payloads, and security headers
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Write clean, maintainable, and reusable test code following engineering best practices
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Investigate test failures, perform root cause analysis, and raise clear, reproducible defect reports
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Integrate and run automated tests within CI/CD pipelines and report on results
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Collaborate with backend engineers, frontend engineers, and product managers to define acceptance criteria and test coverage
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Improve test reliability, stability, execution time, and reporting/observability
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Document test approaches, coverage, and engineering decisions
Company at a glance
Numerator is a data and tech company bringing speed and scale to market research. Numerator blends first-party data from over 1 million US households with advanced technology to provide unparalleled 360-degree consumer understanding for the market research industry that has been slow to change. Headquartered in Chicago, IL, Numerator has more than 5,400 employees worldwide. The majority of Fortune 100 companies are Numerator clients.
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