Automation Tester (C# .Net)
Numerator • India
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Role & seniority
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Automation Tester (level not specified)
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Focus: automated end-to-end (E2E) testing for backend services/APIs in the Microsoft .NET ecosystem
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Stack/tools
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C# / .NET, NUnit
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BDD: Reqnroll / SpecFlow, Gherkin
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API testing for REST API / Web API (status codes, payload validation, security headers)
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CI/CD pipelines (integrate/run automated tests; report results)
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Test helpers/shared utilities
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Cloud infrastructure exposure (details not specified)
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Top 3 responsibilities
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Design, develop, and maintain automated E2E test suites in C#/.NET using NUnit
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Create BDD scenarios and reusable test helpers (Reqnroll/SpecFlow + Gherkin)
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Implement and maintain REST/Web API tests validating responses and security headers; ensure reliability
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Must-have skills
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Strong software engineering fundamentals and attention to detail
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Proficient C#/.NET test automation with NUnit
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Ability to write BDD scenarios (SpecFlow/Reqnroll, Gherkin)
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Strong debugging/root-cause analysis; ability to produce clear defect reports
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CI/CD integration and test result reporting
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Nice-to-haves
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Experience with cloud infrastructure and distributed systems at scale
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Experience improving test observability (reporting, stability, execution time)
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Experience partnering with product/engineering teams on acceptance criteria and test coverage
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Location & work type
Full Description
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
