Automation Tester (C# .Net)

Automation Tester
Remote
September 16, 2026
Full Time
Application ends: December 15, 2026
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Job 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

  • Design, develop, and maintain automated E2E tests using C# / .NET and NUnit
  • Write behavior-driven test scenarios using Reqnroll / SpecFlow (Gherkin) and shared test helpers
  • Build and maintain automated REST API / Web API tests, validating status codes, payloads, and security headers
  • Write clean, maintainable, and reusable test code following engineering best practices
  • Investigate test failures, perform root cause analysis, and raise clear, reproducible defect reports
  • Integrate and run automated tests within CI/CD pipelines and report on results
  • Collaborate with backend engineers, frontend engineers, and product managers to define acceptance criteria and test coverage
  • Improve test reliability, stability, execution time, and reporting/observability
  • Document test approaches, coverage, and engineering decisions

What You’ll Bring to Numerator

  • Experience: 3 to 5 years
  • Experience with C# / .NET
  • Understanding of automated testing principles and the testing pyramid (unit, integration, E2E)
  • Familiarity with a unit/test framework such as NUnit, xUnit, or MSTest
  • Solid understanding of REST principles and how to test Web APIs
  • Good problem-solving and debugging skills
  • Understanding of software engineering fundamentals and clean code practices
  • Experience working with relational databases and writing SQL queries to set up and verify test data
  • Experience with Git and modern development workflows
  • Strong communication and collaboration skills

Are you interested in this position?
Apply by clicking on the “Apply Now” button below!
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