Senior Test Automation Engineer C#, .NET, Playwright, Selenium, Git, GitHub Copilot Gdańsk

DCG Poland; Województwo pomorskie; On-site; PLN 211,685 - 296,359; Full time

Benefits offered by this job

Private medical care

Co-financing for the sports card

Constant support of dedicated consultant

Job summary

DCG Poland is seeking a Senior Test Automation Engineer to own and scale automated test suites for a C# / .NET 8 solution and design robust test automation for UI and APIs. The role requires strong hands-on experience with C#, test frameworks like NUnit, and solid UI automation skills using Playwright or Selenium. Candidates should have excellent English communication skills and at least 5 years of experience in test automation. The company offers private medical care, sports card co-financing, and continuous support from a dedicated consultant.

Qualifications

• Strong hands-on experience with C# and .NET 8.
• Experience with test frameworks like NUnit.
• Solid experience in UI test automation using Playwright/Selenium.
• Experience in API test automation using HttpClient/RestSharp.
• Very good command of English, both spoken and written.
• 5+ years of experience in test automation within .NET-based stacks.

Responsibilities

• Own and scale automated test suites for a C# / .NET 8 solution.
• Design, implement, and maintain test automation for UI and APIs.
• Integrate and maintain test automation within CI/CD pipelines.
• Conduct manual testing when required.

Skills

C# (modern language features)

Test automation

UI test automation

API test automation

BDD (SpecFlow / ReQNRoll)

CI/CD automation

Git knowledge

Testing frameworks (NUnit)

JSON validation

Job description

Senior Test Automation Engineer

• Own and scale automated test suites for a C# / .NET 8 solution
• Design, implement, and maintain test automation for UI and APIs
• Perform UI automation using Playwright / Selenium with Page Object Model
• Implement API automation, including request handling, JSON validation, and schema checks
• Apply BDD practices using SpecFlow or ReQNRoll
• Design and maintain test architecture, including reusable helpers, stable selectors, and flakiness handling (retry/backoff)
• Integrate and maintain test automation within CI/CD pipelines (Bitbucket / Bamboo)
• Perform failure diagnostics and debugging of automated tests
• Conduct manual testing when required, based on project needs
• Collaborate within the team to ensure test quality and stability

Requirements

• Strong hands‑on experience with C# (modern language features) and .NET 8 test code
• Experience with test frameworks such as NUnit and test runners
• Solid experience in UI test automation using Playwright and/or Selenium
• Experience in API test automation using HttpClient and/or RestSharp
• Knowledge of JSON validation and schema checks
• Practical experience with BDD (SpecFlow / ReQNRoll)
• Experience in designing robust test automation architecture
• Hands‑on experience with CI/CD automation (Bitbucket, Bamboo)
• Strong Git knowledge, including code reviews and test pipeline maintenance
• Experience in failure analysis and debugging
• Willingness to perform manual testing when required
• Very good command of English, both spoken and written
• 5+ years of experience in test automation within .NET‑based stacks

Nice to have

• Experience using GitHub Copilot

Offer

• Private medical care
• Co‑financing for the sports card
• Constant support of dedicated consultant