Senior QA Automation Engineer

About the role

Greencastle Digital, a company in the betting and gaming industry with a new Development Centre in Belgrade, is looking for an experienced Senior QA Automation Engineer. The role reports to the QA Lead and works in a hybrid pattern. You will architect and implement automated test frameworks and drive best practices in test automation for UI and API layers.

Key responsibilities

• Design, develop and maintain automated test frameworks with Selenium, Appium, TestNG, Cucumber (BDD), JUnit, NUnit, Sikuli (Java) and Playwright, ReqnRoll (C#).
• Develop and run automated tests for RESTful APIs.
• Define and implement test strategies for new and existing features across web, mobile, games and backend services.
• Integrate automated tests into CI/CD pipelines.
• Collaborate with developers, product managers and other QA engineers.
• Write clean, documented test code and identify, document and track defects to resolution.
• Mentor junior QA engineers and maintain technical documentation.

Required profile

• Minimum 8-10 years of hands-on experience in QA automation.
• Deep understanding of QA methodologies, test planning and defect management.
• Experience in agile environments; strong problem-solving, attention to detail, communication and teamwork skills.

Required skills

• Selenium WebDriver, Appium, TestNG, Sikuli with Java, and Playwright with C#.
• BDD frameworks such as Cucumber and ReqnRoll.
• RESTful API testing tools such as RestAssured or Postman.
• CI/CD tools such as Jenkins, Azure DevOps or GitLab CI.
• Advanced Java and C#/.NET, Git, Maven and .NET CLI.

What we offer

• A newly established Development Centre in a collaborative, innovative environment.
• Opportunities for continuous learning and career growth.
• A hybrid work pattern balancing remote and on-site collaboration.

To apply, send your resume and a cover letter explaining your relevant experience and interest.