Test Engineer (.NET / JavaScript) w Kraków, Polska

Introduction & Summary A highly motivated Test Engineer with expertise in .NET and JavaScript is sought for a pivotal role in a modernization program. The successful candidate will have a strong background in test automation, particularly in developing frameworks and integrating testing into CI/CD processes. The role offers a unique opportunity to contribute to the migration of legacy applications to a cloud-native architecture while ensuring quality through effective testing practices. Location Kraków, HYBRID WORK Contract type Contract B2B ( Long Term) Rate: 140-155 PLN/h + VAT Working time 09:00-17:00 CET Main Responsibilities Own and evolve the automated testing processes across the portfolio. Design and implement test strategies across various testing layers. Build and maintain E2E automation and backend integration tests. Integrate automated tests into CI/CD processes. Champion best practices in testing and quality assurance. Validate data flows and manage test data. Drive root-cause analysis and manage flaky tests. Collaborate with developers on acceptance criteria and code review. Support UAT coordination and document test results. Key Requirements 5+ years of commercial experience in test automation. Strong coding skills in C# / .NET. Expertise in JavaScript / TypeScript for test automation. Proficient with Playwright or Selenium. Experience with xUnit / NUnit and Vitest / Jest. Familiarity with Azure DevOps CI/CD integration. Practical SQL experience (MSSQL / Azure SQL). Proficient in REST API testing. Self-driven and able to set standards for automation. Good Git practices and English communication skills (B2+). Nice to Have Knowledge of Azure services (App Service, Azure SQL, etc.). Experience with Azure Data Factory and ETL validation. Familiarity with Power BI report testing. Understanding of contract testing and OpenAPI validation. Experience with performance testing tools like k6 / JMeter. Awareness of Infrastructure as Code principles. Knowledge of observability and monitoring solutions. ISTQB Advanced or relevant certifications.