As a Manual QA Engineer in Warsaw, you will be responsible for designing and executing test cases, maintaining testing documentation, and performing API, feature, and regression testing. This role requires 3+ years of experience in Quality Assurance and WEB testing, with at least 2 years in API and back-end services testing. A strong understanding of software testing theory, methodologies, client-server architecture, and UI/UX best practices is essential. You will also need experience with Jira/Confluence and test case management software, along with familiarity with Git Flow and Agile concepts. The role involves analyzing failed tests, reporting issues, and contributing to process improvements.