Senior Manual QA Engineer

• Perform manual functional testing of new features and system changes • Validate releases, including end-to-end and integration scenarios • Design and maintain test documentation (test cases, test plans, checklists) • Identify, document, and track defects in a bug-tracking system • Work with API (Postman, Charles Proxy) and UI to investigate issues • Analyze defects and collaborate with developers to identify root causes • Participate in the release process and ensure product stability