Develop, document, and execute detailed test plans, test cases, and test scripts. Perform comprehensive manual testing, including functional, regression, integration, API, and performance testing. Collaborate with Product, Development, and DevOps teams. Identify, log, track, and verify defects. Provide QA input during code reviews. Support testing integration into CI/CD pipelines. Analyze test results and communicate insights. Improve QA processes, tools, and methodologies. Participate in Agile ceremonies.