A Software QA Tester(Quality Assurance Tester) is responsible for ensuring the quality and functionality of software applications by identifying bugs and issues before the product is released. They design and execute manual and automated test cases, perform regression, performance, and security testing, and document defects. QA Testers collaborate closely with developers to resolve issues and ensure the final product meets user expectations and quality standards. Their work helps deliver bug-free, high-performance software by ensuring that all features work as intended and the user experience is seamless.