Assist in testing web and mobile applications to ensure functionality, usability, and performance while collaborating with developers and designers to identify bugs, report issues, verify fixes, prepare test cases, execute test plans, and document results for high-quality software delivery, requiring basic knowledge of manual testing, test case preparation, and defect reporting, familiarity with testing tools and techniques, strong attention to detail, problem-solving ability, valuable communication, and the ability to work collaboratively and learn quickly.