A Test Engineer is a professional responsible for evaluating and ensuring the quality of software products. They design and execute test plans, identify bugs, and verify that the software meets specified requirements. Their work helps to improve the overall user experience by ensuring that applications function correctly and efficiently. Test Engineers often collaborate with developers and project managers to understand the software's intended functionality. They use various testing methods, including manual testing and automated testing tools, to assess performance, security, and usability. This role is crucial in the software development lifecycle, contributing to the success of products like mobile apps and web applications.