The Quality Assurance Engineer III position at Amazon.com Services LLC involves leading the testing of large-scale web applications. The role requires creating comprehensive test plans and test cases while driving continuous improvements to the quality assurance processes using modern web technologies such as HTTP, XML, HTML, CSS, JavaScript, RESTful APIs, and cloud services. The engineer will develop and maintain automated tests for web user interfaces using industry-standard frameworks like Selenium WebDriver, Cypress, or Playwright. Responsibilities include implementing test scripts in languages like JavaScript, Python, or Java, designing and executing both manual and automated test cases, and maintaining CI/CD pipelines. The position also involves collaboration with developers, UX designers, product owners, and customer service professionals throughout the development and testing lifecycle, consulting on technical issues, and providing regular status reports on project progress.