Contract QA Engineer responsible for manual and automated testing of mobile and web applications. Duties include creating and executing functional, regression, exploratory, and end-to-end tests; validating across browsers, devices, and operating systems; troubleshooting failures; documenting defects; managing releases; reporting results; monitoring application health; and supporting customer issue investigations. The role requires collaboration across Product, Design, Development, and QA, with experience in SQL, test automation, TestRail, JIRA, CI/CD, and source control.