The Senior QA Engineer role focuses on ensuring the delivery of high-quality, reliable, and maintainable software solutions in an agile environment. Responsibilities include designing and executing test strategies, creating and maintaining test cases and automation scripts, driving integration and functional testing, and influencing quality-first and defect prevention practices. The role also involves mentoring team members, collaborating with Scrum teams, validating functional and non-functional requirements, and supporting continuous improvement of testing processes and tools.