The Lead QA will establish the whole QA process and train junior QA, create a requirement analysis system for long-term internal QA purposes, and construct test cases. They will also create build releases, track changes, and ensure submission candidates meet release criteria. The role involves researching, identifying, reporting defects, and completing regular test plans across iOS and Android platforms. Collaboration with the Game Team to ensure quality standards and development process is crucial. The candidate needs to prioritize bugs and communicate the impact of critical issues.