A Software Quality Assurance Engineer ensures the delivery of high-quality software through rigorous testing and validation processes. Key responsibilities include creating test plans, executing tests, and reporting defects. Success requires strong analytical skills, attention to detail, and proficiency in testing tools and methodologies. Typically working in agile teams, they collaborate with developers, product managers, and UX designers. Career progression includes roles such as QA Lead or QA Manager, with opportunities to specialize in automation or continuous integration/continuous deployment (CI/CD).