Own quality across the software development lifecycle through risk-based testing, exploratory testing, automation, and technical investigation. Define test strategies across web, mobile, APIs, and integrations; build reliable automated tests and integrate them into CI/CD. Investigate defects using logs and traces, improve QA processes and tooling, collaborate with Product, Design, and Engineering, and mentor colleagues on effective testing practices. Use AI to support test design, automation, debugging, and defect analysis.