Design, build, and maintain scalable automated testing frameworks for front-end and back-end components. Develop test software using JavaScript, TypeScript, Python, Node.js, WebdriverIO, and pytest; integrate testing into CI/CD pipelines; and validate APIs, databases, SaaS integrations, and third-party endpoints. Collaborate with Agile engineering and DevOps teams to improve testability, automate manual coverage, identify risks, and support reliable product releases.