Testing microservices-based systems with Selenium requires a thoughtful approach since these architectures involve multiple independent services. Focus Selenium on critical end-to-end UI flows while handling most validations at the API level for speed and reliability. Use tools like Docker and Selenium Grid for parallel, containerized test execution. Implement service virtualization to mock unavailable services during UI testing. Integrating Selenium with CI/CD pipelines ensures faster, automated feedback on UI changes. Many professionals enhance their skills through a Selenium certification course, which often covers integration techniques for microservices environments, helping testers build more stable, scalable, and efficient automation frameworks.