An Angular developer creates and implements user interface components for web applications using the Angular framework. Responsibilities include designing dynamic and complex web applications, ensuring high performance on mobile and desktop, conducting thorough testing and debugging, collaborating with other team members, and integrating backend services. They also use HTML, CSS, and TypeScript to write clean, maintainable, and testable code, adhering to Angular best practices. They are involved in the entire application lifecycle, focusing on coding, debugging, and providing user support. They also work on improving application performance, functionality, and stability.