Hiring an Angular / developer can greatly enhance your web development projects. They are skilled in creating dynamic and responsive single-page applications. With their expertise, you can leverage Angular's features like two-way data binding, dependency injection, and modularization which promote clean and reusable code. Their knowledge in TypeScript also ensures type-safety, reducing runtime errors. Angular / developers can also utilize Angular's robust testing features to ensure the reliability of your application. In essence, they can help in building scalable, efficient and maintainable web applications, ultimately improving user experience and engagement.