Hiring an Angular.js developer can significantly enhance your web application's functionality and user experience. Angular.js is a robust framework for building dynamic, single-page applications with efficient data binding and dependency injection, reducing the amount of code needed. Developers proficient in Angular.js can create scalable, maintainable, and testable applications. They can also ensure seamless data synchronization between model and view components, leading to improved performance. Their expertise can help you to streamline your project, accelerate the development process, and deliver a high-quality, interactive web application.