Hiring an AndroidAnnotations developer can greatly streamline your Android app development process. They are proficient in reducing boilerplate code, simplifying your code base, and enhancing readability and maintainability. They can effectively use AndroidAnnotations, an open-source framework, to inject views, extras or system services into your code, which speeds up development time significantly. Their expertise can also help in handling UI threads, background tasks, or REST clients more efficiently. They not only improve productivity but also ensure the creation of high-quality and optimized Android applications.