Hiring an AspectJ developer can significantly enhance your software development process. They can provide modularized crosscutting concerns, like logging and transaction management, improving code maintainability and reusability. Their expertise in this aspect-oriented programming (AOP) language helps to minimize code tangling and scattering, leading to a cleaner codebase. They can separate concerns effectively, allowing for easier debugging and testing. Moreover, their knowledge in AspectJ can also contribute to achieving better performance and scalability in your software applications.