Hiring a JAAS (Java Authentication and Authorization Service) developer can significantly enhance your software's security. JAAS developers have expertise in Java security frameworks, enabling them to provide robust authentication and authorization solutions. They can design and implement secure access controls, ensuring that only authorized users can access sensitive information. Furthermore, their skills can extend to areas like single sign-on and role-based access control, ensuring a seamless and secure user experience. Their expertise can help in mitigating potential security risks, and thus, protect your software from breaches or attacks.