Hiring a Java developer brings multiple benefits. Java introduced significant upgrades like Lambda Expressions and Stream API, enhancing coding efficiency and readability. With this knowledge, developers can optimize your applications, improving performance and scalability. They can also leverage parallel processing capabilities, making your software more responsive. Moreover, they can utilize new APIs and features for date/time, security, and networking, enhancing application functionality. Their expertise in Java can also ensure better maintenance of legacy systems. Overall, a Java developer can provide robust, efficient, and secure solutions for your software needs.