A Hibernate ORM developer is proficient in mapping an object-oriented domain model to a relational database, simplifying database operations. They can create more flexible, maintainable code, reducing the need for SQL and database-specific code. This can lead to improved productivity, code quality, and application performance. Moreover, they understand transaction management and caching, essential for developing scalable, high-performance applications. Their expertise can be invaluable in creating robust, efficient data access layers for your applications, ultimately enhancing your software's functionality and user experience.