Hiring a LevelDB developer is beneficial because they bring expertise in managing data storage through Google's open-source key-value storage library. They can efficiently handle large amounts of data, ensure high performance, and provide quick data retrievals. Their knowledge in creating sorted data structures further enhances the application's speed and responsiveness. Additionally, they can implement data compression techniques to save storage space, making your systems more efficient. Their skills can significantly improve the scalability, performance, and efficiency of your data-driven applications.