Hiring a GraphQL & Relay developer is beneficial for managing huge volumes of data in your applications. GraphQL enables efficient data loading by allowing clients to request specific data, reducing unnecessary network overhead. Relay, on the other hand, provides a structure to JavaScript applications, making them easier to understand and maintain. Together, these technologies can greatly improve app performance, user experience, and developer productivity. A skilled GraphQL & Relay developer can help you leverage these benefits, ensuring your applications are efficient, scalable, and maintainable.