Hiring an AWS RDS developer is beneficial for managing and scaling your relational databases in the cloud efficiently. They have expertise in setting up, operating, and scaling a relational database, which can reduce time-consuming database administration tasks. They can also ensure high availability and failover support for DB instances, making your applications more resilient and reliable. Furthermore, they can help you to optimize costs and performance by selecting the right database and configurations. Their skills can be instrumental in ensuring your data is secure, backed-up, and easily recoverable, providing peace of mind for your business.