Hiring an Apache Zookeeper developer brings numerous advantages to your organization. First, these professionals are skilled in managing distributed systems, ensuring smooth and efficient operation across multiple servers. This improves the reliability and resilience of your system, reducing downtime and potential business losses.

Second, they have expertise in synchronization. They can reduce the complexity of synchronization processes, ensuring your distributed services consistently perform at optimal levels. They can also maintain configuration information and provide distributed synchronization, thus enhancing your system's robustness.

Third, developers proficient in Apache Zookeeper can provide a fail-safe system. They can set up automatic fail-over, ensuring your system is always up and running, minimizing the impact of any failure.

Fourth, they have an understanding of distributed applications and can efficiently coordinate and manage them, reducing the risk of data inconsistencies and improving overall system performance.

Lastly, their knowledge of Apache Zookeeper enables them to manage large sets of data across numerous nodes, ensuring your system can effectively handle high data volumes.

In essence, hiring an Apache Zookeeper developer can significantly improve the reliability, efficiency, and robustness of your distributed systems, enhancing your business operations and overall performance.