Hiring an Apache Samza developer is crucial for managing and processing high volumes of data in real-time. They provide expertise in handling large-scale systems and complex data pipelines, ensuring efficient, reliable, and fault-tolerant data processing. Their knowledge of stream processing, distributed computing, and event-driven programming can facilitate real-time analytics, monitoring, and decision-making processes in your business. This can lead to improved operational efficiency, customer experience, and ultimately, business growth. Their skills can also be instrumental in identifying and resolving potential system bottlenecks and performance issues.