Hiring a CometD developer can enhance the real-time interactive capabilities of your web application. CometD is a scalable HTTP-based event routing bus that uses AJAX push technology, enabling servers to send data to clients without explicit polling. This allows for faster and more efficient data transmission, reducing latency and improving user experience.

One of the key advantages of hiring a CometD developer is their specialized knowledge in creating highly responsive applications. They can help design systems that facilitate real-time interactions, such as chat applications, live updates, and collaborative tools. This can significantly enhance user engagement and satisfaction.

Moreover, CometD developers can help optimize your web application's performance. CometD's event-driven architecture minimizes server load, allowing your application to handle higher traffic volumes without compromising speed or stability.

They also bring expertise in using CometD's advanced features, like its support for WebSocket, a protocol providing full-duplex communication channels. This expertise is vital in building applications that require high-speed, bi-directional communication between the server and the client.

Lastly, with their deep understanding of CometD, these developers can ensure the application's scalability and resilience, essential for growing businesses. They can help design applications that can effortlessly scale up to meet increasing demand, ensuring your application remains reliable and high-performing.