Hiring a Middleware - ESB (Enterprise Service Bus) developer comes with several advantages. First, these professionals have expert knowledge in integrating different applications, services, and systems in an organization, which is essential for seamless business operations. They ensure that all your software components communicate effectively, promoting interoperability and information consistency across your business.

Second, ESB developers bring in skills that help in simplifying complex integration scenarios. They can create a flexible integration framework that can easily adapt to changing business needs, making your organization more agile and responsive.

Third, they add value to your business by managing real-time message routing, data transformation, and system scalability. This leads to improved business process execution, data accuracy, and operational efficiency.

Fourth, they help in reducing point-to-point connections, minimizing the complexity and cost of integration projects. This also results in fewer errors and less maintenance work.

Lastly, ESB developers can help in implementing a robust security framework. They ensure that all data exchanges happening via the ESB are secure, protecting your business from potential data breaches or leaks.

In sum, an ESB developer can significantly enhance your business's productivity, agility, and security while reducing costs and complexities.