Hiring a Function as a Service (FaaS) developer allows you to leverage serverless architectures, leading to cost efficiency as you pay only for the computing power used. They can help rapidly scale applications in response to demand, improving user experience. FaaS developers can also facilitate faster product updates, as developers can focus on individual functions without managing infrastructure. Their expertise enables seamless integration with other services, enhancing functionality. Ultimately, a FaaS developer can help drive business agility, cost-effectiveness, and improved operational efficiency.