A Functional Test Developer is essential to ensure the quality and functionality of software products. They design and execute test cases, identifying any defects or issues that might affect the user experience. Hiring a Functional Test Developer enables early detection of errors, reducing the cost and time associated with fixing them later. They also play a crucial role in validating that the software meets business requirements, ensuring the final product aligns with user needs and expectations. Their expertise contributes to improved product reliability, user satisfaction, and ultimately, business success.