Hiring a LESS developer can significantly streamline your web development process. LESS, a dynamic preprocessor style sheet language, can enhance the functionality of your CSS. A LESS developer can introduce variables, mixins, functions and many more features into your CSS, making it more efficient and maintainable. They can help reduce the redundancy in your code, saving time and effort in the long run. Their skills can also lead to a more visually appealing and responsive website, improving user experience and potentially increasing your website's traffic and engagement.