An Image Optimization Developer is responsible for enhancing the performance of digital images on websites or applications. They primarily focus on reducing the file size of images without compromising their quality, ensuring faster load times and a better user experience. They use various techniques like compression, resizing, and caching. They may also implement responsive images to adapt to different screen sizes. Furthermore, they use tools and languages like JavaScript, CSS, HTML, and image editing software. Their work is crucial for improving website speed, SEO ranking, and overall performance, especially in today's visually-driven online environments.