A Custom eCommerce Platform Developer designs, builds, and maintains bespoke online shopping systems tailored to a business's specific needs. They integrate unique features like product catalogues, shopping carts, payment gateways, and customer relationship management tools. They ensure the platform is user-friendly, secure, and provides a seamless shopping experience. They also optimize the platform for search engines, improve its performance, and troubleshoot any technical issues. Their work involves coding, testing, and deploying the platform, as well as continuously updating and enhancing it to meet changing business requirements and technological advancements.