Yes, it's possible for one person to build an eCommerce website, especially if they possess a wide range of skills encompassing web development, UX/UI design, database management, and understanding of eCommerce platforms. However, the complexity and size of the site play a significant role. A small business or a startup might manage with a single developer for a basic eCommerce site. However, larger, more complex websites often require a team of developers, along with UX/UI designers, SEO specialists, and copywriters to create an efficient and engaging eCommerce experience. While a single person can set up the basic structure using an eCommerce platform, for a truly custom, scalable, and robust site, a team approach often works best.