This thesis is about the design and development of a completely functional e-marketplace website. It merges principal theoretical thinking from the domains of UX design, website structure, and frontend-backend implementation. Which after will be well executed in the practical part of the thesis. Practical implementation includes creating the website from the ground up with HTML, CSS, JavaScript, Node.js, and MongoDB. Product filtration, live search implementation, responsive design, user authentication,fetching information,storing data in database and a fully functional checkout process are among the implemented features. It was aimed to develop a fast, scalable, and user-friendly site that mirrors actual marketplace performance in practice.