The rapid growth of e-commerce and online grocery shopping platforms has transformed the retail industry by providing customers with convenient access to daily essentials through digital platforms. Traditional grocery management systems often face challenges related to inventory tracking, order management, product discovery, and customer engagement. This paper presents the Smart EkoMart Grocery Management System developed using the MERN (MongoDB, Express.js, ReactJS, and Node.js) stack. The proposed system integrates secure JWT-based authentication, product management, customer reviews, search and filtering mechanisms, shopping cart functionality, and order processing features within a unified platform. The system aims to improve customer experience, streamline inventory management, and provide scalable e-commerce operations. Experimental analysis demonstrates that the proposed architecture offers improved usability, efficient product management, and secure transaction handling suitable for modern online grocery businesses.