This work focuses on the development of a web application designed for a rent-a-boat service, which is a market segment experiencing growing demand in Croatia. In the modern digital world, web applications have become an integral part of business, especially in the tourism sector where online presence is crucial for success. The goal of the project is to develop a web application that stands out in the market with its functionality and a focus on user experience, thereby being competitive with existing solutions. The development of the application involves the use of modern technologies and approaches. For the frontend part of the application, the technology React.js has been chosen, one of the most popular JavaScript tools for creating user interfaces. React.js stands out for its flexibility, especially when used in combination with Redux, which allows efficient state management of the application. This approach enables fast and dynamic interaction with users and provides an exceptional user experience. The backend of the application is built using Node.js, an event-driven platform that allows the construction of scalable and efficient web applications. In combination with Express.js, a minimalist and flexible web application framework, a robust structure is created that supports the requirements and functionalities necessary for a rent-a-boat service. MongoDB, chosen as the database, offers high performance, easy scalability, and flexibility, making it ideal for managing complex data for such types of applications. Throughout the work, all the technologies and development methodologies used are explained in detail, with a special emphasis on the integration of frontend and backend components.