This thesis describes the development and implementation of a web application designed to connect clients and service providers, based on a modern three-tier architecture. The application is aimed at individuals seeking jobs and businesses or individuals looking for workers for temporary projects based on a Contract for Services. The application utilizes Vue.js and Quasar for the development of the presentation layer, providing an intuitive user interface, Node.js and Express.js for managing business logic in the application layer, and PostgreSQL and Sequelize ORM for efficient data management in the data layer. This thesis provides a detailed explanation and implementation of the key functionalities of the web application, including user registration and login, job posting and searching, contract generation, and payment management through Stripe. Additionally, the thesis thoroughly examines the structural and functional features of the system. Mentioned functionalities were developed to provide comprehensive support to users in managing business processes within the platform, enabling them to perform business activities in a digital environment with ease. It is important to note that the application addresses the problem of connecting clients and service providers in the context of digital business, where users increasingly prefer technological solutions over traditional methods of face-to-face communication. This facilitates interaction between users, aligning with the modern needs of the market.