The article discusses a new way of designing web software called Domain Driven Design, which focuses on understanding the business needs of companies and creating clear, reusable architecture. This approach helps in integrating large-scale systems more effectively. The researchers applied this design concept to develop a Web Platform for a large energy enterprise, using a layered architecture and .Net Entity Framework. The result was a successful architecture design and application implementation method for the platform, providing a useful model for developing large-scale integrated platforms.