Nowadays in given economic situation it is crucial, if not almost necessary for companies to have good relationship with their customers. Those companies that are aware of this fact, are introducing new business strategy, which focuses on good customer relationships, using applications for customer relationship management (CRM). The majority of existing CRM systems are too general for practical use and good efficiency in more specific fields, such as real estate. These lead us into developing web application, which will better support the real estate field. We developed the application in Django REST Framework combined with PostgreSQL database on the server side and AngularJS framework for client side of the application. First part of diploma thesis is dedicated to introduction of the CRM business strategy, and to introduction of technologies and tools, which were used during the development. Second part of the work describes practical development of the web application. In this part application arhitecture, database model, implementation and functionality of each part of the application are described. In the last part the conclusions and ideas for future work are described.