The author shows the possibility of using microservice architecture at designing the backend of the National Atlas of Russia (NAR) site, as part of the National Spatial Data System. The relevance of the study is due to the need to reliably reflect spatial information on the Russian Federation in the information field. The experience of foreign countries that periodically published national atlases and partially switched from printed versions to sites and geographic information systems on the Internet is considered. Creating the backend, the server part of the NAR site, was divided into stages, a programming language was chosen and a simplified architectural scheme of the service was proposed with the main components highlighted. Free and open source software is considered as components: ClickHouse, Elasticsearch, Kafka, PostgresSQL, React, Nginx, etc. Implementation of the project to create the backend of the NAR site will enable designing a modern, convenient and relevant service that meets the challenges of the time, both for consumers, and the developers of the Atlas.