This course focuses on the process of designing and building a web application for geodata dissemination from a spatial problem-solving perspective. At the start of the course, you will be presented with a web application that has been developed in response to a certain geospatial challenge. Throughout the course, you will learn the theoretical concepts and practical skills necessary to be able to recreate this application by yourself. From scratch, step-by-step, you will rebuild the application while learning core notions of spatial data management, analysis, and visualization, basic programming skills, as well as hands-on training for installing and setting-up of a geodatabase, webserver, map-server and used frameworks. The course revolves around a didactic case study on food security in Burundi, East Africa. You will learn how to build a geospatial web application that serves to better understand producers’ accessibility to food markets in that country. At the end of the course, you will reflect on possible ways to adapt the tool to tackle a real local problem in your country. During this course, you will follow the complete cycle to design and build a geo-web application, learning what is necessary to be able to correctly handle each of its subsequent stages. In this way, you will be able in the future to create similar applications on your own that are useful for other purposes.