At DHIS2 we're a team of fully remote developers working on the world's largest open-source health information management system, used by 73+ countries for collecting and analyzing health data. You can check our repos here but basically, at the risk of oversimplifying things, we maintain a fully APIfied Java back-end core project and a series of core web apps built on top of a React based front-end technology that we call the App Platform supported by a design system with custom UI components (we have advanced Analytics and an Android SDK too but