Contributors are vital for open-source projects and users are essential for a scientific project to have impact in society. Still, scientific projects often suffer from low visibility and trust, while only the core developers contribute. Getting (the right) users is a very fulfilling, yet long trip. Turning them further into motivated contributors is even harder, but can be invaluable for the project's sustainability. From getting the first user to establishing a self-sustained community, it is essential for a project to provide continuous user support, low communication barrier, and active development. However, as the community grows, it also needs to function in a scalable, distributed way. On the technical side, splitting a project into components that can isolate any "damage" and establishing a reliable testing infrastructure can increase the confidence of new contributors. With a detailed code reviewing culture and brave integration into the project, these contributors can further turn to senior maintainers. Having a strong backbone in high-performance computing and multi-physics simulations, preCICE now needs additional expertise to adapt to a growing number of users. This talk will present our findings on developing a project with isolated components, our exploration of different communication channels, and the many benefits and challenges that a diverse community can bring to scientific projects.     «

Contributors are vital for open-source projects and users are essential for a scientific project to have impact in society. Still, scientific projects often suffer from low visibility and trust, while only the core developers contribute. Getting (the right) users is a very fulfilling, yet long trip. Turning them further into motivated contributors is even harder, but can be invaluable for the project's sustainability. From getting the first user to establishing a self-sustained community, it...     »