The OpenMS developers meeting brings together people working in computational mass spectrometry to shape the future development of OpenMS. It is targeted to core developers, new developers, and potential future contributors. Short talks, developer tutorials, and code sprints will be intertwined. Participants will have the opportunity to design custom tools and workflows together with instructors. New developers will receive help getting started in OpenMS development. Progress will be tracked on our GitHub page with a resume of each day. For more details ping Tjeerd Dijkstra or Timo Sachsenberg on Gitter.