Open Source call for papers

3 open CFPs for Open Source developer conferences — deadlines, locations and where to submit your talk.

• bitcoin++ payments edition

  CFP deadline: Aug 17, 2026 (closing soon) Berlin, Germany
  opensource

• Open Source Observability Day

  CFP deadline: Aug 31, 2026 Online
  opensource

• bitcoin++ privacy edition

  CFP deadline: Sep 22, 2026 Seoul, South Korea
  opensource