I heard about DevConf.cz by Tereza Novotna during Open Source Design Summit in Tirana
DevConf.CZ 2019 is the 11th annual, free, Red Hat sponsored community conference for developers, admins, DevOps engineers, testers, documentation writers and other contributors to open source technologies such as Linux, Middleware, Virtualization, Storage, Cloud and mobile where FLOSS communities sync, share, and hack on upstream projects together in the beautiful city of Brno, Czech Republic.
For the first time in the history of DevConf, the upcoming 11th free open source conference DevConf.CZ 2019 invites young speakers under age of 19 to:
give them an opportunity to share their ideas, projects and show their talent in open source
demonstrate that FOSS technologies are there for everyone in every age
promote FOSS technologies usable anywhere from kindergartens to universities
CfP is still open, and closes tomorrow at lunch time (approximately)
I have already send my proposals