Santa Clara Campus Paid conference, no swag is provided. No recording due to unconference. Raise topics and work on each topic. Moderator of each topic is the person who raised it.
Labs Office, “The Circle” Zurich Free, and no swag is provided. State of each project in GraalVM, roadmap, and so on are provided. Participants framework developers/product managers (Spring Boot, Micronaut, Helidon, etc.) Active community contributors
Antwerpen, Antwerp, Belgium Paid conference, some swag is provided. Session archives are available. Might be the largest conference in EU. Topic is not limited to Java.
Université Libre De Bruxelles, Solbosch Campus Free of charge, but you can purchase a hoodie / tee for donation. You can join sessions in JVM track, contents level is like JVM Language Summit.
Waterfront Congress Centre Paid conference, and some swags are provided. Session archives are available. Deadline of speaker proposal for 2024 is September 30, 2023. https://www.jfokus.se/iamahero
but… You can improve your English (or/and French), maybe... Most of EU residents are not native English speakers, so you might feel comfortable rather EU than US. You can refreshen yourself with getting away from the daily work. And...