Java and the JVM at tech events
11 write-ups · 11 events · 2025–2026
I collect sessions on Java and the JVM here, mostly from the Amsterdam Java User Group and its hosts. The recurring themes are Project Valhalla, OpenJDK community work, how Java teams adopt AI tooling, and the practical security and developer experience topics that come up in company-hosted evenings.
2026
June 2026 · Red Hat Tech Day Netherlands 2026 · Bunnik
Red Hat Tech Day Netherlands 2026: Harness EngineeringInside Red Hat Tech Day Netherlands 2026: 30 speakers and 34 sessions on AgentOps, agentic AI, Quarkus, LangChain4j, and hybrid cloud inference.
27 May 2026 · Amsterdam Java User Group meetup at Doctolib · Amsterdam
I Lost a Day to @Retryable — Amsterdam JUG at DoctolibKath Alfaro Ramirez shares how a silent Spring AOP proxy bug cost a day of debugging at Doctolib, and why @Retryable is the dangerous outlier.
30 Apr 2026 · Amsterdam Java User Group evening (Project Valhalla) · Amsterdam
Amsterdam JUG: Project Valhalla and Java's Pain PointsAmsterdam JUG, 30 April 2026: a talk on Project Valhalla's JEPs, Java's checked-exception pain in streams, and a career talk on reputation.
19 Mar 2026 · Amsterdam Java User Group meetup at IKEA · Amsterdam
Amsterdam JUG at IKEA: Virtual Threads, ECC and TestingAmsterdam JUG at IKEA, March 2026: Java virtual threads, elliptic curve signatures and JWS, and a system test suite for deploying on a Friday.
28 Jan 2026 · Build Meetup Amsterdam (Uber x EngFlow) · Amsterdam
Build Meetup Amsterdam 2026: Bazel, Buildbarn, BonanzaMy recap of the Uber x EngFlow Build Meetup in Amsterdam: Python versions in a Bazel monorepo, Bonanza from the Buildbarn creator, Maven and designers.
2025
11 Nov 2025 · Friends of OpenJDK at Uber (Amsterdam Java User Group) · Amsterdam
Friends of OpenJDK at Uber: Upgrades and Supply ChainNotes from the Friends of OpenJDK meetup at Uber Amsterdam, 11 November 2025: JVM monorepo upgrades with OpenRewrite and a live supply chain attack demo.
4 Nov 2025 · Amsterdam JUG at ABN AMRO (evening) and Arch9 by Levi9 (day) · Amsterdam
Amsterdam JUG at ABN AMRO: JMH and MicrobenchmarksPet projects, ABN AMRO's open source secret scanner RESC, and François Martin proving which HTML unescape library is fastest with JMH. Plus Arch9 by day.
19 Sept 2025 · AI4Devs Amsterdam 2025 · Amsterdam
AI4Devs 2025 Amsterdam: Spring AI, Iceberg and StrandsAI4Devs Amsterdam, September 2025: Josh Long built a RAG assistant with Spring AI, Pratik Patel queried Iceberg with LLMs, then Koog and Strands Agents.
10 Sept 2025 · Amsterdam AI and Dev Meetups, Autumn 2025 (roundup) · Amsterdam
Amsterdam AI and Dev Meetups, Autumn 2025: A RoundupTwelve smaller Amsterdam tech events from autumn 2025: LangChain, ClimateHack, AI House coding sessions, Apidays, SREday, OpenJDK and sustainable UX.
8 Jul 2025 · Netherlands dbt Meetup (8 July 2025) and Amsterdam JUG (22 July 2025) · Amsterdam
Amsterdam Meetups, Summer 2025: Java JUG and dbtTalk notes from two July 2025 Amsterdam evenings: dbt Projects on Snowflake and dbt Fusion, then Java warm-up with Leyden and CRaC, and the Miro monolith.
1 Jul 2025 · Kubernetes for Developers: Security! (CodeLab workshop) · Amsterdam
Kubernetes Security Codelab at ING Amsterdam, July 2025Hands-on Kubernetes security workshop for Java developers at ING Amsterdam: a hacked container, security context, read-only filesystems, secrets.