Tech Events March–April 2026: Developer Conferences You Should Not Miss

March and April 2026 are packed with major tech events across the US, Europe, and Asia. Whether you are planning to attend or just want to follow the news, here is a concise roundup with dates and why each matters for developers and founders.

## March 2026

**MWC Barcelona — March 2–5**
Fira Gran Via, Barcelona, Spain. The world's largest mobile show: new phones, mobile AI, 5G, and carrier/OEM keynotes. Developers: watch for Android AI, device APIs, and foldable/on-device AI messaging. Stream keynotes or follow tech press.

**NVIDIA GTC — March 16–19**
San Jose, California. The premier AI infrastructure conference. Jensen Huang's keynote (usually March 16) sets the tone for GPUs, data centres, robotics, and inference. Critical if you run models at scale or care about cloud AI capacity. Keynote is free online.

**QCon London — March 16–19**
QEII Centre, London. Software architecture, AI engineering, distributed systems, and leadership. 75+ senior practitioners. Paid; high quality for architects and tech leads.

**JavaOne — March 17–19**
Redwood City, California. Oracle's Java conference returns: keynotes on AI at Java scale, community, architecture; 80+ sessions and labs. For Java/Kotlin and JVM ecosystem developers.

**IntelliJ IDEA Conf — March 26–27**
Virtual, free. JetBrains' conference: Java, Kotlin, JDK 25, AI in Java, JVM internals, performance. Runs 09:00–15:00 UTC. Easy to attend from anywhere.

## April 2026

**Microsoft JDConf — April 8–9**
Global virtual. Microsoft's Java Developer Conference with regional livestreams (Americas, APAC, EMEA). Topics: AI-native Java, app modernisation, cloud-native, LLMs, agent-oriented architectures. Free and global.

**Google Cloud Next — April 22–24**
Mandalay Bay Convention Center, Las Vegas. Google's flagship cloud and AI event: GCP, Vertex AI, Gemini, Workspace, and enterprise adoption. Keynotes and sessions streamed. Essential if you build on GCP or use Google AI APIs.

**Black Hat Asia — April 21–24**
Marina Bay Sands, Singapore. Security research, AI threats, supply chain vulnerabilities, and defence. For security engineers and anyone building systems that need to stay secure.

**Spring I/O — April 13–15**
Barcelona. The Spring developer conference: Spring Boot, Cloud, and JVM ecosystem. Strong European presence; relevant for Java/Spring teams.

## May (Preview)

**Google I/O — May 19–20**
Shoreline Amphitheatre, Mountain View (and online). Android, Gemini, Chrome, and Google AI. Typically heavy on developer APIs and consumer AI. Save the date if you target Android or Google ecosystems.

## How to Use This List

Attend in person if you are in a role that benefits from networking or hands-on labs (e.g. GTC, Google Cloud Next, QCon). Follow online for keynotes and session replays: GTC, MWC, Google Cloud Next, and Google I/O all stream key content. Pick by domain: AI/infra to GTC and Google Cloud Next; mobile to MWC; Java/JVM to JavaOne, JDConf, IntelliJ Conf, Spring I/O; security to Black Hat Asia; architecture to QCon London. Staying aware of what gets announced at these events will keep you ahead of product roadmaps and the tools your peers are adopting in 2026.