What we’re about
The London Java Community (LJC) is a group of Java Enthusiasts who are interested in benefiting from shared knowledge in the industry. Through our forum and regular meetings you can keep in touch with the latest industry developments, learn new Java (& other JVM) technologies, meet other developers, discuss technical/non technical issues and network further throughout the Java Community.
FAQ
What is the LJC?
What goes on in the LJC?
Who can join?
Is there a fee to Join, is there a fee for the events?
How do I join?
Do you have to go to every presentation?
Where are the events held?
Can I read some member feedback?
Can I give a presentation to the LJC?
What is the LJC?
The LJC is an official Java User Group for developers based in London. It was founded in November 2007 and since then has grown to over 5000 members and is now the biggest Java User Group in the UK.
What goes on in the LJC?
We run a variety of regular events ranging from social events and technical presentations to our full day unconference. On top of the events we run prize draws and have an active mailing list/forum. We support the Graduate Development Community in London and promote London based Open Source Software projects where possible.
Who can join?
Membership is restricted to Java developers working in or around London (or those hoping to train in Java, or relocate to London). Membership will not be granted to those involved in the recruitment industry.
Is there a fee to Join, is there a fee for the events?
It’s completely free to join and 99% of our events are completely free. The only event which is charged for is the Unconference, the charge is minimal and it is there to cover refreshments on the day.
How do I join?
Just click on the link on this page to sign up to the mailing list, you'll hear of all of our latest news and events and can take part in the monthly prize draws.
Do you have to go to every presentation?
Absolutely not – it’s completely up to you which events you attend and which you don’t. Every event attracts a different crowd.
Where are the events held?
Europe's Premier technical training company, Skills Matter (Barbican) sponsor most of our events by providing the venue.
Can I read some member feedback?
We have been collecting feedback for the last few years from our members you can read it here: https://www.meetup.com/Londonjavacommunity/about/comments/?op=all
Can I give a presentation to the LJC?
We run various in-person and online events, and welcome highly experienced speakers, all the way through to those just starting out. If you have a presentation you'd like to submit for consideration, please visit https://sessionize.com/ljc
For further information see our blog here: https://londonjavacommunity.wordpress.com/s... Do not hesitate to get in touch with any questions.
Barry Cranford
Founder of London Java Community
Upcoming events
3
LJC Meet-up at Discover
Discover, 201 Talgarth Road, Hammersmith, W6 8BJ, London, GBPlease register on Eventbrite to join this event.
About this event
Join us for a special London Java Community meetup in partnership with Discover, where we’ll explore how AI is transforming developer productivity — from building smarter workflows to exposing new security risks in code.
This evening features three thought-provoking talks packed with demos, practical insights, and real-world examples.
Talk 1 — Holly Cummins, Senior Principal Software Engineer, IBM
How Quarkus Makes Your Apps Cheaper, Greener, and HappierQuarkus boosts both developer and runtime efficiency — but how? Holly dives into the tech that makes Quarkus so fast and lightweight, covering reactive programming, native binaries, and testing. Expect live demos (including one faster than a light bulb!).
Talk 2 — Ashu Swami, Application Engineer, Discover
Inside GitHub Copilot: The IDE Secrets You Need to KnowGo behind the scenes of GitHub Copilot with short, interactive demos. Learn how to craft better prompts, understand Copilot’s context awareness, and turn it into your most effective coding partner.
Talk 3 — Steve Poole, Director of Communities, London Java Community
The Enemy Within: How AI is Weaponizing Your CodeAI-generated code can supercharge productivity — but it can also introduce hidden vulnerabilities. Steve exposes how attackers exploit AI tools, compromise open-source projects, and what you can do to defend your software supply chain.
Speakers
Holly Cummins – hollycummins.com
Ashu Swami – LinkedIn
Steve Poole – LinkedInCome for the talks, stay for the community — and discover how to make AI your most powerful (and safest) coding ally.
Please register on Eventbrite to join this event.
1 attendee
LJC Meetup at Neo4j - Smarter Context, Safer Code: Graphs and AI in Action
Civo Tech Junction, First Floor, 32-37 Cowper St, London EC2A 4AW, London, GBPlease register on Eventbrite to join this event.
About this event
LJC Meet-ups is a new series of events, aimed at giving all Community members an opportunity to present at an LJC event.
We're excited to invite you to our next Meetup, co-hosted with neo4j!
Join fellow graph enthusiasts, Neo4j developers, and members of the Java community as we explore how graphs, knowledge graphs, and context engineering can unlock smarter applications and better answers.We’ll also uncover how AI-generated code can be weaponized, exposing hidden vulnerabilities in the software we trust.
Whether you’re curious about building with graph-powered AI or safeguarding your projects from new threats, this meetup will give you insights you can put into practice.Session 1: AI in Your IDE: Supercharging Java Coding with GitHub Copilot by Ashu Swami
Learn how GitHub Copilot is transforming the Java development workflow inside IntelliJ IDEA. This session highlights Copilot+ibk's hidden gems, from crafting custom instructions and generating intelligent commit messages to performing AI-powered code reviews.
Through live demos, learn how to integrate these features into your daily development to boost productivity, improve code quality, and code with greater ease and confidence. See how AI can truly become your coding partner in the IDE.
BIO:
Ashu Swami is an Oracle Certified Java Professional and holds multiple AWS certifications with over 18 years of experience in software development. She currently works as a Principal Application Engineer at Discover Financial Services, UK, specialising in Java, Spring Boot, RESTful Microservices, and AWS cloud solutions. Ashu has a strong background in the finance and insurance domains, delivering scalable and secure and high-performance enterprise applications. Ashu is a big AI tools enthusiast, passionate about leveraging AI and Cloud technologies to enhance Software delivery and quality.Session 2: WhatsThat? Using graphs and AI to make sense of your friends WhatsApp group by Martin O'Hanlon
Communication, messaging, and memory are complicated. How are you supposed to keep up with it all? It's difficult for you to keep up with the constant stream of messages you get. How can we expect an LLM to do the same? Let's look at how we can use graphs and AI to summarise the complex streams of messages you get in that oddly titled WhatsApp group.
We look forward to connecting with the community to exchange ideas on graphs, tech, and AI - join the discussion!
Please register on Eventbrite to join this event.
1 attendee
Ignite the Holidays: LJC & vJUG Year-End Celebration
Tessl AI Limited, 210 Pentonville Rd London N1 9JY United Kingdom, London, GBPlease register on Eventbrite to join this event.
About this event
Join the London Java Community and Virtual JUG for a festive evening of fast, fun, and fiery Ignite talks — hosted at Tessl’s London HQ.
Ten brave speakers will each take on the challenge of delivering a lightning talk in just five minutes and twenty auto-advancing slides. Expect a whirlwind of ideas, insights, and laughter as we wrap up another amazing year of Java community activity.
There will be prizes, food, and plenty of time to mingle — plus a vJUG livestream for those joining from afar. Our LJC Sponsors will also be there supporting the event and bringing a few extra surprises.
And yes, there are prizes for the most festive outfit and the most Java-themed outfit, so dress to impress!
Spaces are limited, so grab your ticket early and come celebrate the season with your fellow Java developers.
Want to speak? Submit your Ignite talk here: https://sessionize.com/london-java-community-2025-party/
Please register on Eventbrite to join this event.
1 attendee
Past events
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