About us
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
2
LJC Meet-up at Redis
Redis Office, Floor 5, Redis office, Bridge House, 4 Borough High St, London SE1 9QQ, London, GBPlease register on Eventbrite join this event.
About this event
The LJC is delighted to be partnering with our sponsor Redis for an exciting meetup!
This will be a wonderful opportunity to learn, network and enjoy great food together.
Huge thanks to our friends at Redis for sponsoring this event and supporting our Community.
Agenda:
5:30pm: Doors open
6pm: LJC and Redis intros
6:10pm: Samuel Agbede: Designing Production-Ready Multi-Agent Systems with Spring AI
7pm: Break & food
7:30pm: Leif Åstrand: UI with Redis and Vaadin using 100% Java
8:15pm: Networking
9pm: Event finishSpeaker One: Samuel Agbede,
Title: Designing Production-Ready Multi-Agent Systems with Spring AI
Synopsis:
Exploring how Redis can go beyond traditional caching to support semantic caching, intelligent routing, and short-lived application memory in AI-driven Java systems.Speaker Bio:
Software Engineer and Developer Advocate at Redis focused on AI agents and memory systems. Samuel explores how context, retrieval and state shape intelligent behaviour in real-world applications.Speaker Two: Leif Åstrand
Title: UI with Redis and Vaadin using 100% Java
Synopsis: Full-stack development can be intimidating, especially when going beyond the typical CRUD. A reactive application with real-time updates requires knowing things like WebSockets on top of the regular frontend stuff. But what if you could build a full-featured full-stack web app using only straightforward Java? No JavaScript, no HTML, no CSS. Just Java.
Join this live coding session to discover how to develop a reactive web app using Spring Boot, Redis and Vaadin. Starting from scratch, we'll cover everything: real-time updates, external services, and a good-looking UI. All in Java.
Speaker Bio:
Leif has been working with full-stack web application development in various ways for the past 20 years. Building applications, building frameworks for building applications, and in the last few years mainly working to understand what it takes to build applications. Works at Vaadin in areas related to product management, research, architecture and product development.This event is organised by RecWorks on behalf of the London Java Community.
The London Java Community is sponsored by Hazelcast, Neo4j, Redis, and Discover
You can see our latest jobs here
You can see our privacy policy here
Continue the conversation at our Slack Group: https://londonjavacommunity.slack.com
Sign up here if you're not a member: https://bcrw.typeform.com/to/IIyQxd15 attendees
London Java Community Unconference 2026
IBM Innovation Studio Floor 5, 20 York Road London SE1 7ND United Kingdom, London, GBPlease register on Eventbrite to join this event:
About the event:
The LJC is delighted to announce our 20th Unconference!
Join us for a full day of discussions, knowledge sharing, learning, and networking with other developers in the industry.There will be an opening keynote session followed by breakout discussion groups on the topics which are important to you. Catering is of course included, with a steady stream of coffee as well as breakfast on arrival, lunch and even afternoon tea.
Our keynote speakers and topics will shortly be announced.
What is an Unconference?
An unconference is a loosely structured, participant-driven meeting. You decide what you want to talk and hear about and which topics you want to discuss. It starts with an empty schedule - no topics are mandated and no separations are made between speakers and the audience. All participants work out a schedule by suggesting, planning, holding, and evaluating sessions, collaboratively. Above all else, it's great fun, whether you want to learn or share it's a supportive and safe space to do it in.This is an in-person event, kindly hosted by IBM.
Thank you to our sponsors Redis, Capital One, and Recworks.
Book your place now at one of the biggest LJC Events of the year!What other events would you like to see at the LJC?
Tell us here: https://forms.office.com/r/ycv74wXBxRThis event is organised by RecWorks on behalf of the London Java Community
You can see our latest jobs here
You can see our privacy policy here
Continue the conversation at our Slack Group
If you're not a member, sign up here2 attendees
Past events
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