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
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
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Continue the conversation at our Slack Group
If you're not a member, sign up here2 attendees
LJC Meetup at Capital One
Capital One, 1 Old Street Yard,, London, GBPlease register on Eventbrite to join this event.
LJC Meet-ups is a series of events, aimed at giving all Community members an opportunity to present at an LJC event.
Join us on 25th June 2026 for a London Java Community meetup hosted at Capital One.
Speakers:
Melinda Seckington - Leadership & Speaker Coach
Topic: See It, Say It, Sort It: How To Be More ProactiveIt's really easy to fall into a reactive rhythm as an engineer. A ticket comes in. You pick it up. Someone else makes a decision. You adjust. Before you know it, you've spent weeks doing good work… but not necessarily shaping what that work is. The engineers who have the biggest impact aren't the ones who simply deliver. They're the ones who pay attention, spot opportunities early, and take action without waiting to be asked. Proactiveness is a skill, a mindset, and a practice. And it can be learned.
In this talk, we'll look at a framework for proactiveness: Awareness + Intent + Action. We'll explore how you can increase your awareness of what's happening around you, clarify the impact you want to have, and recognise the blockers that stop you from taking the next step.
Speaker bio: Melinda is a trainer and coach, working with engineering teams and leaders to improve their communication, management and collaboration skills. She previously was an engineering manager at companies such as the Wikimedia Foundation and FutureLearn, where she focused on creating great internal engineering cultures. She’s an international conference speaker and has spoken at over 50 conferences, covering topics from good management practices to becoming a better speaker.
Stephen Galbraith - Staff Engineer at Capital One
Topic: From Fleeticide To Recovery: When Your Auto-Scaling Policy Becomes Your Worst EnemyHorizontal scaling sounds simple in a README, but the reality of a Spring Boot fleet on ECS can quickly turn into "Fleeticide.” We've all seen it: connection pools saturate, health checks flap, and suddenly your auto-scaling policy becomes an auto-failing policy.
In this session, we go behind the scenes of a real-world challenge caused by lack of scaling. We'll dissect our initial assumptions and dive into the technical shifts that dramatically reduced downtime.
We will move beyond "CPU/Memory 101" to look at:
The Observability Gap: Tracking the "hidden" metrics (Thread pools, DB connections) that reveals how much headroom a service has.AWS Patterns for the Real World: Moving beyond basic CloudWatch alarms to custom metrics and predictive scaling that respects Spring Boot's startup overhead.
Architecting for Elasticity: How to bake scaling-awareness into the developer workflow to prevent connection storms and cascading failures.
Huge thanks to our friends at Capital One for sponsoring this event and supporting our Community.
1 attendee
Past events
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