Servers

Please register here: https://hazelcast.com/resources/resilient-java-in-production-meetup/ ### Modern Java systems don’t fail all at once. They fail under load, during warmup, and sometimes days after a “successful” zero-downtime deployment. Join us for an evening focused on real-world resilience in production Java systems, from JVM performance stability to the hidden risks of mixed-version state during rolling upgrades. Come for the talks, stay for the conversations. Food, drinks, swag, and a LEGO® raffle included. ### **Special Guest: Simon Ritter** Java Champion and Deputy CTO at Azul, Simon Ritter shares how to make JVM performance more resilient by reducing latency risk from GC, warmup, and JIT behaviour without changing application code. ### **Hazelcast Session** Zero-downtime rolling upgrades in distributed Java systems are hard when multiple versions of the same service and data model must run concurrently and share state. Using Hazelcast and Hazelcast Compact Serialization, we’ll show practical Java examples and tests that demonstrate how mixed versions behave and how to make those upgrades resilient in real systems. ### **What’s in Store?** * Two technical talks on resilience in production Java systems * Food & drinks included * Swag + LEGO® raffle * Networking with the local Java community Please register here: https://hazelcast.com/resources/resilient-java-in-production-meetup/

**Advanced booking is required** \- find out more on our website \[[www.silverfit.org.uk/elephantandcastle](www.silverfit.org.uk/elephantandcastle)] **Meet Up is a means for promotion and *not a way to sign up* to this session.** ### **Activity: Yoga - A Gentle, Open-Level Class for All Abilities** **Venue:** Elephant and Castle Community and Engagement Hub, Upper floor, Castle Square, 40 Elephant Road, London, SE17 1EU **Day:** Wednesday **Time:** 10.15am-11am session, please arrive from 10am. **Instructor:** Heather **Description of session:** Boost your flexibility and strength while calming your mind and body in this relaxing yoga session. Suitable for all, each class includes a gentle pranayama (breathing meditation) to deepen your experience. **Price:** This session is free, with an option to donate to Silverfit at the check out. Advanced sign up is essential to regulate numbers. *** For more information about this session please email the Project Manager at - **info@silverfit.org.uk** Learn more about **Silverfit Charity** on our website [www.silverfit.org.uk](http://www.silverfit.org.uk/)

## Details Welcome to the DevSecOps London Gathering March Event on Wednesday 26 March. We bring you two amazing talks, as well as the usual conversations, pizza and beer! 📍 **Hosted at Autogen AI, Pentonville Road, London** 📅 **Wednesday, 26 March** 🕕 **6:00–8:00 PM** ## Talk 1 **Abstract:** Software supply chain attacks are no longer rare or theoretical. They are happening every day. Recent ​ incidents show how easily malicious packages can enter trusted registries and make their way into production systems before anyone notices. Today’s package managers host millions of components and support billions of downloads each week. That scale enables modern software development, but it also creates an enormous attack surface. Typosquatting, dependency confusion, malicious install scripts, and credential harvesting are no longer unusual techniques. They are now common and repeatable attack patterns. This session looks at how these attacks are playing out. Using malicious code detection data from Veracode, we walk-through real-world supply chain attack campaigns, the techniques attackers use, and the indicators that separate legitimate open-source packages from malicious ones. Attendees will see how weaponized components are identified, sometimes before they reach production and sometimes after damage has already begun. The talk also draws on industry research, including findings from the Veracode State of Software Security report, to put hard numbers behind the risk introduced by open-source dependencies and transitive trust. The session concludes with practical guidance for reducing exposure without slowing development. Topics include dependency controls, CI CD enforcement, malicious code detection, and continuous monitoring approaches that fit modern engineering workflows. ## Talk 2 **Abstract** [The National Archives](https://www.nationalarchives.gov.uk/ "https://www.nationalarchives.gov.uk/") is the official archive and publisher for the UK Government. Our records include physical records such as the Domesday Book and Magna Carta, along with digital records from UK Government departments, Enquiries, and other public bodies, held both on premise and in public cloud. It's vitally important to protect our digital records from accidental deletion and the increasing threat of ransomware. We therefore initiated a programme to implement immutable cloud backups using the AWS Backup service within a central, segregated AWS account. In this talk, we'll share our learnings from this programme of work, including: * why AWS Backup compliance mode vault locks are not always truly immutable * which KMS key types should be selected to support backup and restore to a central vault * the importance of Logically Air Gapped (LAG) vaults * how each AWS service has implemented backups differently * which widely used AWS database option doesn't support centralised backup * cost considerations for setting up backup plans We soon learnt that it's not just a case of "Turn on AWS Backup". To deploy a centralised solution, we needed to: * configure centralised AWS Backup vaults and vault policies * deploy components to workload accounts, including Backup vaults, EventBridge, IAM roles * select the appropriate vault type depending on AWS resource type We decided to implement our solution as an open-source, public Terraform Module which deploys immutable AWS Backups across an AWS Organization, to handle this complexity, and simplify onboarding new accounts and resources to be backed up. You'll come away with an increased understanding of AWS Backup, an appreciation of its complexity and limitations, and the opportunity to greatly simplify deployment of truly immutable backups across your AWS accounts, using our public Terraform module.

Please read the full description! **Spanish Conversational Club** **Club de conversación en ESPAÑOL** **How does it work?** The Spanglish club is for all people wanting to improve their Spanish outside of a class room. Depending on numbers, there are going to be groups of max 6 people, the groups will be Beginners (A2), Intermediate and Advance. Each group will have a Spanish native speaker who can help you with your Spanish :) We will first meet our table amig@s and socialise, then we will make a fun and interesting activity for you to have a better Spanish speaking experience. Please book only if you are 100% sure to attend as there will be other Spanglishers waiting for you. **Where? Time?** Royal Festival Hall Riverside Bar Southbank Centre, Belvedere Rd, London SE1 8XX 19:30 to 21:00 **Google Maps:** **[https://maps.app.goo.gl/8ZY6zDymAM7M6Lju5](https://maps.app.goo.gl/8ZY6zDymAM7M6Lju5)** **Note:** We will be at the front of the Riverside Bar. Although, this might change depending on tables’ availability. Please look for Spanglish Flag/t-shirt or simply call us +447870776718. We don’t have a private area, we’ll be at a public space. There will be public noise. You can join the **Whatsapp [https://chat.whatsapp.com/LSUpj7m1tCZ2Vj86dmJR76](https://chat.whatsapp.com/LSUpj7m1tCZ2Vj86dmJR76)** for the latest updates. **How much does it cost?** £10 Your attendance is confirmed once you have booked in this website and paid in our online store. Store: **[https://www.spanglish-lc.com/page/events](https://www.spanglish-lc.com/page/events)** FREE for Native Spanish Speakers. Únete! No pagas por el evento :D **Why should I come?** You should come if you want to be immersed in a Spanish conversation with native speakers for 90 mins and more! You should also come if you want to make new friends and learn about different cultures at the same time. **Can we have a drink during the session?** Of course, it is all about feeling comfortable and we all know that a drink help us with fluency, there is a coffee shop and a bar at the center. **Can I suggest topics or just make an open suggestion?** Of course, just bring your suggestions to the session or send us an email. Your event planner will ensure your suggestion has the right execution. We are here to help and provide you guys with the best environment possible for you to have fun and improve your Spanish speaking. **Note:** This event is not suggested for beginners A1 Zero Spanish learners. Please get in touch if you need some lessons. **Suggestions or Qs** Just drop me a WhatsApp, message or email. Our events are advertised on different platforms. For this event we expect around 20 people. **[Whatsapp](https://wa.me/message/VHD2GRUCYYBDP1),** Calls or MSNs **[+447870776718](https://wa.me/message/VHD2GRUCYYBDP1)** **Instagram** and **Facebook** as **[@spanglishlc](https://www.instagram.com/spanglishlc/)** We have more events and great teachers to enhance your learning, check all our **[events](https://www.spanglish-lc.com/events), [courses](https://www.spanglish-lc.com/learning)**[ ](https://www.spanglish-lc.com/learning)and **[teachers.](https://www.spanglish-lc.com/learning)**

**Agentic AI from Qlik: Smarter Decisions, Delivered in Real Time** Every organisation makes hundreds of decisions each day. The problem is not a lack of data, it is the inability to access the full picture at the right time. Data sits in silos, insights arrive too late, and teams spend more time searching for answers than acting on them. At our upcoming **Qlik Meetup,** we will explore how Agentic AI from **Qlik** is transforming this reality. Built on the power of **Qlik Answers**, Qlik’s **Agentic AI** framework introduces intelligent AI agents that go beyond dashboards and static reporting. These agents understand context, connect structured and unstructured data, explain the “why” behind insights, and take meaningful action. The result is faster, more confident decision making across the organisation. Join us for an interactive session including live discussion and Q&A with members of the Qlik team, where we will demonstrate how Agentic AI: * Unifies all your data sources, enabling instant access to structured and unstructured information wherever it resides * Delivers transparent, explainable analytics with clear traceability back to source data * Automates intelligently by building dashboards, triggering workflows and completing routine tasks * Amplifies team productivity by acting as an intelligent extension of your workforce * Accelerates time to value through a plug and play architecture designed for rapid deployment and measurable ROI This session is ideal for data leaders, BI professionals and analytics teams looking to move from insight generation to intelligent execution. If you are serious about unlocking the next evolution of analytics within your organisation, this is a session not to miss.

Make sure to **Pre-book** your ticket through [our website](www.ontherocksbarcrawl.com/london/book-now) We're rated number 1 for nightlife on TripAdvisor in Brighton and Barcelona, and 12th in London so you know you'll have a great time ◡̈ People come from LOTS of other channels so please ignore the meetup RSVP number ◡̈ Whether you're new to London or just expanding your social circle, bar crawling is a fantastic way to meet people! Every day our crawl is full of lively people who are just there to meet new friends and have a good time. Guides will take you to at least 5 great bars and clubs in the centre of London. The guides make sure to make everyone feel included, encourage mixing within the group and introduce everyone. This makes it a great activity whether you come alone or with friends. We hope to meet you soon :) INFO: exact meeting point shared once you purchase a ticket (prices vary depending on when you book but start at £19.50) Included is : \- Entry to four bars and a club \- A free shot at each bar \- exclusive reduced drink deals at every venue \- access to the photos that we take with our big fancy camera BRING ID! 18+ years old only (Sorry, it's the law :/ ) Make sure to bring a valid Driving Licence or Passport, other forms of ID (including photocopies of the above) are unlikely to be accepted by the venues that we visit. Make sure to bring ID no matter your age. \*\*\*Please note: Due to previous bad experiences, we are unfortunately no longer able to accept stag/hen dos (or same-sex groups of more than 9) on our main crawl. To book a private crawl with us, please contact london@ontherocksbarcrawl.com\*\*\* Ts&Cs apply: [https://ontherocksbarcrawl.com/brighton/terms-and-conditions/](https://ontherocksbarcrawl.com/brighton/terms-and-conditions/)

**Important:** Register on the [event website](https://bit.ly/4rmQlDf) is required for admission. RSVP on meetup is turned off. This full-day session is designed for developers who want practical experience building AI applications with retrieval-augmented generation (RAG) and agent memory. During the workshop, you’ll work through real coding exercises that take you from AI data fundamentals to building production-style RAG pipelines and implementing persistent memory for AI agents. Bring your laptop and be ready to build. ### What You Will Learn * AI data fundamentals for application development * Vector search and similarity metrics * Building RAG pipelines with LangChain and Python * Implementing agent memory and context management * Designing production-ready AI workflows ### Workshop Topics **Data Fundamentals for AI Applications** Learn the database and data modeling concepts behind modern AI applications, including vector data, similarity search, and data structures used in AI systems. **Building RAG and Agentic Applications** Build a production-style RAG pipeline using LangChain and Python, covering data ingestion, vector search, retrieval, and response generation. **Agent Memory and Context Engineering** Implement persistent agent memory using Oracle AI Database, including episodic, semantic, and procedural memory, cross-session recall, and context management. **Important:** Register on the [event website](https://bit.ly/4rmQlDf) is required for admission.

**Address: 210-212 Southwark Park Road, London SE16 3RX** **Doors Open 12pm Event starts 12:30pm-5pm** **Player Capacity: 8 players** Welcome to our **Shadowverse TCG** Constructed Tournament. The day consists of 3 to 5 rounds of Swiss and prizing is distributed to players with a positive record. To participate in the event, alongside your **ticket purchase on our [website](https://www.thebrotherhoodgames.co.uk/shadowverse-evolve-events)**, you will be asked to register on the Bushinavi app. We use this app for our tournament. We will hand out a promo pack for the tournament. If you are unfamiliar, please ask our member of staff upon arrival to the store where a member of staff will be happy to assist. If you haven't already, please join our Instagram, YouTube and Discord Server for news about upcoming events, announcements, and social interaction with your fellow players! *The Brotherhood Games Discord* https://discord.com/invite/SJaQXyeNXx

Hi Architects, Welcome to our the second AWS London Well-Architected User Group Meetup!!! 🥳🥳🥳 Due to the huge demand we saw for our inaugural meetup we have gone bigger with a new venue. Dragon Hall Trust, 17 Stukeley Street, London WC2B 5LT The AWS London Well-Architected Meetup is the latest chapter in the most popular AWS Meetup group globally. At each meetup we cover off various pillars of AWS best-practice in detail including insights from industry leaders that specialise in the Well-Architected Framework. We'll be announcing more speakers and topics over the coming weeks. **Speakers** * **The Philosophy Behind Well-Architected** **Philip Fitzsimons (Fitz)** \- Ex\-AWS \- Co\-authored the AWS Well\-Architected Framework\. The Well-Architected Framework started at AWS but has since been adopted by every major cloud vendor and beyond. Why did it resonate so widely? In this session, Fitz, who led the Well-Architected initiative at AWS from the beginning, explores the philosophy behind the framework, how it was intended to shape architectural thinking, and the mistakes teams commonly make when applying it. Drawing on lessons from seeing thousands of real architectures, he will explain how to approach Well-Architected reviews in a way that actually improves systems rather than just generating checklists. * **Running your first Well-Architected Review: A Live Walkthrough** **James Harding** \- Technical CSM \- Green Custard Curious about how a Well-Architected Review works in practice? In this session we'll run a live walkthrough using the AWS Well-Architected Tool, showing how to define a workload, answer the review questions, identify High Risk Issues and move on to an actionable improvement plan. * **Building Your Infrastructure: "Self-Hosted vs. Managed"** **Mykola Boiko -** Backend Developer - Ultralytics What does it really cost to build and operate your own infrastructure? Mykola Boiko shares real-world lessons from scaling a globally distributed AI platform using self-hosted infrastructure before gradually migrating services to AWS. Through stories of building replication, caching, observability, and multi-region reliability from scratch, the session reveals the hidden operational complexity and costs behind running everything yourself. The journey highlights key principles of the AWS Well-Architected Framework including Reliability, Performance Efficiency, Operational Excellence, and Cost Optimisation and shows why managed cloud services can dramatically reduce operational burden while improving scalability and resilience. More speakers to be announced soon. So come join us at 7pm for a 7.30pm start, including drinks, snacks and friendly networking after our talks :-) \*\*\*NB: No entry to the building after 7.30pm.\*\*\*

**About the London Software Guild** ​The London Software Guild gathers developers, architects, and teams across London who care deeply about the craft of building great software. No fluff, no vendor pitches — just people who take the work seriously, sharing what they've learned the hard way. *** ## ​**Tonight's Speakers** ## ​**🎤 Kieran — Founding Engineer, Demand-Genius** ​Kieran is a founding engineer at Demand-Genius, working to close the gap between how humans and machines perceive your brand versus reality. Background in electrical & electronic engineering, previously working on real-time payments systems, high-scale distributed dynamic rules engines, and reverse proxies. Third Start-Up/Scale-Up (because I'm dumb and have never learnt my lesson). ​ **Talk: The Statistical (Un)Certainty That Our AI Co-Founder Ruins Everything** ​We have handed the most powerful text prediction machines ever built the keys to our codebases. They write code that is statistically likely to be correct. But "statistically likely" and "correct" are not the same thing. As we move toward autonomous multi-agent systems writing production code at machine speed, that gap becomes the central engineering problem of our time. ​Code is not text. It is a formal, deterministic, mathematical structure that happens to be serialised as text. Every tool in the agentic coding stack — retrieval, editing, version control, coordination — treats it as text. ​This talk argues that the answer isn't better frontier models. It's better systems around models. Specifically, the engineering disciplines we've used for a century to control uncertain systems — feedback loops, formal verification, dependency analysis, and control theory — are the missing layer between "AI can write code" and "AI can write code you can trust." *** ## ​**🎤 Andy Roberts — Senior Engineering Leader** ​Andy Roberts is a senior engineering leader with 25+ years of experience — the kind where you've actually written the code, run the teams, and been in the room when things went wrong at scale. Previously Head of EMEA Enterprise Solutions at Apollo GraphQL, where he helped companies like [Booking.com](https://booking.com/), PayPal, and The New York Times stop arguing about their APIs. Before that, Head of API Engineering at RS Components, wrangling 11 teams. Has strong opinions about federated architecture and isn't afraid to use them. ​ **Talk: Built for Browsers, Billed by Tokens** *Your microservices solved for latency. AI agents are solving for context. Nobody told your APIs.* ​Every era of software development has been defined by a constraint that reshaped architecture. In the database era we optimised for round trips. In the web era we obsessed over latency. Mobile forced us to think about bandwidth and battery. Each shift required new instincts, new patterns, new defaults. We're in the middle of another one. ​The AI era introduces a new constraint: context. Language models have finite working memory, and every API response your services return goes into it. The kitchen-sink response payloads that work fine for browsers are quietly making your AI agents more expensive and less capable — and the cost is almost entirely invisible in your existing dashboards. ​This talk maps the constraint transition from latency to context, shows what it means for the microservice APIs you have today, and offers five concrete things you can do about it without touching a line of existing backend code.

Please join us for our next Bioinformatics London meetup, where we welcome **Francisco Azuaje**, Director of Bioinformatics and AI at **Genomics England**, for a talk on what it really takes to turn powerful models and rich datasets into safe, trustworthy impact in the clinic. **Francisco Azuaje** is Director of Bioinformatics at **Genomics England**, where he leads applied ML and GenAI across national-scale genomic and clinical datasets. With 25+ years across academia, public sector and pharma (including UCB and the Luxembourg Institute of Health), his work focuses on what actually works in AI for bioinformatics: moving from proof-of-concept to robust, governed systems that clinicians and patients can trust. In this talk, he will discuss real-world lessons from deploying AI in genomics pipelines and health data platforms, touching on verification, safety, organisational friction, and why the hard problems now are as much social and operational as they are technical. Approximate schedule: * 18:30 – Doors open * 18:45 – Chitchat, announcements * 19:00 – Talk and Q&A * 19:45 – End, then adjourn to a nearby pub for informal discussion Please **RSVP at least the day before** so we can provide an attendee list to reception. Make sure your Meetup name looks like a real name (e.g. “J Smith” or “Jane Jones”, not “weaselstabber”) so University of Westminster reception can identify you. We look forward to seeing you there for an honest discussion about what it takes to make AI and genomics work *for* real patients, not just in demos.

​Join us for the 25th London PyTorch Meetup! 🔥 ​We have our first speaker confirmed: **Peter Romov** – Open Source Contributor, 2. PyTorch/Opacus Autoresearch for Discovering State-of-the-Art LLM Adversarial Attacks ​More speakers to be announced.

**Important time note:** Please plan on arriving between 5:30 and 6:00 as the elevators lock after 6 and you'll need to message us and we'll need to come get you. The building address is 4450 Bridge Park The entrance is 6620 Mooney St, Suite 400 **Abstract** Web Forms gave .NET developers a powerful abstraction for building reusable UI controls long before design systems were a thing. Web Components finally bring that same idea to the browser natively. This session explores how the Web Forms mindset translates into Custom Elements, Shadow DOM, and HTML templates. We’ll examine how Web Components enable design systems that work across frameworks, how they differ from server‑driven controls, and why they’re becoming a foundational layer for modern UI. Whether you’re maintaining legacy apps or building greenfield projects, you’ll leave with a practical understanding of how to apply familiar patterns in a modern, standards‑based way. **YouTube Link** TBA

Builders, creators, architects, admins, consultants - come one, come all. This one's for you. We're bringing a little friendly competition to the Columbus ServiceNow community while highlighting the cool things people have built on the platform. Five presenters will take the stage to showcase something they've built, solved, designed, or imagined on the ServiceNow platform - and a panel of judges (plus YOU, our amazing audience) will score them live. So basically, America's Got Talent but make it ServiceNow's Got Talent. Bring a notepad if you'd like 'cause you'll definitely be learning something new. Each presenter gets 10 minutes max to wow the crowd with: • A demo • A real-world business solution • A bold idea • A UX transformation • Or a creative use of the platform Judging Criteria: 🏆 Business Value 🚀 Innovation ✨ User Experience This event is about celebrating ideas, sharing knowledge, and showing how ServiceNow can drive both business impact and meaningful user value. Come learn. Come support. Come get inspired. Refreshments and bites will be provided. And maybe next time… you’ll be on stage.

Our monthly PHP meetup. A virtual shindig courtesy of Zoom. Check back here for the details around 6:15 pm

Bienvenue! Columbus French Conversation group invites you to our Saturday morning French conversation club. Expect a casual and welcoming atmosphere in which to learn french! I will bring my laptop so we can look up new vocabulary as needed! The venue is a beautiful French restaurant so you can really get into the zone :)

**Improving Office in Franklinton** Physical location: Improving Office 330 Rush Alley Suite #150 Columbus, OH 43215 Schedule: 6:00 p.m.: Socialize, eat, and drink. Improving will be providing pizza and beverages. 6:30 to 8:00 pm. Main meeting and presentation(s). Topic: Type Annotations with John Cassidy We meet on the last Monday of each Month. Presentations are given by members and friends of this group. If you would like to do a presentation (small or large) on a python topic, please contact Central OH Python at centralohpython@gmail.com

**New Dojo Location!** **Knotty Pine Brewing** 1765 W 3rd Ave, Columbus, OH 43212 We're going to try a new dojo location for a few weeks and see how it works Dojos are informal Python group study sessions where everyone interested in Python gathers to learn about Python, help others with Python, or just hang out. Everyone is welcome from Python beginners to experts. Bringing a laptop is encouraged (we'll have extension cords and power strips). If there's something you want to learn leave a comment on this invite so we can plan ahead. We're looking for topic suggestions and people interested in presenting at our monthly meetings. To this end we've set up a survey form at [https://docs.google.com/forms/d/15eBKF1nQQ2XS5gzD4rvhVRHMBEj7lJtHuA9wXupS3Uc](https://docs.google.com/forms/d/15eBKF1nQQ2XS5gzD4rvhVRHMBEj7lJtHuA9wXupS3Uc)

**First meetup of the Columbus AI Engineering group.** We’ll kick things off with a practical, beginner-friendly discussion on: **How LLMs like ChatGPT actually work — and how to build real applications with them.** We’ll cover: * what’s actually happening under the hood (at a high level) * why LLMs behave the way they do (hallucinations, prompt sensitivity, etc.) * how people are building real systems with them today * where things break in practice This will be a **short, informal talk (\~15–20 min)** followed by open discussion and Q&A. Whether you’re an engineer, builder, or just curious about how modern AI systems work, you’re welcome to join. No slides, no fluff — just real conversation about real systems. We’ll hang out afterward and get to know each other.