Hadoop

​Join **Orchestra**, **Tracer** and **Lightdash** for an in-person evening with London’s data engineering community. ​This event is built for **data engineers, analytics engineers, and platform teams** who enjoy going deep on real technical topics — from modern data stack architecture to reliability, observability, orchestration, and the practical lessons learned from running pipelines in production. ​Expect a relaxed atmosphere, good people, and plenty of time for conversation (with free 🍕 & 🍻). IMPORTANT: MEETUP IS TRYING TO BLEED US ALL DRY SO PLEASE [SIGNUP ON LUMA](https://luma.com/ml500u2m) AND SUBSCRIBE TO THE CALENDAR THERE. IF YOU DONT SIGN UP WE CANT GUARANTEE YOUR SPOT! [https://luma.com/ml500u2m](https://luma.com/ml500u2m) ​**Agenda** ​**6:00 – 6:30pm:** Arrivals, drinks, networking **6:30 – 7:30pm:** Technical talks + Q&A **7:30pm onwards:** Networking **Technical Speakers** * ​Data @ The Economist - **[Luca de Michele](https://www.linkedin.com/in/luca-de-michele-232432148)** * Data @ Lawhive - **[Pablo Fernandez](https://www.linkedin.com/in/pablofergui/) (Head of Data)** * ​**TBA** ​**Who should attend** * ​Data Engineers & Analytics Engineers * ​Platform Infrastructure Data Ops teams * ​Anyone building, scaling, or maintaining production data pipelines

Hola, ¿qué tal? Este curso avanzado está pensado para estudiantes que desean perfeccionar su fluidez, ampliar su vocabulario y expresarse con naturalidad y precisión en contextos formales e informales. 🗓 **Cuándo**: Los miércoles, de **19:30 a 21:00** (hora del Reino Unido) **del 21 de enero al 25 de marzo de 2026.** 💻 **Modalidad**: Online por **Zoom** 💷 **Precio**: £170 por 10 clases de 90 minutos 📘 **Libro del curso**: *Aula C1* – Editorial Difusión 📝 **Inscripción y prueba de nivel**: Antes de empezar, te haré una **prueba de nivel gratuita** para asegurar que el curso es adecuado para tí. 📩 Para inscribirte, solo tienes que **enviarme un email** a irene@aprendeahoraconirene.co.uk Soy Irene, una profesora de español con **más de 10 años de experiencia** enseñando a adultos de diversos orígenes. En mis clases sigo el **enfoque comunicativo**, lo que significa que aprenderás a usar el idioma en situaciones reales a través de la comprensión oral y escrita de forma integrada en contextos concretos. El objetivo es que puedas desenvolverte con soltura en conversaciones complejas, debates, presentaciones y textos escritos avanzados. Hasta pronto ;)

Elixir London Meetup; February 2026 edition. All are welcome. **Session 1: Bryan Hunt - Faria Data Platform: Building a data platform in Elixir** How to build an ETL pipeline using Amazon Athena, and Elixir: techniques, tools, UX, lessons learned. **Session 2: Christoph Beck** **\- Structured Generation and Logits Processing with Elixir** Ever tried to get a poem from an LLM doesn't contain the letter \`e\`? Large Language Models are kind of amazing and surprisingly unreliable at the same time. Using Elixir's Bumblebee and open source LLMs, you can get much better control over the generation. We introduce you to logits processing, and how it can be used to achieve what ChatGPT can not accomplish. *The event is kindly sponsored by* [Verna](https://verna.earth). **Time** Doors open at 18, start at 18.30. **Venue** Geovation F4, Sutton Yard, 65 Goswell Rd., London EC1V 7EN **Refreshments** Food and drinks will be provisioned on the day. **IMPORTANT**: **If you wish to take photos and post online during the event, please notify organisers first, so that attendees can opt-out from being in photos.**

We play every Wednesday 9pm at Kings Cross Outdoors Space, Hard surface pitch • 1 hour game • Friendly game • Hard surface pitch, no studs of any type allowed • Closest station: Kings Cross • Book your spot online via Footy Addicts website - www.footyaddicts.com All bookings are managed via Footy Addicts website ONLY! We do not use Meetup any more to manage our attendance list. Please sign up on Footy Addicts and confirm your attendance online!

## Details Welcome to the DevSecOps London Gathering February Event on Wednesday 19 Feb in collaboration with London DevOps! We bring you two amazing talks, as well as the usual conversations, pizza and beer! 📍 **Hosted at Autogen AI, Pentonville Road, London** 📅 **Wednesday, 19 February** 🕕 **6:00–8:00 PM** ## Talk 1 **Abstract:** Concrete CMS, a popular open-source content management system, contains a critical flaw in its file upload functionality that can be exploited in two distinct ways. This talk demonstrates how a single upload can lead to a Server-Side Request Forgery (SSRF), allowing access to internal cloud resources, and a double race condition that enables Remote Code Execution (RCE) via a malicious backdoor. We’ll walk through the exploitation process, show how existing protections can be bypassed, and highlight practical steps to secure file upload mechanisms in real-world applications. ## Talk 2 **Abstract** Treat authentication as a production-critical system with its own failure modes and operational risks. In this talk, I break down real-world auth incidents involving JWKS rotation errors, refresh token storms, clock drift, and session store outages. I show how to define SLIs and SLOs that measure user impact and how to build monitoring and alerting that expose real reliability problems. I demonstrate practical guardrails such as token caching, exponential backoff with jitter, circuit breakers, and feature-flagged degraded modes. Finally, I walk through an incident runbook that helps teams diagnose, mitigate, and recover from authentication failures safely and quickly.

Simple morning mindfulness meditation class at the School of Meditation, in Holland Park. No experience is required, and session is available to everyone...Simply RSVP or just turn up 5 minutes before the start of session to 158 Holland Park Avenue W11 4UH. Discover a deep, inner rest - an enduring part of the mind, beyond our normal cares and worries.

We're hosting our first meetup of 2026 in collaboration with our friends from **DevSecOps London Gathering**. We'll be generously hosted at the AutogenAI offices near King's Cross, and we'll feature two talks that should be of interest to both audiences. **6:00pm - Arrival** **6:45pm - Introductions** **7:00pm - The Talks** **Concrete Evidence: Two Races, One RCE** - [Adrian Tiron](https://www.linkedin.com/in/tironadrian/) Concrete CMS, a popular open-source content management system, contains a critical flaw in its file upload functionality that can be exploited in two distinct ways. This talk demonstrates how a single upload can lead to a Server-Side Request Forgery (SSRF), allowing access to internal cloud resources, and a double race condition that enables Remote Code Execution (RCE) via a malicious backdoor. We’ll walk through the exploitation process, show how existing protections can be bypassed, and highlight practical steps to secure file upload mechanisms in real-world applications. Adrian is the Co-Founder and Principal Pentester/Red Teamer at Fortbridge, bringing over 20 years of hands-on experience in cybersecurity. Adrian is known for delivering highly technical, practical content drawn from real-world assessments, and is passionate about pushing the boundaries of modern application security. **Keeping login from taking down your product with an SRE approach to auth –** [Viola Lykova](https://www.linkedin.com/in/violaly/) Treat authentication as a production-critical system with its own failure modes and operational risks. In this talk, I break down real-world auth incidents involving JWKS rotation errors, refresh token storms, clock drift, and session store outages. I show how to define SLIs and SLOs that measure user impact and how to build monitoring and alerting that expose real reliability problems. I demonstrate practical guardrails such as token caching, exponential backoff with jitter, circuit breakers, and feature-flagged degraded modes. Finally, I walk through an incident runbook that helps teams diagnose, mitigate, and recover from authentication failures safely and quickly. Viola is a Senior Software Engineer in fintech with an SRE mindset, focused on authentication as a production system. I care about reliability, incident patterns, and the kind of testing that still holds up when traffic spikes, dependencies misbehave, or keys rotate at the worst possible time. Viola speaks on practical auth topics across security and reliability. **Participate in a future Meetup** If you'd like to speak at a future meetup, or if you are able to host or sponsor the event, please fill in this [form](https://docs.google.com/forms/d/1FYGHEWTeBb5vVztGGg2YoUJmKR03o9mZaFIghf6vjzo/viewform?edit_requested=true) and we'll get back to you.

Join OutdoorLads popular weekly Thursday Bouldering evening at The Arch in Bermondsey. OutdoorLads London boulderers welcome all members of the LGBTQ+ community You'll be meeting with a supportive group of 5 to 10 plus boulderers who are always happy to introduce complete beginners or solve difficult bouldering problems with enthusiasts. We usually follow up with a pub visit. This event is for members of all levels of experience and all are welcome to come along to any of the sessions. Bouldering is a form of climbing where instead of long high routes, the 'problems', as they are referred to, tend to be shorter and focus on technique, balance, body positioning and sometimes power. Because of this different emphasis, bouldering doesn't have the hassle of climbing with ropes, harnesses and belaying, which makes the activities excellent for newcomers to the sport. If you're a seasoned climber you won't need convincing about the benefits of bouldering, but for those who've never climbed more than a staircase, the benefits are wide ranging: from the physical - improved strength, tone, balance, power and coordination; mental - problem solving, focus, concentration and body awareness; to the emotional - relaxation, a sense of achievement and a feeling that mind and body are working together perfectly ('feeling psyched'). On top of all this, bouldering tends to be a very social sport where you can hang out with mates and each have a go as you feel regardless of what level you climb at.

Join OutdoorLads weekly Saturday bouldering morning event at Vauxwall West - please check our main event page on our website (link in the comments below). We welcome all members of the LGBTQ+ community, and you will be socialising with a supportive group boulderers who are always happy to introduce complete beginners to the sport or solve difficult bouldering problems together. This event is for members of all levels of experience and all are welcome to come along to any of the sessions. Bouldering is unique. There are few sports out there that offer a mental and physical challenge no matter what skill level you are at. Each route consists of several holds that the climber uses, focusing on problem-solving and technical movements to help them reach the top. No two routes are ever the same, and the colour-coded system indicates the difficulty level, so there's a climb for everyone to enjoy! If you have never tried bouldering before, please ensure that you have gone through the centre's safety and induction video beforehand (https://londonclimbingcentres.co.uk/pre-register/) as you will be required to answer a few safety questions when registering at the centre.

Hi Architects, Welcome to our the inaugural AWS London Well-Architected User Group Meetup!!! 🥳🥳🥳 The AWS London Well-Architected Meetup is the latest chapter in the most popular AWS Meetup group globally. At each meetup we covered off various pillars of AWS best-practice in detail including insights from industry leaders that specialise in the Well-Architected Framework. And a drones giveaway. We'll be announcing more speakers during the coming months but our speakers this month include: * **Are you Well-Architected? Will Lawrie - Business Development Manager @ AWS** * **Well-Architected as a Business Tool: Translating Pillars into Business Outcomes - James Harding, Technical CSM @ Green Custard** * **Understanding and Remediating Opportunities** **-** **Aoife Egan, Cloud Optimisation Solutions Architect II @ AWS** This month's menu will include: * Pizzas * Beer * Wine: Big and red 🤤 So come join us at 5:30 for a 6pm start, followed by beer, wine, pizza and friendly networking after our talks :-) \*\*\*NB: No entry to the building after 6pm. Photo ID required.\*\*\*

*"The day starts with a cockerel crowing and waking Heimdall, the watchman, who blows his horn Gjallir to call the gods. Nature is in confusion and the seals rush onto the land."* Ragnarök Vikings settled in the 9th-C and from 1016 to 1042, England was Danish. Barely a trace remains in this part of the country; however this walk to idyllic Wealden countryside passes through a Viking place. Follow through a door telling the legend of Ragnarök, to find what lies behind. *Hyrst* at the time meant a wooded hill. Sissinghurst Castle garden is famous for its roses. These live behind a National Trust paywall; however we shall see as much of the site as possible from adjacent public footpaths. Outward Travel: Take the train departing 9.43 AM from London Bridge to STAPLEHURST. The return train fare with a Network Card or GroupSave is £14.75. The organiser will be standing in front of the ticket office at London Bridge from 9.15 wearing yellow to act as a focal point for people to arrange group train tickets. Walk start: 10.35 AM from Staplehurst rail station. Bring a packed lunch. Village / pub stop. Circular walk. *How to join?* * The walk is entirely free of charge; * You only arrange for your own travel and pub expenses; * Understand our terms and conditions below (the "IMPORTANT" part); * Understand how to stay safe outdoors, as you will be responsible for yourself. See our quick safety tips: http://www.meetup.com/Free-Outdoor-Trips-From-London/about/ *What to bring* * Plenty of water, 1-2 litres recommended * Enough snacks and packed lunch to keep you energized along the walk * Extra snacks and an extra packed lunch just in case * Rainproof (ideally waterproof) clothing, sturdy shoes/boots you don't mind getting muddy * Spare socks * Walking poles and/or an umbrella :-) * Yourself... * ...and your camera! * Cash for train ticket * Cash for pub at the end of the walk? Feel free to ask any questions in the comments section! IMPORTANT Please bear in mind this is a free of charge, self-guided trip with a hobby group. It is not organized by a business nor any entity with commercial purposes. Any trip details, travel advice, route planning, instructions and other content in our group merely represent our shared personal knowledge, research and suggestions as outdoor enthusiasts. As this is no business, there is no "product", "service" or "package" and also no "tour guide", "operator" or "walk leader". Each participant is responsible for their own safety. Even if some of us are very experienced walking outdoors, nobody assumes responsibility for any kind of injury, damage or loss that may happen. Despite this, we take extreme precautions and all trips we plan are very safe, fun, highly educational and popular. Our experienced members volunteer their time and effort to shape a pleasant and quality adventure for everyone :-) By participating you acknowledge and agree with this disclaimer. Here are our tips on staying safe during outdoor trips: http://www.meetup.com/Free-Outdoor-Trips-From-London/about/ TRAVEL, ACCOMMODATION, INSURANCE Although we provide detailed suggestions, each participant is expected to arrange their own travel - this gives everyone the freedom and choice. Anyone interested in travel or outdoor insurance should also arrange this on their own. As mentioned above we always take extreme precautions, but some people may still feel safer if covered. As most of our trips are confirmed or postponed very close to the event date - heavily depending on the weather forecasts - we advise not to buy this until the last minute. People getting tickets from the same station are encouraged to meet early on the day to benefit from discounts such as GroupSave.

For our February meetup, we're looking forward to welcoming Steven Spencer to talk us through a real-world implementation of Microsoft Fabric at the NHS Business Services Authority (NHSBSA) *\*\* Please only register if you are able to attend as the number of available places is limited \*\** **Fabric Implementation Journey at the NHS Business Services Authority (NHSBSA)** Two and a half years ago the Fabric platform was evaluated as part of an investigation to replace the legacy data platform in use by the NHS Business Services Authority. During this period a proof of concept was built based on one of our smaller datasets to test for suitability. The NHSBSA are now 18 months into the migration proper and look to complete during the coming year. This talk covers the journey, the highlights, the decisions and their reasoning, and the learning points discovered during the process. **Agenda** 18:30 - Welcome, drinks, pizza & networking 19:00 - Main Session 20:00 - Close **Venue** Tenth Revolution offices in London. Aldgate House, 33 Aldgate High St, London EC3N 1DL Please provide your first and last name when registering for the event, as this is provided to building security to allow you entrance into the venue.

🗓 **Agenda:** * 6:00pm: Doors open * 6:00pm - 6:30pm: Food, Drinks & Networking * 6:30pm - 7:15pm: Rafael Natali, Lead DevSecOps, Marionete * 7:15pm - 8:00pm - Additional Q&A & Networking 💡 **Speaker:** Rafael Natali, Lead DevSecOps, Marionete **Abstract:** Kubernetes gives us abstraction and power—but with great YAML comes great responsibility. In this talk, we’ll walk through live demos of real-world misconfigurations that allow attackers to escape containers and tamper with the host. You’ll see exactly what happens when Pods run in privileged mode, use hostPath volumes carelessly, or retain excess Linux capabilities. We’ll also show how to detect these attacks in real time using Falco, and enforce safety nets with Pod Security Admission. If you’ve ever wondered "what’s the worst that could happen?"—this session answers that with receipts. **Bio:** [Rafael Natali](https://www.linkedin.com/in/rafaelnatali/) has 20 years of experience in the IT industry, specifically as a System Administrator and DevSecOps professional. Throughout his career, he has developed extensive knowledge in designing, operating, and troubleshooting solutions that prioritize scalability and reliability. Rafael is also an expert in Automation as well as Continuous Integration and Delivery. He has been working with Kubernetes since 2018 and is recognised as a [Kubestronaut](https://www.cncf.io/training/kubestronaut/) since 2024. Currently, Rafael leads a team that is implementing a hybrid streaming data and analytics platform for a major insurance company in the UK. \*\*\* DISCLAIMER NOTE: We are unable to cater for any attendees under the age of 18.

**Important:** Register on the [event website](https://www.aicamp.ai/event/eventdetails/W2026021910)[ ](https://www.aicamp.ai/event/eventdetails/W2025110510)is required for admission. We are excited to partner with Coder for a special edition of our AI Meetup in February, focusing on AI governance and compliance for developers. AI is already part of how developers work: Coding assistants. Autonomous agents. Background tasks. PR reviews. But in most companies, AI usage is either completely ungoverned or quietly blocked. This meetup is for developers who want to understand what AI governance actually means in practice, without turning their workflow into a compliance nightmare. We’ll focus on how teams are introducing guardrails that protect source code, credentials, and infrastructure while still letting developers move fast. No policy decks. No buzzwords. Just real examples of how AI agents are being used safely inside modern dev environments. **You’ll walk away with:** * \- A clear understanding of what AI governance actually means for developers\, not just security teams * \- Insight into why AI agents need different permissions than humans and where most teams get this wrong * \- Practical examples of how guardrails can speed teams up instead of slowing them down * \- A simple mental model you can apply whether you’re experimenting with AI locally or rolling it out across a team **Who this is for:** \- Beginner → intermediate software developers \- Platform engineers and DevOps folks supporting dev teams \- Anyone using \(or wanting to use\) AI tools beyond simple autocomplete **Agenda:** \* 6:00pm\~6:30pm: Checkin, Food and Networking \* 6:30pm\~6:45pm: Welcome/community update \* 6:45pm\~8:30pm: Tech talks and Q&A \* 8:30pm\~9:30pm: Open discussion & Mixer **Tech Talk: AI Governance for Developers** **Speaker:** Eric Paulsen, Field CTO, Coder **Abstract:** In this session, we will deep dive into AI governance for developers. We will explores the often-unseen risks developers face when using AI tools—from unintended data exposure to tool lock-in—and how teams can implement lightweight, developer-friendly governance. Learn how to build secure, standardized AI workflows that provide guardrails without slowing innovation, so you can ship with confidence. **Speakers/Topics:** Check the [event website](https://www.aicamp.ai/event/eventdetails/W2026021910) for speakers and topics. If you have a keen interest in speaking to our community, we invite you to submit topics for consideration: [Submit Topics](https://forms.gle/JkMt91CZRtoJBSFUA) **Sponsors:** We are actively seeking sponsors to support AI developers community. Whether it is by offering venue spaces, providing food, or cash sponsorship. Sponsors will not only speak at the meetups, receive prominent recognition, but also gain exposure to our extensive membership base of 20,000+ AI developers in London and 500K+ worldwide.

Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/cbus-hug-2026/

This meetup is a beginner-friendly, hands-on workshop focused on building shaders in Unity using Shader Graph. Instead of slides or theory-heavy lectures, we'll build real shaders together step-by-step. The format is structured but interactive. You'll watch a quick demo, then build each shader yourself with guidance. By the end, you'll have created multiple shaders you can immediately use in your own projects—and understand how to make more. **What to Expect:** * Build 4–5 complete shaders from scratch * Color tints, snow accumulation, scrolling water, dissolve effects, and more * No prior shader experience required * Checkpoint files provided if you fall behind * Resources for continued learning All experience levels are welcome. Whether you've never opened Shader Graph or just want to fill gaps in your knowledge, this is a supportive space to learn by doing. **Food and drinks provided. Join us to learn, build, and level up your shader skills.** I added the Unity project to the repo here - https://github.com/EricJRico/IntroToShaders.git This is what we'll be using for the session.

**NEW LOCATION: 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). See the handy Parking Map - we recommend street parking. [Street Parking Map](https://docs.google.com/presentation/d/1u2A4fLNlxwLJn0KA_hKc8bnFlFHLvsHBDh-_8wzX_tk/edit?usp=sharing) 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 centralohpython@gmail.com

Excited to share that AWS Cloud Club's first meeting will take place on Thursday, February 26th at 5pm - 6pm! We’re collaborating with [Big Data & Analytics Association](https://www.linkedin.com/company/big-data-analytics-association/) to host [Alok Jha](https://www.linkedin.com/in/alok-jha-42abb928/), Head of Product Management for AWS Intelligent Application Protection at Amazon Web Services, for a tech talk + Q&A on his journey in leading cutting-edge innovation in industry. If you’re interested in cloud, cybersecurity, AI, or product management, this is a session you won’t want to miss. Make sure to join our Meetup and GroupMe to stay up to date for future events and collabs!

**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 You will need to scan your ID at the door to get a visitor badge. **Abstract** *Spec-Driven Development with GitHub Spec-Kit: From Intent to Implementation* Spec-driven development flips the traditional workflow on its head: instead of code being the source of truth, the specification becomes the backbone of design, collaboration, and delivery. In this session, we’ll explore how GitHub Spec-Kit enables teams to treat specifications as first-class artifacts—living documents that drive architecture, implementation, and verification. You’ll learn how Spec-Kit helps teams clearly express intent using structured, version-controlled specs that live alongside code. We’ll walk through a practical workflow that starts with defining system behavior and constraints, then progressively refines those specs into testable, automatable outcomes. Along the way, we’ll show how specs can reduce ambiguity, improve cross-functional collaboration, and make design decisions explicit before a single line of production code is written. This talk will cover: --What spec-driven development is (and what it isn’t) --How GitHub Spec-Kit fits into modern developer workflows --Using specs to align product, engineering, and AI-assisted development --Real-world examples of turning specs into implementations with confidence Whether you’re building greenfield systems, integrating AI into your stack, or trying to reduce costly rework, spec-driven development offers a scalable way to move faster without sacrificing clarity. Attendees will leave with concrete patterns and a clear mental model for adopting GitHub Spec-Kit in their own projects. **YouTube Link** TBA