White Hat Hacking

**Join us for a joint meetup with our friends from Qodo and Tessl** AI coding agents are increasingly embedded in production workflows, but their failure modes are often poorly understood, difficult to detect, and even harder to evaluate systematically. ​This session examines how agent-based systems degrade under real-world conditions, focusing on three critical dimensions: reliability, code quality, and security. We’ll look at where current evaluation approaches fall short, how non-determinism and context drift impact correctness, and why seemingly “successful” generations can still introduce latent defects or vulnerabilities. ​If you’re building, evaluating, or deploying AI agents in production systems, this session will provide a grounded view of where they fail and what it takes to make them robust **Agenda** * ​​​6:00pm Venue opens * ​Join us for Drinks and Pizza! * ​​​6:30pm **Hidden Failure Modes for AI Agents** by Nupur Sharma * ​6:50pm Panel Discussion * ​**Panelists** * ​**Simon Maple -** Developer Relations at Tessl * ​**Brian Vermeer** \- Staff Developer Advocate at Snyk * ​**Nupur Sharma -** Solutions Engineer at Qodo * ​**Kunal Kushwaha -** Senior Developer Advocate EMEA at Cast AI **SPEAKERS** **​** **Simon Maple - Developer Relations at Tessl** ​Simon Maple is the Head of Developer Relations at Tessl, and AI Native Dev co-host. Previously, Simon was the Field CTO, and VP Developer Relations at Snyk, ZeroTurnaround, and IBM. He became a Java Champion in 2014, JavaOne Rockstar speaker in 2014 and 2017, Duke’s Choice award winner, Virtual JUG founder and organiser, and London Java Community co-leader ​ ​**Brian Vermeer** \- Staff Developer Advocate at Snyk ​Staff Developer Advocate for Snyk, Java Champion, and Software Engineer with over a decade of hands-on experience in creating and maintaining software. He is passionate about Java, (Pure) Functional Programming and Cybersecurity. Brian is a JUG leader for the Virtual JUG and the NLJUG. He also co-leads the DevSecCon community and is a community manager for Foojay. He is a regular international speaker on mostly Java-related conferences like JavaOne, Devnexus, Devoxx, Jfokus, JavaZone and many more. Besides all that, Brian is a military reserve for the Royal Netherlands Air Force and a Taekwondo Master / Teacher. ​ ​**Nupur Sharma -** Solutions Engineer at Qodo ​ ​**Kunal Kushwaha -** Senior Developer Advocate EMEA at Cast AI ***

We're really excited to be organising a brilliant free event with three incredible authors, Katherine Faulkner, Emily Freud and Mel Pennant. Following up from last's year International Women's Day event we have a female led panel where, Katherine Faulkner, Emily Freud and Mel Pennant will delve into the art of crime writing — from building tension and crafting unforgettable characters to reflecting social currents in fiction that keeps us turning pages late into the night. Hear how they approach plot twists, moral ambiguity and the genre’s endless capacity to surprise. Tickets Available from the Alternative Book Fair website but there will be space for walk-ins.

Take a break from the busy calendar and join us for **a relaxed offline coffee circle** designed for women in cybersecurity. This is your chance to connect with others in a friendly, relaxed setting. No slides, no speeches, no sales pitches, **just genuine conversation**. We’ll talk about everything from the latest trends in cyber to career journeys, challenges, and even life outside of tech. Whether you’re just starting out or have years of experience, you’ll find a welcoming space to **share ideas, ask questions, and build meaningful connections.** Bring your curiosity, and let’s make cybersecurity conversations as warm and inviting as a good cup of coffee! Meeting Point: Inside the Café. Look for me with an embroidered black tote bag.

𝗝𝗼𝗶𝗻 𝗨𝘀 𝗳𝗼𝗿 𝗮 𝗩𝗶𝗯𝗿𝗮𝗻𝘁 𝗘𝘃𝗲𝗻𝗶𝗻𝗴 𝗼𝗳 𝗦𝗮𝗹𝘀𝗮 & 𝗕𝗮𝗰𝗵𝗮𝘁𝗮 𝗶𝗻 𝗦𝗼𝘂𝘁𝗵 𝗟𝗼𝗻𝗱𝗼𝗻! 💃🕺 Get ready to dance the night away every Wednesday with our fun and friendly Salsa & Bachata classes, followed by an exciting party that lasts until late! 🎉 Why You Should Join Our Awesome Classes: \- 𝗕𝗲𝗴𝗶𝗻𝗻𝗲𝗿𝘀 𝗪𝗲𝗹𝗰𝗼𝗺𝗲: No experience? No problem\! 🌟 \- 𝗡𝗼 𝗣𝗮𝗿𝘁𝗻𝗲𝗿 𝗥𝗲𝗾𝘂𝗶𝗿𝗲𝗱: Come solo or bring friends\! 🤗 \- 𝗠𝗮𝗸𝗲 𝗡𝗲𝘄 𝗙𝗿𝗶𝗲𝗻𝗱𝘀: Connect with fellow dance enthusiasts\. 👫 \- 𝗛𝗮𝘃𝗲 𝗮 𝗚𝗿𝗲𝗮𝘁 𝗧𝗶𝗺𝗲: Enjoy a lively atmosphere and great music\. 🎶 \- 𝗙𝘂𝗻 & 𝗙𝗿𝗶𝗲𝗻𝗱𝗹𝘆 𝗘𝗻𝘃𝗶𝗿𝗼𝗻𝗺𝗲𝗻𝘁: Perfect for all skill levels\. 😊 \- 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲𝗱 𝗜𝗻𝘀𝘁𝗿𝘂𝗰𝘁𝗼𝗿𝘀: Learn from the best in the business\. 👩‍🏫👨‍🏫 \- 𝗖𝗵𝗶𝗹𝗹 𝗩𝗶𝗯𝗲𝘀: Unwind after work in a welcoming space\. 🌈 \-\-\- Class Schedule: \- 7:00 PM: 𝗙𝗥𝗘𝗘 𝗦𝗮𝗹𝘀𝗮 𝗜𝗻𝘁𝗿𝗼 – Perfect for newcomers\! 🎉 \- 7:30 PM \- 8:30 PM: 𝗕𝗮𝗰𝗵𝗮𝘁𝗮 𝗖𝗹𝗮𝘀𝘀𝗲𝘀 – Two levels to choose from\. 💃 \- 8:30 PM \- 9:30 PM: 𝗦𝗮𝗹𝘀𝗮 𝗖𝗹𝗮𝘀𝘀𝗲𝘀 – Three levels available\. 🕺 \- 9:30 PM \- 11:00 PM: 𝗗𝗮𝗻𝗰𝗲 𝗣𝗿𝗮𝗰𝘁𝗶𝗰𝗲 & 𝗦𝗼𝗰𝗶𝗮𝗹 – Show off your moves and socialize\! 🎊 \-\-\- Location: 𝗔𝗱𝘂𝗹𝗶𝘀 𝗘𝗿𝗶𝘁𝗿𝗲𝗮𝗻 𝗥𝗲𝘀𝘁𝗮𝘂𝗿𝗮𝗻𝘁 44 Brixton Rd, SW9 6BT, London Nearest Underground Station: Oval 🚇 \-\-\- Pricing: \- 1 𝗖𝗹𝗮𝘀𝘀: £13 💷 \- 2 𝗖𝗹𝗮𝘀𝘀𝗲𝘀: £15 💰 \- 𝗗𝗮𝗻𝗰𝗲 𝗣𝗿𝗮𝗰𝘁𝗶𝗰𝗲 & 𝗦𝗼𝗰𝗶𝗮𝗹: £5 🎟️ \-\-\- Don’t miss out on an unforgettable evening filled with dance, laughter, and new friendships! We can’t wait to see you there! 🎈✨

This Meet Up is a chance to practice speaking English while meeting new people and making new friends from all over the world. The classes are fun, friendly and informal and we cover a variety of topics. I correct you and give you help with grammar and vocabulary as we go, so you can improve as you speak. I look forward to welcoming you and having a good conversation with you in English soon! TO FIND US: The class is in the CAFÉ on the FIRST FLOOR of the library. In the UK, the first floor is one floor ABOVE the ground floor. From the main entrance, go up the stairs or escalators straight ahead of you. Walk round to your left and you'll see the café. I'll have a sign with 'Meetup' and your names.

WEDNESDAYS at Hammersmith Salsa Club, Hammersmith, London Open Every Wednesday Hammersmith Salsa & Bachata Club, 11 Rutland Grove, Hammersmith, W6 9DH (http://www.incognitodance.com/hammersmith-salsa-club-west-london/) 7pm – 11:00 pm Bachata Classes: 7:30pm – 8:20pm (6 levels) Salsa Classes 8:30 -9:20pm (6 levels) No prior bookings are needed, just turn up and dance. Absolute beginners are warmly welcomed. Wear comfortable shoes and light clothes, to keep you dancing comfortably all night £10 Club Only £16 Two Classes + Club Usually has 200+ dancers every week Fun & friendly classes for dancers of all levels. Plenty of social dancing to the latest Latin grooves.

**Welcome to UK Mafia!** We meet regularly at **The Hydrant (Monument)** on the **Second Floor** (see large function room). It is near **London Bridge**. 1 Monument St, London EC3R 8BG **Do I need to know anything beforehand?** This is a **beginner-friendly** event, and most of you will be playing with us for the first time. You will get to play many games. Most importantly, this is a social activity, so feel free to talk to anyone between the games and have fun! **♂️ What is Mafia?** Have you seen 'The Traitors'? Play the game that 'Traitors' is based upon! Mafia is a 10-player social game; it can get competitive, but it's easy to learn. We play at multiple tables. You get a secret role and work with your team to win. A game lasts about 45 minutes, so we play many during the day. The **Mafia team** tries to hide and eliminate the **Citizens**, while the **Citizens** try to find the Mafia through deduction and logic. While this is a **beginner-only** event, we also host tournaments and online events with more experienced players from around the world. Ask us about our online games and trips abroad!✈️ *** **[How to Play?](https://bit.ly/HowToPlayMafia)** We will teach you how to play when you arrive. You will quickly see that the game has two phases: **Night:** * The Mafia secretly targets a Citizen * The *Don* (Mafia) learns if a player is the *Sheriff* * The *Sheriff* (Citizen) learns if someone is Mafia ☀️ **Day:** * Each player says in their turn who they think the Mafia are * Then, everyone votes publicly to eliminate one player The game continues until the Mafia are eliminated or they outnumber (or equal) the Citizens. We will explain all the rules at the venue, and you’ll pick it up. Want to learn more about the game? See our wide range of resources, including brochures and videos: **[https://bit.ly/EMF-TIPS](https://bit.ly/EMF-TIPS)** *** \*\* Why Mafia?\*\* Mafia is a global game played by over 15,000 people in 50+ countries, with clubs, tournaments, websites, and federations, like the [English Mafia Federation](https://bit.ly/EML2025) and the [Mafia World Cup](https://www.youtube.com/@MafiaWorldCup/streams). --- **❓Questions -** Message any admin, anytime! --- \- Mafia Tips\, Rules\, Videos\, Resources: **[https://bit.ly/EMF-TIPS](https://bit.ly/EMF-TIPS)** \- Watch games and lessons here: **[https://www.youtube.com/@MafiaWorldCup/streams](https://www.youtube.com/@MafiaWorldCup/streams)** **Contact UK Mafia Club** \- UK Mafia Club Instagram **[https://www.instagram.com/uk_mafia_club/](https://www.instagram.com/uk_mafia_club/)** \- UK Mafia Club YouTube **[www.youtube.com/@UKMafiaClub](http://www.youtube.com/@UKMafiaClub)** \- UK Mafia Club Telegram Channel **[https://t.me/UK_MAFIA_CLUB](https://t.me/UK_MAFIA_CLUB)** \- UK Mafia Club Telegram Chat **[https://t.me/UK_MAFIA_CLUB_CHAT](https://t.me/UK_MAFIA_CLUB_CHAT)** \- UK Mafia Club Discord **[https://discord.gg/fQM7duV96D](https://discord.gg/fQM7duV96D)** \- UK Mafia Club Email **[ukmafiaclub@gmail.com](http://ukmafiaclub@gmail.com/)** \- UK Mafia Club Mafgame profile **[https://mafgame.org/clubs/79/view](https://mafgame.org/clubs/79/view)** **Contact the Mafia World Cup:** \- Mafia World Cup Instagram **[https://www.instagram.com/mafiaworldcup/](https://www.instagram.com/mafiaworldcup/)** \- Mafia World Cup Facebook **[https://www.facebook.com/mafworldcup/](https://www.facebook.com/mafworldcup/)** \- Mafia World Cup Telegram **[https://t.me/Mafia_World_Cup](https://t.me/Mafia_World_Cup)**

We are back! This is going to be a monthly IN PERSON meet up in London. A very big thank you goes to Accurx who is hosting us in their amazing Shoreditch offices. This will include access to facilities including coffee! 😻☕️ **Want to know more? 👇** As with all CoffeeOps, this is an interactive, chatty, build your own adventure type of meet-up. Instead of booking in experts to *learn* *from*, we gather a group of practitioners to ***learn*** ***with***. We have been running for over 4 years now and often get feedback that this is the most useful meetup people join! The event is approximately 90 minutes and always starts by brainstorming topics to discuss. The group then votes on the most relevant/interesting to them and we then cycle through the topics trying to discuss each deeply, but in a time bound slot. To get an idea of topics, you can check out our remote board [here](https://easyretro.io/publicboard/h404NF84Uje4tCcxpJdHr4Ycs9B3/a4a35d2b-181b-409b-832e-a729be1af79c). The general gist is anything is fair game, though we tend to revolve around software delivery and definitely lean towards the more Ops-y or DevOps-y side of things.

**SATURDAY** **11/April 3.30pm** Headline Panel *Roxy Dunn and Gonzalo Garcia in conversation with Chloë Ashby* Two hugely exciting literary voices take centre stage in this year’s headliner conversation. Roxy Dunn burst onto the fiction scene with her debut novel *As Young as This*, which was widely celebrated as one of The Independent, Harper’s Bazaar, Stylist, Cosmopolitan and Sunday Times Style’s Best Books of 2024 — a wry, emotionally fluent exploration of love, expectation and the stories we tell ourselves about life and relationships. Her second novel, *Wants and Needs*, continues her beguiling mix of humour and insight, arriving in early 2026. Joining her is Chilean-born novelist Gonzalo C. Garcia, whose debut novel *We Are The End* introduced readers to his distinctive blend of wit and depth and earned critical attention in the UK independent publishing scene. His much anticipated new novel *Telenovela*, set in Santiago toward the end of Pinochet’s dictatorship, arrives in late 2025 and expands his richly human storytelling into bold historical and political territory. In this headliner session, the conversation will be facilitated by *Wet Paint* and *Second Self* author Chloë Ashby. Dunn and Garcia will reflect on how their identities, backgrounds and artistic journeys have shaped their work; how they navigate expectation and evolution from one book to the next; and offer insight and encouragement for emerging writers and indie publishers charting their own creative paths. This event is funded by the Arts Council and is free to attend

PHP London Pub Social – April 9th, Jack Horner, Tottenham Court Road Join us for an informal PHP London pub social at the Jack Horner on Tottenham Court Road! We've got a reserved space from 6:30pm to 8:30pm on Thursday 9th April - a mix of seating and standing with a few tables. This is a relaxed, no-agenda evening — just good conversation with fellow PHP developers over a drink. Whether you're a long-time community regular or coming along for the first time, all are welcome. Places are limited.

Claim your free life coaching session by RSVPing to this event! And I will contact you directly. We have amazing life coaches who can help you in different areas of your life! No matter what is going on, we understand that sometimes it can all be very overwhelming and feel like you have no idea what to do! Come and speak to one of us so get some help!

Elixir London Meetup; February 2026 edition. All are welcome. **Session 1: Anton Borisov - Distilling Kafka's Binary Protocol into Elixir** We'll trace a produce request to show what any Kafka client has to get right. In the BEAM ecosystem, erlkaf wraps librdkafka, brod implements the protocol in Erlang, and [kafka_ex](https://hex.pm/packages/kafka_ex) goes pure Elixir. Kafka_ex's approach is to generate serializers at compile time from Kafka's own schema definitions: plain structs, pattern matching, structural boilerplate isolated from the logic you actually think about. That design is what let us jump two major versions ahead and adapt to significant protocol changes. Let's dig into the idea, the code, and the tradeoffs. **Session 2: Evadne Wu** **\- JavaScript Execution Strategies in Elixir\-based Agent Frameworks** We'll look at integration points between elixir agents (in the AI fashion) and JavaScript execution, and all the foot guns involved. *The event is kindly sponsored by* [Fresha](https://www.fresha.com). **Time** Doors open at 18, start at 18.30. **Venue** Fresha The Bower, 207-211, Old St, Tower, London EC1V 9NR **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.**

You want to do your best! You want to realise your potential! You want to make the right decisions at the right time! Obviously- you want to be a success! Do you have all the skills in place? Do you have areas in your life or personality that are weaker and you feel can stop you or hold you back? Would you like a free personal consultation to help locate your strengths and weaker areas? We can help you to maximise on your potential. If you would like a free 1 hour consult then register now! We have various times available for your own personal consultation This is hosted at the Scientology Life Improvement Centre in London. We use the Oxford Capacity Analysis test. https://www.scientology-london.org.uk/personality-test/

Columbus Code & Coffee is an inclusive, informal co-working session. People of all skill levels attend, and we love it that way. Many people (optionally) bring projects to work on, and many other people (optionally) socialize the entire time. It's entirely up to you! **What to Expect at the Intro Circle** \~\~\~\~\~\~\~\~\~\~\~\~\~ Near the beginning of the event (1:30 pm), we do a standup: * Organizer announcements, updates, and logistics Round 1 - (7 secs max): * Your name * What you're working on * What you can help others with Round 2: * Community events you wanna plug. If none, that's cool too. Round 3: * Job opportunities you're hiring for OR announce that you are looking for one. If none, that's cool. After the introduction circle, everything is self-organized! Feel free to work alone, pair up, attend one of our workshops/presentations, or mingle!

Do you feel introverted when you are in a group setting? Are you shy? Do other people have more fun than you do? There are simple life hacks you can use to improve your connection to others and improve your social life. Talking is one thing. Truly connecting is altogether another. It's the whole experience of connecting with people and forming relationships. It includes the joy, understanding, and love formed among people. * In our meetings, you will learn: * A simple life hack to increase your liking and tolerance of other people, or even of yourself! * How to become more interested and enjoy conversations with people. * How to be comfortable in social settings. * How to be yourself * How to become more extroverted and, * How to make connections with people. Feeling lonely, isolated, or bored? This local meeting is exactly what you need! Come join us! Be sure to click on the red "Attend" button below to come to the local event. We look forward to seeing you there. This group is created by the Dianetics and Scientology life improvement center.

**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** GitHub Copilot is powerful, but what if you could scale from a solo AI assistant to an entire team of specialized agents working in parallel? This session introduces Squad: an open-source framework for multi-agent orchestration that lets you define teams of AI agents with specific roles, responsibilities, and expertise. We'll progress from Copilot basics to the Copilot CLI, explore how Agents add autonomy, and see how Instructions and Skills let you customize agent behavior. Then, the climax: a live demo where a Squad team of 3 agents (Lead, Developer, Tester) stands up and builds a working application in real-time, showcasing true multi-agent collaboration. Whether you're new to AI or exploring how to scale your use of Copilot, this session will show you what's possible when agents work as a team. **YouTube Link** TBD

The Fellowship of the Star Schema: Transforming OLTP Data for Power BI One does not simply build reports on OLTP data. Join us on an epic journey from the depths of raw, normalized tables to the shining halls of a well-modeled star schema fit for Power BI greatness. We will demystify the differences between OLTP and OLAP, walk through star schema vs snowflake (and why Power BI has a clear favorite), and show you the compression differences between normalized and columnar storage that will make you never look at an OLTP model the same way again. We will cover the different types of dimensions, when to use them, and how to handle Slowly Changing Dimensions without losing your mind. You will leave knowing exactly how to identify a bad model, how to convert OLTP data into a clean star schema, and how to forge relationships that rule them all. Whether you are a data wizard, a curious hobbit, or somewhere in between, your models will never be the same.

Join us for an hour of writing! We’ve discovered that it’s strikingly helpful to write with other writers. See if it’s true for you at 7:00pm on Wednesday, April 22 at Streetlight Guild. Be it a book, blog, script, essay, dissertation, resume, melody, poem or just plain work stuff, you are invited to write it with us. No one will see what you've written or give you unsolicited advice. Instead of just thinking about writing, come and get some real writing done. **SCHEDULE:** 6:45ish - Quick introductions 7:00 - Timer starts: write for 1 hour 8:00 - The End **OPTIONAL SOCIALIZING** happens before and after the writing hour. Writing is very solitary. Connecting (and sometimes even commiserating) with other writers is a cool thing. **BEING LATE IS OKAY:** just show up and get settled! If you were on time, please be willing to make room for the friendly latecomer. Happy writing & I look forward to seeing you at Streetlight Guild! **WHAT SHOULD I BRING?** Whatever you need to be able to write! You're welcome to bring earplugs/headphones if noise will bother you! **OTHER IMPORTANT DETAILS:** * **RSVP:** Please RSVP by 6:00pm the evening of the meeting. This helps me know how many to expect, and if we'll need additional space! * **COVID:** While masks are not required, please be mindful of the other writers around you and their comfort levels. * **WIFI/OUTLETS:** Outlets are limited, so please ensure your devices are charged when you come! But Streetlight Guild does have free WiFi! Yay! * **PARKING:** There is free public parking at Streetlight Guild.

AI is changing how art is made. But when does it stop being your work and start being the machine’s? This month we're going to be doing a panel with with digital image, music, and written word artists, talking about at what point, while using AI in the creation process, does the work become not the artist creation? We encourage audience participation during this event that will be moderated by Chris Slee. Whether you’re deep in the field or just getting curious, come connect with others building and exploring AI in Columbus. Sponsored by [Transform Labs](https://www.transformlabs.com/services) Sign up also accessible via [Transform Labs Luma](https://luma.com/55umjqta)