Cryptography

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.**

LOW TIDE FINE ART LONG EXPOSURE PHOTOGRAPHY Learn to create the dreamy effects this type of photography can create. You have the ability to blur clouds, cars, etc or create surreal, dreamy, or dramatic effects on water and sky. For this session we'll shoot the river at low tide. Low tide will give us a unique view of London Bridge and our other locations including the Shard. This type of photography is associated with fine art photography due to the surreal effects long exposures can bring. **Kase Filters** Today we'll be providing the amazingly quick and compact Kase Magnetic filters. Filters will smooth water, blur clouds and make moving objects disappear. If you are interested in buying and would like a 10% discount: Website: [www.kasefilters.com](http://www.kasefilters.com/) Discount code: **10kaalex** WHAT YOU WILL LEARN * Master visual effects using ND filters * How to expose, focus and compose your image * Camera settings for water/cloud movement * Best practise for long exposure photography REQUIRED EQUIPMENT * A tripod * Shutter release * Lens: 18-55mm, 24-70mm or wider EXPERIENCE * Beginners / refreshers CLOTHING * Check the weather and dress accordingly * Wear good walking shoes OTHER ESSENTIALS * As usual check the TFL website for any delays that may interrupt your journey Contact * Alex 07956264049 UPCOMING EVENTS [https://www.meetup.com/londonphotographiclcp/events/calendar/](https://www.meetup.com/londonphotographiciop/events/calendar/)

Hi friends, Off to a great start! Our first event made one thing clear, we got together because we all agree it’s surprisingly hard to meet others in our field outside of work or a commercial conference. As a smaller group, we make meaningful connections with like-minded actuaries and quants. Lifelong friendships are forged along the way! Whether you're a veteran, a rising star, or simply new in town and want to expand your social circle, get into the insurance and banking space, or see a friend you know, this is the place to be! No guest speakers nor rigid agenda, just a casual meetup and lots of fun conversation! 🥳 We're also on Luma, so please follow us there too! [https://luma.com/friendly-actuaries](https://luma.com/friendly-actuaries) See you soon! NOTE: Please remember to bring your ID with you, as all guests must be of legal age to enter the venue. **About Us** We're a sister group of [The Friendly Data Meetup London](https://www.meetup.com/the-friendly-data-meetup/?eventOrigin=home_groups_you_organize), a bootstrapped 2000+ person group (and still maintains that small cozy vibe!). This one is focused on actuaries and quants :D 🤗 Welcome actuaries, quants and friends! Sometimes, it can be difficult to make friends within the field, and that's what we're all about! We're a group of like minded individuals who understand the highs and lows of working in finance and insurance. ✅ Our primary goal is to have higher quality conversations that are more meaningful, with smaller groups so that we get to spend more attention on each individual. 💯 If you're already reading this, you're definitely welcome! We welcome everyone, whether you're already in the field, looking to get started or just curious! 🗨️ Bring your friends, bring your plus ones, we're all just here to have a good laugh and a good chat about the world, even if it isn't always about our work. **Our values:** 📖 Openness - We welcome everyone 🤝 Trust - Build long-lasting friendships together 💝 Care - Be kind to others and help each other out **Who it's for:** \- Life Actuaries \- Non\-Life Actuaries \- Health Actuaries \- Pensions Actuaries \- Reinsurance Actuaries \- Quantitative Analysts \- Quantitative Traders \- Investment Bankers \- Portfolio Managers \- Financial Engineers \- Entrepreneurs\, Contractors \- Anyone who works with Insurance\, Pensions\, Hedge Funds\, Investment Banks\, Asset Managers etc\. \- Anyone looking to get into the space \- Friends **How to Make the Most of the Meetup** The Friendly Meetup for Actuaries and Quants has one simple purpose: meaningful connections. We're not just a community of people, we're friends who get invested in each others lives. We check in on our friends regularly, and personally. So come and join us, more than just once or twice! **Code of Conduct:** The Friendly Meetup welcomes all genders, nationalities, ethnicities, backgrounds, identities etc. There is a strict no discrimination policy in adherence to our code of conduct and our guiding principles. We maintain a zero-tolerance policy for hateful or antisocial behaviour. In short, be kind to others. Do not insult or put down others. Behave professionally, don't make others uncomfortable. Remember that harassment and sexist, racist, or exclusionary jokes are not appropriate for The Friendly Meetup.

\*\*Fadi K & F K Dance team - present The best Salsa Night the UK has ever seen. **With FREE INTRO SALSA CLASS at 7:00PM** & Free Entry All Night !! Classes 7:00 PM - FREE INTRO TO SALSA CLASS This Class is an introduction to our regular 2 hours salsa classes run every Thursday 7:30 & 8:30 **CROSS BODY SALSA** 7:30 Level 1 & Level 2/3 8:30 Level 1, Level 2 & level 3/4 Beginners / improvers / intermediate **Teachers** ▪️Fadi K & Cristina Varga ▪️Camy Marina ▪️Tiffany Salsera ▪️Chris diamond ▪️F K Dance Team & Guests on Rotation DJs ▪️ Fadi K & Guests on rotation PRICES £10 FOR 1 CLASS £15 FOR 2 CLASS A night brought & created by dancers to the dancers. Great dance floor / Happy hour / ultimate location & late party till 11am. More info 07907945534

**PLEASE NOTE WE WILL BE CLOSING OUR MEETUP GROUP IN JUNE 2025 due to spiralling costs of membership.** **YOU CAN FIND US HERE INSTEAD:** \* FACEBOOK: [www.facebook.com/groups/crystalpalaceboardgamesbeyond/](www.facebook.com/groups/crystalpalaceboardgamesbeyond/) \* WEBSITE: [https://sites.google.com/view/boardgamesandbeyond/home](https://sites.google.com/view/boardgamesandbeyond/home) Join us for an epic game night filled with social fun and exciting tabletop games at Crystal Palace Board Gamers meet-up! Whether you're a fan of strategy, dice, card, or board games, there will be plenty of options for everyone to enjoy. This is a fantastic opportunity to make new friends, connect with fellow gamers, and immerse yourself in a night full of fun times and laughter. So grab your favorite game and come join us for an unforgettable gaming experience. Let the games begin! Feel free to join us by hitting that attend button below. **What to expect:** * We meet at the Anerley Arms (next to Anerley train station) from 7pm (there is food available at the bar) * If you do not have a game setup, you can arrive at any time. If you do have a game to set up we recommend getting there earlier. * It is a relaxed atmosphere, where we generally prioritize company over fierce competition. * Please bring along any games you think we might enjoy, or you can play from the games that others bring. * We split into a few groups based on people's game preferences and numbers, and usually have plenty of time to try a few games over the course of the evening. * The event hosts are regular attendees but might not make it to every event - if you can't spot us, then just approach the folks sitting at tables surrounded by board games (usually on left as you come in the door). We're a friendly bunch and will be more than happy to welcome you. (Please update your RSVP if it turns out you'll be unable to attend, to free up your space for others who may otherwise miss out!)

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.

**Let's Shoot Noir Street Photography in Soho London After Dark** This mini-workshop event focuses on shooting street photography after dark. You will learn tips for low-light shooting, handheld techniques, and how to creatively use existing city lighting. Soho after dark has a completely different energy. Neon signage, theatre lights, and passing traffic create natural contrast, cinematic tones, and deep, moody shadows. The location itself becomes part of your frame, adding atmosphere without the need for a flash. This session focuses on capturing moody, neon-lit street photography using the city’s existing lights. You’ll learn to see, interpret, and use the available light creatively. Occasionally, a model will be present as a point of focus to help you practice shooting subjects in various real-world night-light conditions. *** **What You Will Learn** * **Reading Available Light:** Observe neon signage, street lamps, traffic, and reflections and use them creatively in your shots. * **Handheld Night Shooting:** Adjust ISO, shutter speed, and aperture for sharp, well-exposed images while shooting handheld. * **Creative Use of Light on Subjects:** Learn how to make people stand out using the available neon and street lighting. * **Exposure and Mood Control:** Balance highlights, shadows, and neon to capture the “noir” atmosphere. * **Quick Observation & Reaction:** Train your eye to spot photo opportunities in challenging night conditions. * **Getting to Know Your Kit:** Understand what your camera and lenses can do in low light so you can react confidently. *** **What to Bring** * **Camera Kit:** A fast lens (prime or zoom, around 35–50mm, f/1.4–f/2.8) is highly recommended for best results at night. You may bring your best lens for practice, but you may struggle more in lower-lit situations. Message me if you want advice on gear before booking. * **Essentials:** Cleared memory card and fully charged batteries. Extra batteries recommended. * **Travel Light:** Comfortable shoes and clothing suited to the weather. *** **Event Info** * **Duration:** 2 hours * **Group Size:** Max 5 * **Meeting Location:** Soho, London *** **PAYMENT OPTIONS** * RSVP via Meetup (standard fee applies) * Or send £25 via PayPal to **street@lindawisdomphotography.com** — no extra fee * Message me to confirm your spot & I will add you to attendee list. \*\*\* **Bonus for Members** * **FREE DOWNLOAD – Beginner Street Photography Tip Sheets:** Master Night Street Photography For Beginners Tip Sheet covering the key topics from this event. You will receive a download link to follow along during the session. * **FACEBOOK COMMUNITY GROUP:** A private group for Meetup members to showcase their best work, receive critique, advice, and tips.

Gordon Parks was a ground-breaking photographer, filmmaker, author, and composer. You do not want to miss this very important and extraordinary FREE exhibition! The exhibition underscores Parks’ famous philosophy of using his camera as a weapon to fight injustice. Rather than focusing solely on victimization, the curated photos emphasize the strength, beauty, and humanity of the subjects. The plan is to meet at Waterstones in the cafe on the lower ground floor - then head to see the exhibition before heading out to do some street photography. WHAT YOU WILL LEARN * Street photography tips and techniques * Posing or candid * Photographers rights We will have a series of exercises to help you hone your eye for street photography. EQUIPMENT: * Any camera * 50mm F1.8 is recommended * A lens with a fast aperture (f1.8-f2.8) OTHER ESSENTIALS * A fun and experimental attitude! PAYMENT OPTIONS * PayPal via RSVP - Meetup transaction fee will be added. and you'll automatically be added to attend * Send £25 via PayPal to \*\*[creativebeansproductions@gmail.com**](http://creativebeansproductions@gmail.com%2A%2A/) with no extra fee. * Text Alex on 07956264049 and we will add you to the event attendee list. TRAVEL * As usual check TFL website for any issues that may delay your journey. CONTACT Alex 07956 264049 **VENICE PHOTOGRAPHY WEEKEND - Oct 2026** [https://www.meetup.com/londonphotographic/events/313109100/](https://www.meetup.com/londonphotographic/events/313109100/) **UPCOMING EVENTS** [www.meetup.com/londonphotographic/events](https://www.meetup.com/londonphotographic/events) Photo ©Gordon Parks

**£10 CASH FOR YOGA / £10 CASH FOR BOOK CLUB - payable on the door** **Bitcoin discount [HERE](https://btcpay.btc.aw/apps/rvvVwGSSSiJ7UgtzjmBdxy1Uq6a/pos "https://btcpay.btc.aw/apps/rvvVwGSSSiJ7UgtzjmBdxy1Uq6a/pos")** Join Storm and Annie V for another mind/body session at Cyphermunk House. Yoga starts at 11am - please bring your own mat. Munk Brunch follows at Ana's Deli from 12pm. Book club starts at 1:30pm. Promotional activities related to altcoins not permitted. No unsolicited photograhy. Peace and love.

**Develop Your Eye for Everyday Street Scenes** **– Central London** This mini-workshop is all about observing and capturing the fleeting moments and unpredictability of people on the streets. You will learn how to anticipate, spot, and photograph fleeting moments. These unscripted interactions are the heart of street photography. Having shot the streets for 16 years, I know what makes a moment compelling. The challenge—and the skill—is seeing what others don’t. Through practical, creative challenges I give during the session, you’ll start training your eye to notice gestures, expressions, and interactions that often go unnoticed, helping you capture candid, real-life stories as they unfold. By the end of this workshop, you’ll begin to see and photograph these fleeting moments and interactions that can make street photography compelling, and you’ll understand how, with practice, your eye will start spotting these moments instinctively. **What You Will Learn** * **Observing People & Interactions:** Learn to develop your eye and recognise photo-worthy moments. * **Being Discreet:** Learn techniques to take non-intrusive candid shots. * **Timing & Decisive Moments:** Learn to anticipate the right moment to press the shutter. * **Quick Reaction Skills:** Develop instincts to notice fleeting moments that make images compelling. * **Understanding Your Camera:** Get guidance to adjust settings quickly and react to changing scenes. *** **What to Bring** * **Camera Kit:** Any camera works—DSLR, mirrorless, or smartphone. Any zoom or prime lens can be used. 24 mm and 75 mm is ideal for capturing street portraits and candid moments. *** **Event Info** * **Duration:** 2 hours * **Group Size:** Max 5 * **Meeting Location:** Central London, exact spot provided after booking *** **PAYMENT OPTIONS** * RSVP via Meetup (standard fee applies) * Or send £25 via PayPal to **street@lindawisdomphotography.com** — no extra fee * Message me to confirm your spot & I will add you to attendee list. \*\*\* **Bonus for Members** * **FREE DOWNLOAD – Beginner Street Photography Tip Sheets:** Covering the key topics from this session. * **FACEBOOK COMMUNITY GROUP:** Private group for Meetup members to showcase their work, receive critique, advice, and tips.

A regular meetup for those committed to practising and improving their Arabic. It is designed for those who know the very basics and want a structured opportunity to practise reading, listening, speaking, and building confidence. If you're still learning the very basics but want some motivation to keep going, you're very welcome to join. Note: This is a practice group facilitated by a native speaker - not a formal teacher or taught class, and not a Quran teaching session. 📚 SESSION FORMAT: ⏱️ 30 mins Intro & Social: We'll go around and introduce ourselves in Arabic. Feel free to prepare 2-3 sentences beforehand if you don't like being put on the spot! 🗣️ 60 mins Structured Practice: A focused session practising together with guidance : ◾ Taking turns reading passages aloud ◾ Listening to excerpts from an audiobook ◾ Working together to translate and understand the text 💬 Continued Socialising: Feel free to stick around afterwards for more informal chat and connection. ✊ Note: Active Muslims is equally about focusing on the actual activity, in this case, it is a practice session requiring mental engagement and active participation (and not just a social), therefore it is advised to approach and attend these events with that mindset, intention and purpose. 📍 LOCATION: Barbican ⌚ MEET: By the cafe G Level (Benugo) ⏱️ TIME: Meet from **11:00am** for intros and socialising. The practice session starts promptly at **11:30am** insha'Allah. 🎒 What to bring: 📚 Any Arabic texts you would like to read 🎧 Headphones (optional, if you prefer listening privately) ➖➖➖➖➖➖➖➖➖➖➖➖ If you can no longer attend, please update your RSVP to free up your spot for someone on the waiting list. ➖➖➖➖➖➖➖➖➖➖➖➖ 🌐 **[@Active.Muslims](https://www.instagram.com/active.muslims)** *(Follow for latest events updates)*

**Join the London Investors and Traders Group for an afternoon of discussion and networking focused on trading and investing** Whether you are a short-term trader or a long-term investor, this event offers a platform to discuss market trends, exchange ideas and strategies, and potentially collaborate on future trade and investment projects. Don't miss this opportunity to enhance your trading and investing knowledge and skills while making valuable connections in the trading and investing community. **This event is only for members who have posted RSVPs here.** (Please change your RSVPs early if you are unable to attend so that some of those on the waitlist could) **AGENDA** **15.00 Meet Greet and Network** **16:30 Discussion** Topics for Talks & Discussion: **Current Developments** in the Financial Markets **Active, Passive & Systematic** Investing Strategies **Trading Strategies for** Short, Medium & long-term **Followed by Q&A** **18:30 Close** **We look forward to meeting you at this event!** *(We are a peer group of Investors and Traders, not an advisory service)*

To register for the event ,please click here [https://www.eventbrite.com/e/london-muslim-marriage-event-in-person-tickets-664811588357?aff=meetup ](https://www.eventbrite.com/e/london-muslim-marriage-event-in-person-tickets-664811588357?aff=meetup) Meeting a suitable spouse has become a challenge with our busy lives and the lack of opportunities around us. Come and engage with single Muslims by being introduced to them through fun halal initiatives. Join us for some fun and engaging discussion. Whatever your marital status - there is going to be some open discussion around marriage and relationships, which we hope will change your life and perceptions. The event be will have a mix of group activities and one-on-one conversations. Interested Muslim men and women between the ages of 25- 40 are invited to attend matrimonial event for Muslim singles to find a suitable spouse! \*The attendees will use the Right App's In-person event to connect with others after the event .Right App is a leading platform for online and In-person muslim matrimonial and networking events.Right App is available for download at https://www.therightapp.com/rightapp *Please note, you may be photographed or video recorded during the event .By joining the event , you consent to interview(s), photography, audio recording, video recording and permission to use the material for advertising or other purposes.* Please email us at contact@therightapp.com for any specific queries **FAQs:** **Meeting Location?** The meeting location will be shared only with the registered participants few days before the event **Tell me more about the organizer?** Right App is the largest organizer of online muslim matrimonial events hosting more than 100 events annually. **Can I Volunteer?** Yes please email us Instagram: [https://www.instagram.com/right_app/](https://www.instagram.com/1umatch/) To register for the event ,please click here [https://www.eventbrite.com/e/london-muslim-marriage-event-in-person-tickets-664811588357?aff=meetup ](https://www.eventbrite.com/e/london-muslim-marriage-event-in-person-tickets-664811588357?aff=meetup)

The Humanist Monthly Program is our longest running event and still a community favorite. In the old days it used to be called "Going to HCCO" and we still like to think of it as our flagship event. We will be hearing from Becca Powell, Director of Advocacy and Outreach at Unchained At Last, an organization whose mission is dedication to ending forced and child marriage in the United States through direct services and systems change. Unchained At Last's mission clearly meshes and addresses several of our Humanist Ten Commitments. Becca will educate us about an issue many of us may not be familiar with--but should be. Food and drinks will be provided at the event. Feel free to show up a little bit early to hang out and talk. Going forward our meetings will be hybrid. You can meet us in-person or attend online Join Zoom Meeting [https://us02web.zoom.us/j/87836564953?pwd=4Mi57ElZkDIFlb1fnlNwOJ0NiOK4tP.1](https://us02web.zoom.us/j/87836564953?pwd=4Mi57ElZkDIFlb1fnlNwOJ0NiOK4tP.1) Meeting ID: 878 3656 4953 Passcode: 760812 One tap mobile +19292056099,,87836564953#,,,,\*760812# US (New York) +13017158592,,87836564953#,,,,\*760812# US (Washington DC) The formal presentation will start at noon

Come out to Improving for our monthly iOS and Mac meetings. This Month's Presentation: Nothing yet. (You should volunteer). What is Cocoaheads (http://cocoaheads.org/)? CocoaHeads is a group devoted to discussion of Apple Computer's Cocoa Framework for programming on MacOS X and iOS (including the iPhone, iPad and Apple Watch). During monthly meetings, members present on their projects and offer tutorials on various programming topics. What is BuckeyeCocoa (http://buckeyecocoa.org/)? BuckeyeCocoa is a group of Objective-C/Swift developers/enthusiasts. We host monthly Cocoaheads and near-weekly NSCoder meetings in Columbus, Ohio. The meetings are free to attend. Presentations! Presenters welcome! We are always in need of people willing to present material. Any Swift and/or Objective-C related topic is welcome. Times can be 5 minutes (i.e. lightning talks) to a maximum of 2 hours. Interested? Contact info is on the BuckeyeCocoa website. To volunteer for a presentation contact us at @BuckeyeCocoa on Twitter. Follow us on Twitter! @BuckeyeCocoa (https://twitter.com/#!/Buckeyecocoa/) For more information: http://buckeyecocoa.org/

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)

http://photos2.meetupstatic.com/photos/event/2/a/9/6/600_348310902.jpeg Instructor - Crow, HPS Class fee is $30 at the door or approved exchange RSVP with Advance pay of $25 (discounted) by PayPal on the web or by contacting Enchanted Elements (614) 437-2642. Reservations made directly to Enchanted Elements will be added to the class list manually not online. Private Instruction ~ Closed to the Public ~ Initiated Members Only Please come prepared for ritual. Blessings ~ Crow

Pay attention! We’re delaying a week for those of you who may be on Spring break and/or celebrating the holiday. Ok, no pancakes, but waffles-a-plenty. Join the local UX and Digital Design community for a casual monthly breakfast. Look for us upstairs!

Bring your work or your hobby, hang out, and code with us. Follow @buckeyecocoa for more information.

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.