Prototyping

AI assistants are getting more capable. The question is how we build effective workflows around them. At DevDay London, [Lucy Joyce](https://www.linkedin.com/in/lucy-joyce-597485166/), [Ash Shakrani](https://www.linkedin.com/in/ash-shakrani/) and [Arun Kurian](https://www.linkedin.com/in/arun-mathew-kurian-39b8aa5a/) will explore harness engineering through the lens of a payment integration. From requirements and design through to implementation, they’ll demonstrate why context alone isn’t enough for successful AI-assisted development. Drawing on real-world experience, they’ll show how engineering harnesses, reusable context, standards, and validation workflows help teams move beyond experimentation and build reliable, scalable AI-assisted development practices. **This session will unpack:** 🎯 Why “more context” isn’t the answer on its own 🎯 What engineering harnesses are and how they create reliable feedback loops 🎯 How standards, workflows, and validation reduce AI-generated rework and technical debt 🎯 Practical techniques teams can adopt immediately to improve AI outcomes 🗓️ **Save the Date:** 2nd July, 2026 📍 **Location:** Sahaj Software, 1 Quality Court, London, WC2A 1HR 🕕 **Time:** 6:00 PM – 8:00 PM (BST) The evening will feature: 🎤 **One engaging talk** with Q&A 🤝 **Plenty of time for networking** over free pizza and non-alcoholic drinks Don’t miss this chance to learn, connect, and share with fellow tech enthusiasts. 👉 Please click the link below to register. https://sahaj.ai/events/harness-engineering-in-practice-from-requirements-to-implementation/

Welcome for an evening exploring personal relationships within a safe group what happens in the room stays in the room

Hello and welcome to our special joint meetup between **Cloud Platform Engineering London**, **Cloud Platform Engineering Leaders**, **Data & AI Leaders**, **AWS AI UG**, **Azure AI UG**, and **GCP London**. This crossover event brings together platform engineers, cloud architects, data and AI leaders, SREs, engineering managers, technology executives, and practitioners exploring how AI is reshaping modern cloud platforms, developer workflows, business transformation, and enterprise engineering. This is a special **Community Stack ecosystem event**, bringing together several of our cloud, platform, and data-focused communities for an evening of practical talks, senior technical discussion, and cross-community networking. A huge thank you to **[Arrows](https://www.arrowsgroup.com/)** for hosting and sponsoring this event, and for supporting the growth of the cloud, platform engineering, data, and AI community in London. Speakers and sessions: **Get a High Return-on-Investment from AI Business Transformation** **Nora Balla, Founder and AI Business Transformation Lead, Add Velocity** Nora Balla is the founder of Add Velocity, an AI-native business transformation and implementation consultancy. Nora has gained extensive experience across investment products, business transformation, finance operations, and regulated asset and wealth management environments. Previously a freelancer, she now operates in a collaborative delivery model, helping organisations scale AI and automation solutions in complex business settings. Her experience includes finance transformation at Harley-Davidson, reporting process improvements in commercial real estate funds, and supporting the Aladdin implementation at Royal London Asset Management. In this session, Nora will explore how organisations can achieve a stronger return on investment from AI business transformation. The talk will cover the opportunities and high-value use cases, the real risks organisations need to manage, the skills required for the agentic era, how to define and measure success, and practical tips for improving efficiency when working with AI systems. **Agents in the Fastlane** **Ryan Cormack, Principal Engineer, Motorway** **Luke Marrai, Engineering Manager, Motorway** Motorway has used traditional AI and machine learning for years to enhance and improve its systems. But how can those years of learning be applied to build the next generation of agentic systems for users? In this session, Ryan Cormack and Luke Marrai from Motorway will explore how they are enhancing the functionality of Motorway’s platform to provide more accurate search results for dealers looking to acquire stock through the online marketplace. The talk will cover how Motorway is using **AWS AgentCore** to run its agentic systems, and how evals are being used to ensure the system performs as expected. Ryan Cormack is a Principal Engineer at Motorway, the UK’s leading used car marketplace, where he leads technical strategy and drives AI-powered transformation across the engineering organisation. With over 14 years of experience building and scaling systems on AWS, Ryan specialises in turning architectural best practices into practical engineering outcomes, from cloud modernisation programmes to the adoption of agentic workflows and AI-native developer tooling. Luke Marrai is an Engineering Manager at Motorway, supporting engineering delivery and helping teams build effective, scalable technology for one of the UK’s leading automotive technology platforms. Agenda: **18:00** — Arrival, refreshments and networking **18:30** — Welcome and introduction **18:35** — Get a High Return-on-Investment from AI Business Transformation — Nora Balla **19:00** — Break and networking **19:20** — Agents in the Fastlane — Ryan Cormack and Luke Marrai **20:00** — Networking **20:45** — Close **Join us on June 11th:** We are also hosting the **Cloud Native & Open Source AI Conference** on **June 11th in London**, bringing together a fantastic line-up of speakers across AI, cloud-native, open-source, platform engineering, leadership, and modern infrastructure. You can view the full speaker line-up and event details **[here](https://www.communitystack.io/conferences/cloud-native-london)** **About the communities:** This event is jointly hosted across **Cloud Platform Engineering London**, **Cloud Platform Engineering Leaders**, **Data & AI Leaders**, **AWS AI UG**, **Azure AI UG**, and **GCP London**. Together, these communities form part of the **[Community Stack ecosystem](https://www.meetup.com/pro/generative-ai-uk-community/)**, bringing together technical practitioners, leaders, partners, and organisations across cloud, platform engineering, data, AI, and open technology. We are always keen to hear from speakers, hosts, sponsors, and community partners. If you would like to speak, sponsor, or host a future event, please reach out to **[Ethan Sumner](https://www.linkedin.com/in/ethansumner404/)** via LinkedIn. This event follows the **[Community Stack Code of Conduct](https://www.communitystack.io/code-of-conduct)** and **[Privacy Policy](https://www.communitystack.io/privacy-policy)**, ensuring a respectful, inclusive, and welcoming environment for all attendees.

🌿 Hyde Park Summer Singles Picnic & Sunset Walk \| Ages 25–46 Looking to meet like-minded single professionals in a relaxed, natural setting? Skip the noisy bars and awkward speed dating. Join us for a summer evening in the heart of Hyde Park, where great conversations happen organically. We'll meet outside Serpentine Bar & Kitchen before settling on the grass for a casual picnic, followed by a scenic walk around the Serpentine as the sun begins to set. There will be a few light-hearted icebreakers to help everyone get to know one another, but the focus is simply on enjoying good company and genuine conversation. Whether you're new to London, looking to expand your social circle, or hoping to meet someone special, this is a welcoming space to connect with interesting people in a relaxed atmosphere. 📅 Date & Time Thursday 2/7/26 6:45 PM – 9:00 PM 📍 Meeting Point Outside Serpentine Bar & Kitchen, Hyde Park. Please arrive by 6:45 PM so we can begin together. 🌿 What to Expect 6:45 PM – Welcome and introductions 7:00 PM – Fun, relaxed icebreakers to help everyone mingle 7:30 PM – Picnic, conversation and socialising 8:15 PM – Sunset stroll around the Serpentine, with opportunities to chat with different people along the way 9:00 PM – Finish, with the option to exchange contact details if you make a connection Who Is This For? ✔️ Singles aged 25–46 ✔️ Professionals and like-minded individuals who enjoy meaningful conversation ✔️ People looking to meet others in a relaxed, respectful and friendly environment This is not a speed dating event. There is no pressure, no name tags and no forced matching—just an enjoyable evening meeting new people in one of London's most beautiful parks. What to Bring • A picnic blanket or something comfortable to sit on (optional) • Your own food and drinks • Comfortable shoes for the walk • A friendly attitude and an openness to meeting new people Group Values We aim to create a warm, welcoming and inclusive atmosphere where everyone feels comfortable. Please be respectful, be present, and help make new members feel included. Genuine conversations and kindness are what make these events memorable. Come on your own or with a friend—most people attend solo, and we'll make sure everyone feels welcome. We look forward to spending a wonderful summer evening with you! If the weather is unsuitable, the event may be postponed or an alternative venue will be announced via Meetup. ⚠️ Safety Disclaimer: This is a free, casual community gathering. Attendees are entirely responsible for their own personal safety, behavior, and belongings at all times. The organiser accepts no liability for any incidents, injury, or loss during the event. By attending, you confirm you are an adult (18+) and accept full personal responsibility.

We are delighted to announce that manifesto have kindly agreed to host the Umbraco London July Meetup at their offices in Whitechapel, and are very kindly providing us with food and drinks. **Please register and sign up in advance** so that we can give a list of attendees to reception and comply with their building regulations. [manifesto](https://manifesto.co.uk/) is a company that uses and champions Umbraco CMS, particularly within the context of digital transformation and sustainability, including being Certified B Corp. We are welcome from 18:30 onwards, we shall look to get started around 18:45. We'll finish by 21:00 when we take the conversations to a local pub. \-\-\-\-\-\- **\*\* AGENDA \*\*** **#1** **Welcome and Latest News** Peter Cooper from manifesto with Lotte, Ravi and Richard from Umbraco London **#2 Codegarden 2026: One Umbracian's Experience** John Seto will be sharing his highlights from Codegarden 2026 - what he learned, what inspired him, and what it means to be part of the wider Umbraco community. He'll also be talking about his experience of the Green Track, a community initiative encouraging contributors to travel to Codegarden by greener means, with free tickets awarded to those selected by Umbraco HQ. **#3** **manifesto RazorKit** by Nurhak Kaya and Pete Cooper At manifesto, we have created a new component-driven development experience specifically for [ASP.NET](http://ASP.NET) Core Razor and Umbraco applications. This approach allows us to develop, test, and document our UI components in isolation within a live application through an interactive preview environment, eliminating the need to navigate through the entire application flow. In this talk, we will provide hands-on details about this approach and discuss its benefits for both development teams and clients. \-\-\-\-\-\- If you realise you can't make it please be sure to change your RSVP to No in case there are people on the waiting list. \-\-\-\-\- If you would like to contribute to our meetups please in touch by email (hello@umblondon.co.uk) - we are always looking for people to give talks, or London-based Umbraco agencies to host us for the evening. Please read the [Code of Conduct](https://bit.ly/UmbLondonCodeOfConduct) for all our events.

Register: [https://www.eventbrite.co.uk/e/ljc-meetup-at-neo4j-smarter-search-with-spring-ai-and-neo4j-tickets-1991379537804](https://www.eventbrite.co.uk/e/ljc-meetup-at-neo4j-smarter-search-with-spring-ai-and-neo4j-tickets-1991379537804) LJC Meet-ups is a series of events, aimed at giving all Community members an opportunity to present at an LJC event. We're excited to invite you to our next Meetup, co-hosted with **neo4j**! Join the London Java Community for an evening of technical talks, networking, and knowledge sharing hosted by Neo4j. This month’s meetup explores two of the hottest areas in modern software development: integrating Generative AI into Java applications and deploying Machine Learning models within Java ecosystems. Whether you’re a Java developer, architect, data engineer, or simply curious about the latest innovations shaping our industry, this session will provide practical insights and real-world examples from experienced practitioners.

Playtesting comes to Bay Games, Whitley Bay's game cafe. A full afternoon of demoing, with Playtest UK volunteers on hand to connect gamers with games. Bay Games has been supporting game designers since first opening its doors, and we're thrilled be joining them for this event. This page is intended for designers to register interest. If you are interested in demoing - and you have not already messaged me - please comment here BEFORE Monday 29th June. You can bring as many different prototypes as you want but the event is not intended for promotion - any posters, flyers etc must be no larger than A4 size. Any questions feel free to comment!

We playtest all sorts of tabletop games - strategic, silly, creative, or whatever (but not video games). Some games are almost done. Some are very early ideas. We test anything that will fit into 90 minutes. You don't need to bring a game - we always love to have new playtesters! Please let us know in the comments when you plan to arrive/leave and whether you are bringing a game or not. This helps us to plan the day better. The schedule is: 10am onwards - gathering, chatting 11am sharp - playing for 90 min ('slot 1') 12:30ish - break for food/chat 1pm sharp - playing for 90 min ('slot 2') 2:30ish - break for food/chat 3pm sharp - playing for 90 min ('slot 3') 4:30ish - finish up Often, we might hang around afterwards, to play some already-published games. We are strict on timings, so please try to arrive a few minutes before the session to limit disruption. You can just come for part of the day if you wish. The reason we have fixed timings for the 3 'slots' is to make it easier for folk to do so. Designers of all levels of experience are welcome! But if it's your first time, we ask that you don't bring a game and just spend some time learning how the group works. The group works based on reciprocation. If you expect to test your own game, make sure stay for long enough to play other games. As a general rule of thumb, you can expect to play one of your own games every third 90-minute session. So if you stay a whole day (3 sessions), you can expect to have one session to play your game(s). A good rule of thumb is that if you come all day, you will have one 90 minute session with two other playtesters in which to test your own games. It is sometimes possible to test games with more players. If your game requires 4 or more, please note that as standard you will be allocated half of a session (45 minutes). Pre-covid, we were getting unmanageable. As a result, we may have to limit attendees. This is a free-to-use venue, and we have to be mindful that other folk want to use the same space. Please note: This is an adults only event. We look forward to seeing you!

**🎭 Friendly Group Improv in Clerkenwell, London 🎭** Come and join a relaxed, playful **group improvisation session** in the heart of London! We’ll dive into **theatre games**, **acting warm-ups**, and **icebreakers**, followed by short, light-hearted scenes — spontaneous fun! 💥 🎯 **Our aims**: * Build **self-confidence** in social settings * Make **new connections** 👋 * Push your **comfort zone** 💪 * Explore **self-expression** 🎨 * Release **social inhibitions** * Sharpen **communication skills** 🗣️ All through **fun, interactive, and communal play!** 🧩 Whether you're looking to **laugh**, **connect**, or **unleash your creativity & inner child**, you’re welcome here! 😄✨ **Pay on Eventbrite here:** [Improv-eventbrite](https://www.eventbrite.co.uk/e/improv-for-well-being-confidence-and-fun-tickets-1982624895433?aff=oddtdtcreator) \*with discount code JU6F for the amount of £12.65 **or in-person when you arrive.** 🍽️ **Stick around after?** Feel free to join us for a **drink or dinner** afterwards — we do this occasionally depending on end time and interest 🥂🍕 *** 📍 **Location:** Peel Institute Three Corners Centre, Northampton Rd EC1R www.thepeel.org \* This venue is wheelchair accessible 🚪 **Finding the Peel:** The Peel is situated on the corner of Northampton Road and Corporation Row. Please note; Northampton Road is a sort of U shape so if you find yourself at the other end of the U, and are confused you probably need to walk to the other end - just a few mins. 🚇 **Tube:** Farringdon or Angel *** 💷 **Payment:** **£12.65 pay when you arrive and RSVP now.** Pay by **Card**, **Cash**, or **Contactless** on arrival. Or via eventbrite [here](https://www.eventbrite.co.uk/e/improv-for-well-being-confidence-and-fun-tickets-1982624895433?aff=oddtdtcreator) 📞 If you get lost, call **07841 456974** – but note: my phone will be **off once the session starts**, so try to arrive **on time or a little early!** ✅ **Please RSVP** — or you may be refused entry, thanks! 👕 **What to wear:** Anything you like! There’ll be some movement, so **looser/comfy clothing** is ideal — but there’s **no dress code**. *** 🕗 **Schedule (approx.):** 🕣 19:00 – 19:15 \| Arrivals & Payments 🔥 19:15 – 20:00 \| Warm\-ups & Games 🧘 20:00 – 20:05 \| Short Comfort Break \(if needed\) 🎬 20:05 – 21:00 \| Scene Games\! I’ll arrive after **18:40** – please aim to be on time for **19:00**, thank you! *** 📢 This group is also listed on **Eventbrite** – so we’ll have friendly faces from there too! 😊

Meet up fee £7 to be paid at the beginning of the meet up. Cash or card payments. @Alfies Antique Market. Alfayez entrance, ground floor, ROOM B04. Please bring your favourite Tarot deck.

A focused Unreal Engine coworking meetup for developers, designers, and artists to build projects, solve problems, share feedback, and collaborate in person — no talks or panels, just real hands-on game development.

Pitch.london is a curated speed-networking event for founders, operators and serious builders. Short, structured conversations. Sharp prompts. Real chemistry, fast. The hardest problem in early-stage entrepreneurship is finding the right people. Most events leave it to chance. We don’t. The room is curated, the prompts are clear, and the format is built for high-signal encounters between people who are actually building something. In one evening, you can meet more relevant people than you might in months of random networking. Two formats. One room. Zero fluff. **01\. Founder matchmaking pitches** Sixty seconds to share who you are, what you’re building, and what would actually help right now. Whatever you’re looking for, the room is built to help you find it: people to build with, people to hire or be hired by, advisors and investors, or honest feedback on what you’re shipping. **02\. Group brainstorms** Small, time-boxed groups tackle a real challenge brought into the room. Bring a live problem you’re stuck on. Get five minds on it for ten minutes. Leave with new angles and next steps. **This room is for you if you’re:** * A founder seeking a co-founder * A founder seeking a first hire * An operator looking for a serious team to join * A technical builder open to commercial partners * A commercial builder open to technical partners * A second-time founder scoping the next thing * An angel investor close to the early-stage scene It’s probably not for you if you’re hunting for clients, selling services, or still working out what you’re looking for. **Run of show** * 17:30 to 18:00 Doors, drinks, soft start * 18:00 to 18:05 Welcome and the rules of the room * 18:05 to 18:35 Speed pitches: Round 1 * 18:35 to 19:15 Group brainstorms * 19:15 to 19:45 Speed pitches: Round 2 * 19:45 to 20:00 Open networking, then drinks at the citizenM Skybar **What’s included** Your £25 covers your seat in the room and a drink at the citizenM Skybar after the programme. **First 30 in get a seat**

**We will be at The Mitre pub in central Greenwich.** This meetup is free and casual. We just sit around for a few hours and write together. Bring a laptop, or use a pen and paper or clay tablet and stylus if that's what works for you. The structure of the session is roughly: 2pm: chat 2:20–3:25: writing time 3:25: chat/coffee break 3:40–4:45 writing time 4:45: chat But our Saturdays are very casual, so feel free to drop in and out. **This is usually in the meeting room at the Mitre. If you arrive a bit later, you may need to ask the bar staff to show you through to the room.**

NFT's are here to stay folks! This is a group for like minded people interested in understanding, leveraging, using, creating for, profiting from, trading too i suppose, NFT's.. everything around them, complexity, fear and exploits, best practices and more. **PLUS** This group will talk AI ART tools, techniques, artists, video, audio, prototypes and more in the AI assisted production space- ART specifically, but we can get into any aspect of some of the cooler things happening in AI in general.

You can sleep in on the Sesquicentennial (observed), we’re shifting to the following Friday. But join the local UX community for a chat and some biscuits to catch up. If you were in CA for Figma Config, tell us all the lines and you can tell me how I can animate an SVG without coding it by hand, and why I’d even want to. Thanks to the team at Nationwide of supporting the group.

Whether you've never done improv before, or you've done it for so long you were quoted in *Truth in Comedy*, or anywhere in between, come join us! Swing by *Gresso's* for the **Columbus Improv Comedy Meetup**! The idea behind improvised comedy is to create entire scenes from scratch. A suggestion is taken from the audience and laughter is built on the spot. This can be done in game form, like *Whose Line Is It Anyway, Make Some Noise,* or *Wild 'n Out*; it can also be done in a longer way, to tell a complicated story, like *TJ & Dave*. Our meetup, which is central Ohio's longest running (and FREE!) weekly comedy event, brings the games for you to play in a safe, supportive, and compassionate environment. Afterward, many members will hang out in *Gresso's* itself and get to know each other. Not only is this a lot of fun, but you get to work on thinking faster on your feet, your public speaking, plus it's an excellent way to meet new people and build relationships that will last a lifetime, and you do that while laughing your butt off! Ask yourself if you want to join the **Columbus Improv Comedy Meetup**, and say "*Yes, And*" that you'll have a blast!

Most people use LLMs by feel: ask a question, read the answer, decide whether it “seems good,” and move on. That works for casual use. It does not work when you are building software, automating workflows, writing important documents, or relying on AI for anything that needs to be repeatable. In this talk, we’ll look at how to improve and evaluate the inputs and outputs of LLMs using practical measurement techniques. We’ll cover how prompt changes affect results, how to compare outputs, how to build simple evaluation sets, and how math-based methods like similarity scoring can help you move beyond guesswork. This will be beginner-friendly, so even if you don't know anything about AI, you should get something out of it. However, this will be a little more technical than our intro talks. You do not need to be an AI researcher, but programmers and technically curious attendees will get a lot out of it. We’ll cover: * Why “it looks good” is not enough * How to improve prompts by changing the input, context, and constraints * How to compare LLM outputs more systematically * Basic evaluation techniques for accuracy, consistency, and usefulness * How embeddings, cosine similarity, and scoring can help evaluate results * Where automated evaluation works — and where humans still need to stay in the loop By the end, you’ll have a practical mental model for treating LLMs less like magic and more like systems you can test, measure, and improve. LOGISTICS AND PARKING: The talk starts at 7:00 PM. The first half hour is reserved for everyone to get set up and mingle. Free pizza and drinks! The cheapest parking option is to find street parking, which will only cost you a few bucks. Otherwise, park in the nearby veteran's museum lot for $8. It's highly recommended you avoid the nearby $15 garage parking.

Come attend a free in-person seminar where you will find out why you: -Feel isolated -Can't express yourself openly -Get nervous or anxious in front of people -Run out of things to say or feel tongue-tied -Feel introverted -Don't feel comfortable in any social setting -Can't make more friends -Are shy and miss opportunities to connect in a meaningful way And we cover what you can do about any one, some or all of the above. This seminar is the weapon against loneliness, isolation and boredom, come join us! COME TO THIS SEMINAR AND LEARN THE SECRETS TODAY This seminar is brought to you by the Dianetics & Scientology Life Improvement Center. 1266 Dublin Road, Columbus, Ohio 43215

Bring your Raspberry Pi, Arduino, microcontroller, or any other electronic project and join fellow electronics makers for a night of creativity and collaboration! This session is open forum to share your current projects—whether complete or in progress, it’s all interesting! Whether you’re deep into embedded systems, exploring new ideas, or just getting started, you’ll find a welcoming space to collaborate, share, and get inspired. **New to electronics or curious about tinkering?** You’re absolutely welcome. If you’re a beginner and want to experiment, I’ll have a couple of starter kits available so you can try things out—whether that’s blinking your first LED, putting something on a display, or experimenting with simple sensors. No pressure and no experience required—just an interest in learning and building. While we continue to pursue a more permanent venue for this Meetup, we’ll be using public library facilities based on availability.

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!