Software Modeling

Vibe Coding Collective is a global community helping anyone turn ideas into working software with AI. We host relaxed social coding jams in bars, cafés, and maker spaces. Whether you're a developer or have never written a line of code, you'll fit right in! ​On June 23, we're teaming up with [Momen](https://momen.app/?utm_source=luma) for a special edition about building full-stack with vibes. It is the visual backend, that seamlessly turns front-end "vibes" from tools like Cursor or Lovable into scalable databases, AI workflows, and secure, production-ready architectures. ## ​Format 🛠️ ​We team up in small groups of 3-4. ​You'll start by designing and laying out your app by hand, dragging and dropping the screens, deciding how it should look and feel. Then you go from there to vibe-coded backends, including databases, workflows, AI agents, and logins. By the end you've gone from a blank canvas to a real, working app with a brain behind it. ​The goal is to vibe, and learn from each other. ## ​New to vibe coding? ✨ ​No worries. We provide simple starter ideas and example prompts so even total beginners can dive straight in without stress. ## ​Schedule 🕒 ​19:00 — Welcome 19:05 — Intro from the Momen team 19:15 — Live workshop: Building a challenge app with Momen 19:45 — Challenge briefing & team formation 20:00 — Build time 21:00 — Optional demos (show what you made!) 21:30 — Hang out, network, make friends ## ​Who is it for? ​Anyone! Curious coders, tinkerers, designers, founders, AI-curious folks, and developers. If you've ever wanted to take an idea all the way to a real, full-stack app without writing code, you belong here. ## ​What to bring ​- Laptop 💻 \- Vibes ⚡ ## ​Location 📍 ​Brewhouse and Kitchen Highbury 2A Corsica St, N5 1JJ, London ## ​About Vibe Coding Collective ​We're an international community of 3,500+ members across 9 countries, running relaxed social coding jams where everyone leaves with something they built. ​🌟 No pressure, no gatekeeping. Just good people, fun ideas, and some fast-paced collaborative building. ​Spots are limited and our events fill up fast, so RSVP early! ​#AI #vibecoding #AItech #LondonAI #social #fun #socialdrinking

Hey everyone, We’re back with a new edition of the AI Security Engineers Meetup in London on June 23rd with 2 great talks! **Talk #1 - Architecting Safe Autonomy: High-Stakes Autonomous Agents Need Deterministic Checkpoints for safety** In the rush to build autonomous agents, we face a fundamental tension: the more freedom we give an LLM to solve complex problems, the more likely it is to drift into “stochastic hallucinations” or policy violations. Most safety efforts focus on restricting the model via prompts, which often stifles the very reasoning capabilities required for sophisticated tasks. This talk introduces InsideOut, a design pattern that prioritizes agent autonomy by implementing deterministic checkpoints. Rather than micro-managing the agent’s “thoughts,” the InsideOut architecture allows the agent to navigate freely through a task—provided it periodically “grounds” its progress in structured, verifiable artifacts such as JSON or Markdown. We will walk through a real-world application of this method: an agent designed for setting up and managing cloud infrastructure. The agent is given the autonomy to discuss and decide on Features, Stack Components, Configurations, Cost Estimates, Terraforms, Deployment, and Management. To ensure reliability, each stage requires the generation of a JSON artifact validated against deterministic rules. If a boundary is breached, the agent is triggered to repeat that specific stage until the output is within bounds, preventing error propagation. By drawing a parallel to the concept of a Brownian Bridge versus Brownian Motion, we illustrate how these checkpoints act as “pins” that anchor a random walk. This approach demonstrates how forced artifact crystallization allows an agent to design and deploy complex stacks with high independence and zero “drift.” This session provides a framework for building agents that are more productive because they are safely unconstrained. Speaker: Hossein Kakavand. Hossein did his Ph.D. at Stanford University. He has been with several start up in AI, ML and Distributed Systems, with IPOs on NASDAQ and LSE. He is currently a Co-Founder of Luther Systems focused on solving the Enterprise Operations problem at scale. **Talk #2: Agentic Development Security: Securing the AI Workforce** AI agents are rapidly becoming part of the software development lifecycle, writing code, interacting with tools, and making decisions with increasing autonomy. But as organizations embrace agentic development, a new set of security challenges emerges: How do you trust the tools agents use? How do you prevent dangerous actions? And how do you ensure the code they generate is secure? In this session, we'll unveil and demo Snyk Agentic Development Security, a new approach to securing both AI builders and the AI-powered tools they rely on. You'll see how organizations can secure the agent supply chain by vetting MCP servers, plugins, and external tools before agents interact with them; govern agent behavior through real-time policies that prevent destructive actions with Agent Guard; and ensure trusted output by automatically detecting and fixing vulnerabilities in AI-generated code at the moment of creation. Join us for a live demonstration of how security can keep pace with the rise of autonomous development, enabling teams to innovate confidently while maintaining control, trust, and resilience across their AI workforce. Speaker; Denis Kent - AI Security Engineer at Snyk. Denis is an AI Security Software Engineer at Snyk, building Evo, Snyk's agentic security platform. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- As always, expect great talks, free pizza and drinks, and even better company. 📍 **Where**: Snyk Offices, 24 Eversholt Street, London (Euston tube station is right across the street) 📅 **When**: June 23rd ## Agenda **6:00 PM** – Doors open **6:00 PM – 6:30 PM** – Food & drinks **6:30 PM** – Talks begin **7:30 PM** – Talks end & social time **8:30 PM** – Doors close Looking forward to seeing you there!

**Please note this is an online event. If you want to attend in person, please RSVP to our [In-Person Event.](https://www.meetup.com/producttank-london/events/315211795/?utm_medium=referral&utm_campaign=share-btn_savedevents_share_modal&utm_source=link&utm_version=v2&member_id=347816072)** **\-\-\-\-\-\-\-** The "Product Manager" has never fit one mould, and AI is pulling the seams apart faster than ever. The consulting PM with the polished decks, the big tech PM optimising a metric three layers deep, the engineer-turned-PM still half in the codebase—these archetypes shape how we hire, coach, and judge PMs, but they were always more caricature than craft. This month we put them on the table and ask what's still true. Our speakers share their own journeys and talk candidly about how the role is shifting as AI moves from a roadmap item to a collaborator in the work itself. Expect honest stories over tidy frameworks, and a real look at how the role mutates depending on where you sit. **Our speakers:** [Kiran Virdee](https://www.linkedin.com/in/kvirdee/) \- Head of Product @ Accenture UK [Stephen Down](https://www.linkedin.com/in/stephen-down-3b824146/) \- Senior Product Manager @ Channel 4 [Valeria Stromtsova](https://www.linkedin.com/in/lerastromtsova/) \- Product Owner @ myenergi As always we will close our meet-up with a candid discussion and Q&A. This event is sponsored by Accenture UK. **Location:** Link to be shared soon **Timings:** 7:00 - Talk starts / streaming starts 8:00 - Q&A 8:30 - Q&A Finish 9:00 - Close Please note that the event will also be live-streamed on our YouTube channel and images will be taken throughout the evening. To keep up-to-date with our upcoming talks, follow our [LinkedIn page](https://www.linkedin.com/company/producttanklondon) and our [YouTube channel.](https://www.youtube.com/c/MindtheProductTV) \-\-\-\-\-\-\-\-

**Please note this is an offline event with limited space. RSVP only if you will be able to attend in person. If you want to watch the live streaming, please RSVP to our [Online Event](https://www.meetup.com/producttank-london/events/315231290/?utm_medium=referral&utm_campaign=share-btn_savedevents_share_modal&utm_source=link&utm_version=v2&member_id=347816072)**. **Also, this event will not include catered food.** **\-\-\-\-\-\-\-** The "Product Manager" has never fit one mould, and AI is pulling the seams apart faster than ever. The consulting PM with the polished decks, the big tech PM optimising a metric three layers deep, the engineer-turned-PM still half in the codebase—these archetypes shape how we hire, coach, and judge PMs, but they were always more caricature than craft. This month we put them on the table and ask what's still true. Our speakers share their own journeys and talk candidly about how the role is shifting as AI moves from a roadmap item to a collaborator in the work itself. Expect honest stories over tidy frameworks, and a real look at how the role mutates depending on where you sit. **Our speakers:** [Kiran Virdee](https://www.linkedin.com/in/kvirdee/) \- Head of Product @ Accenture UK [Stephen Down](https://www.linkedin.com/in/stephen-down-3b824146/) \- Senior Product Manager @ Channel 4 [Valeria Stromtsova](https://www.linkedin.com/in/lerastromtsova/) \- Product Owner @ myenergi As always we will close our meet-up with a candid discussion and Q&A. This event is sponsored by Accenture UK. **Location:** Accenture, 30 Fenchurch St, London EC3M 3BD, UK Wembley Meeting Hall, 5/F **Timings:** 6:30 - Doors open 7:00 - Talk starts / streaming starts 8:00 - Q&A 8:30 - Q&A Finish 9:00 - Close Please note that the event will also be live-streamed on our YouTube channel and images will be taken throughout the evening. To keep up-to-date with our upcoming talks, follow our [LinkedIn page](https://www.linkedin.com/company/producttanklondon) and our [YouTube channel.](https://www.youtube.com/c/MindtheProductTV) \-\-\-\-\-\-\-\- By attending this event, you agree to give permission for any photos taken during the event to be used for promotional purposes, give permission for your name and surname to be used for registration purposes, and agree to be contacted by email by ProductTank.

On 23 June we will be gathering at the Star of Kings for some Postgres and a pint. This time we'll have a talk by **Andreas Karlsson** from Percona on **Stopping Collations Going Wrong**, followed by a brief recap from **Alastair Turner** (Percona) and **Valeria Kaplan** (Data Egret) on **this year's PGConf.DEV**, where the PostgreSQL community celebrated its 30th birthday. This event is generously sponsored by [Nexteam](https://nexteam.co.uk/), a London-based consultancy specialising in PostgreSQL-based solutions, database support, and bespoke software development. We are a very informal bunch, so hoping to see you and your colleagues there! We do need to know the numbers, so please register if you are planning on coming. WHERE The Star of Kings **on 23, June from 18:30.** PROGRAMME 18:30 Welcome 19:00 **Stopping Collations Going Wrong** (Andreas Karlsson, Percona) - More below! 19:45 Food and bar snacks 20:00 **Celebrating 30 Years of Postgres at PGConf.DEV** (Alastair Turner, Percona & Valeria Kaplan, Data Egret) 20:30 It's a pub, so we'll stay and hang out a bit longer — but feel free to leave whenever you prefer! About The Talk **Stopping Collations Going Wrong** Outside of causing trouble for you when upgrading libc what are collations good for? PostgreSQL's collations have gotten a lot of bad press from the upgrade issues but they are also a powerful and important tool, especially for working with text in other languages than English. This talk will give an introduction to collations in PostgreSQL, including how to use them, what they are useful for, how they work plus some common pitfalls and misunderstandings. You will learn, among other things, about the three collation providers (libc, icu, builtin), BCP 47, case insensitive collations, CTYPEs, what new features have been introduced in recent PostgreSQL versions and get a brief look into the future of collations in PostgreSQL. About The Speaker **Andreas Karlsson** is application developer and long time minor contributor to PostgreSQL who recently has started working with PostgreSQL full time. Right now working for Percona with PostgreSQL itself and extensions, including pg_tde. \*\*\* THE OFFICIAL BITS The meet-up abides by [PostgreSQL Code of Conduct](https://www.postgresql.org/about/policies/coc/). Postgres, PostgreSQL and the Slonik Logo are trademarks or [registered trademarks of the PostgreSQL Community Association of Canada](https://www.postgresql.org/about/policies/trademarks/), and used with their permission.

**Join us on June 23rd for the Stripe London developer meetup. This is an in-person event for anyone building with Stripe. An evening focused on Stripe user experiences, product insights, best practices, and community.** 🍕🍺 **Perks** Food, drink provided! **🎫 Tickets** There is a hard limit for RSVP :) Wait list will be operating on Meetup. **📍Location** The event is hosted at Stripe's London offices near Liverpool St station. **🕚 Rough timings** * 6:00 pm - 6:30 pm: Doors open with refreshments * 6:30 pm - 7:45 pm: Talks and Q&A * 7:45 pm - 8:00 pm: Drinks, food, and networking **📣 Talks** 1. **Enabling Crypto in Stripe - from pay-ins to pay-outs,** Ana Andres del Valle 2. **What developers need to know about payments** \- Allison Farris\, Developer Advocate at Stripe Don't miss this opportunity to connect with the Stripe community. **You must bring a government issued photo ID.** [Stripe developer code of conduct.](https://stripe.com/legal/developer-code-of-conduct)g

\> This group has a new home\. \[Luma → [https://luma.com/ldn_software_guild](https://luma.com/ldn_software_guild)]([https://luma.com/ldn_software_guild](https://luma.com/ldn_software_guild) ) **About the London Software Guild** ​The London Software Guild gathers developers, architects, and teams across London who care deeply about the craft of building great software. No fluff, no vendor pitches — just people who take the work seriously, sharing what they've learned the hard way. *** ## ​**Talk:** Dimming the Lights ​**Abstract:** Lessons from the front lines of transforming our enterprise SDLC into a dark factory. We'll talk about quick wins, surprising sticking points, the unsolved problems of orchestration and validation, and controlled experiments and challenges that you can try with your team. ## ​**🎤 Speaker:** Macey Baker, Community Engineer at @Tessl ​**Bio:** As Tessl's Founding Community Engineer, Macey Baker is busy helping to build the future of AI-native development (and helping you build it too). Now an AI code generation obsessive, she got her start as an early employee at tech unicorn Intercom in San Francisco, before jumping the pond and roaming the London startup scene, working primarily in big data / ML houses. Some of her best friends are LLMs. *** ## ​Talk: Secrets in Plain Sight ​**Abstract**: Your AI assistant needs to understand your code, but your model provider doesn't need to know your credentials. We'll explore a novel guardrail architecture that lets models reason about sensitive data they never actually see — preserving full performance without the leak. We'll cover the design philosophy, the tradeoffs, and why context-aware approaches outperform blanket redaction. ## ​**🎤** Speaker: Daniel Trugman, Co-founder and CTO at Requesty ​Requesty is building a novel AI Gateway that provides a complete control plane for any AI use case. The team at Requesty is building innovative solutions that solve the problems of tomorrow for AI trailblazers.

AI agents are getting better at writing software. That doesn’t mean the software is getting better. As AI systems become more autonomous, engineering teams face a different set of problems: unreliable outputs, untestable workflows, evaluation bottlenecks, and legacy systems that weren’t designed for any of this. At this Future Form session, we’re looking at what happens when agentic systems collide with production engineering reality. **Speakers:** **Ning Lu, VP, Aladdin Financial Engineering, BlackRock** Ning explores the evolving landscape of LLM evaluation. From static benchmarks to LLM-as-judge systems and agent trajectory review, he’ll break down how engineering teams can evaluate systems that don’t behave deterministically. **Katie Roberts, Technical Director & AI Native Specialist, Nearform** Katie will show how AI-native engineering can be applied inside mature brownfield systems. Using patterns like the Strangler Fig approach, she’ll explore how to isolate risk, generate tests for undocumented code, and evolve legacy architectures without full rewrites. If you’re working with AI agents, legacy systems, or production engineering workflows, this session is for you. Pizza, drinks, and practical AI insights included.

Join us on June 24th for Microsoft post build in London. Sign up here https://msevents.microsoft.com/event?id=991181493

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:** 25th June, 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/

This June we're at FundApps offices in HYLO, Bunhill Row. Chris Simon's back in town, and will be joining us to talk about streams and queues; plus Tiago Sousa from SteelEye will be talking about the work they're doing around using AI in comms surveillance. Our hosts at FundApps will be providing drinks and snacks, and there will be plenty of time to chat beforehand and in the pub afterwards. **Chris Simon: It's like 10,000 streams when what you need is a queue** *🎶🎵 A new dev team adopted E-D-A* *Got head of line blocking, on their very first day* *Isn't it ironic, don't you think 🎶🎵* The last few years have seen widespread adoption of Event-Driven Architecture, supported by DDD practices such as event storming. But what does that orange sticky note become when we start implementing our design? Common implementation choices include event sourcing, streaming platforms like Kafka and queuing systems like RabbitMQ. Unfortunately not every orange sticky note has the same operational needs, and many teams remain confused about the differences between these options, resulting in the selection of the wrong paradigm for their needs. This can lead to unnecessary complexity & operational challenges such as head of line blocking, dropped messages, challenges dealing with failed messages, difficulty with adaptive scaling and inadvertently increasing coupling between services. In this talk we'll bring that orange sticky note into the runtime of our system. We’ll start with a deep dive into the similarities and differences between event streaming platforms such as Kafka and queueing systems such as RabbitMq, Azure Service Bus & AWS SNS/SQS. We’ll then look at ways to assess your orange sticky notes to work out which messaging and persistence paradigms suit each one, helping you build more resilient, scalable and loosely coupled event-driven architectures. **Tiago Sousa: AI in Comms Surveillance** In this talk, Tiago shares what it's actually like to build AI for communications surveillance at SteelEye. Financial firms are required to monitor and flag communications for compliance, but making AI work reliably in that context is harder than it sounds. He'll walk through real examples from the trenches: what worked, what didn't, and what he'd do differently. **Tiago Sousa** is a Staff Data Engineer and AI Lead at SteelEye - a platform that helps financial firms monitor and flag communications and trades to stay compliant with regulations. He's spent the last five years building the data and AI systems that make that work. Before that, he did research in bioinformatics, which means he came into fintech from an unusual angle and has the scars to prove it. He's based in Braga, Portugal.

**Hello There! And welcome to our June Gophers @ Meta event!** It's immensely exciting that we'll be visiting Meta for our June event, but with great big office comes great responsibility, so it is **CRITICAL THAT YOU HEED THESE ENTRY REQUIREMENTS!** * You MUST bring Government Issued Photo ID with you, matching the name with which you sign up to this event * You MUST complete the NDA that will be emailed to you in advance of the event, before arrival * You MUST be over 18 years old * You MUST NOT record when inside the venue * You MUST wear the lanyard provided to you on the night at all times And needless to say, if you satisfy all of those criteria and manage to make it through security without being tackled, you MUST have a lovely time otherwise you know I'll be giving you a hard stare. A massive thank you to Meta for hosting! See you all there! ==== 📓 **Agenda**📓 ===== (Certain timings and orders may be subject to change) **5:30pm onwards:** Sign-In, Food & Refreshments **6:55pm:** Introduction **7:00pm:** 🗣️ **Jon Bodner: Testing Go: From the Basics to synctest** Testing is fundamental to software engineering and as a language focused on software engineering, Go includes a wide variety of tools to ensure your code is working as expected. I’ll walk through the basics of testing in Go, and then cover some of the more advanced tools: benchmarking, fuzzing, and the new synctest package. **7:40pm:** Raffle and Break **8:10pm: 🗣️** **Simon Emms: Failure Happens. Your Code Shouldn't Care** As Gophers, we expect our code to be retried, restarted and run more than once. The challenge is making that safe and maintainable without layers of defensive plumbing. Temporal lets us write reliable workflows in Go that automatically recover from crashes and restarts, while still looking and feeling like normal Go code. In this talk, I’ll explain how it works and prove it with a live demo that treats failure as just another code path. **8:40pm:** Raffle Winners! **9:00pm:** Pub! ==== 🎉 **Prizes & Discounts!** 🎉 ===== **JetBrains Raffle!** \- We have 3 free JetBrains Product licenses to give away to some of our lucky attendees\! **Ardan Labs Raffle!** \- We're giving away one course license for Ardan Labs' Ultimate Go Bundle\! **Manning Publications Raffle!** \- We're giving away 4 free Go e\-books\! **45% Manning Publications Discount** \- a massive discount provided by the fine people at Manning\! You can also support London Gophers Events by purchasing via our affiliate link [HERE](https://mng.bz/oKqM) \- Use Code "**LGMeetup45**" for 45% off! **GopherConUK Raffle!** \- We're giving away one free ticket\!\!\! **10% GopherConUK Discount** \- The lovely people over at GopherConUK have provided a discount code for [GopherConUK 2026](https://www.gophercon.co.uk/tickets)! At checkout, use code "**GCUK26LGM"** for 10% off! ==== 💡 **Priority Queue** 💡 ===== We reserve 20% of the attendee spots at our events for those who are underrepresented in tech. If they join the waitlist and there is a reserved spot open they will be bumped into going! These spots are reserved until the last Sunday before the event. How do we define underrepresented? We use public surveys done by the tech community such as the ones linked below. https://survey.stackoverflow.co/2022/#section-demographics https://www.jetbrains.com/lp/devecosystem-2022/#gender-and-development ==== [📢](https://emojipedia.org/loudspeaker/) **Become a Speaker!** [📢](https://emojipedia.org/loudspeaker/) ===== Have something to say? We want to listen! We are always looking for new speakers who want to share their adventures with Go and have mentors who can help. You can sign up to be a speaker here: https://gophers.london/apply ==== 🧳**Looking For a New Adventure?** 🧳 ===== On the Gophers Slack (https://gophers.slack.com) there is a **#london-jobs** channel where company and recruiters can post job opportunities. ==== [📞](https://emojipedia.org/telephone-receiver/) **How To Reach Us** [📞](https://emojipedia.org/telephone-receiver/) ===== **Email:** contact@gophers.london **Linkedin:** https://www.linkedin.com/company/london-gophers/ **Twitter / X:** https://x.com/LondonGophers **YouTube:** https://www.youtube.com/c/LondonGophers 📜 **All London Gophers events operate under the Go Community Code of Conduct** \- https://golang\.org/conduct * **Treat everyone with respect and kindness.** * **Be thoughtful in how you communicate.** * **Don’t be destructive or inflammatory.** **Please do not message members without their consent** If you encounter an issue, please mail contact@gophers.london or conduct@golang.org

**Please register on [Eventbrite](https://www.eventbrite.co.uk/e/ljc-meetup-at-capital-one-tickets-1990857451229) to join this event.** LJC Meet-ups is a series of events, aimed at giving all Community members an opportunity to present at an LJC event. Join us on 25th June 2026 for a London Java Community meetup hosted at Capital One. **Speakers:** **Melinda Seckington** \- Leadership & Speaker Coach **Topic:** *See It, Say It, Sort It: How To Be More Proactive* It's really easy to fall into a reactive rhythm as an engineer. A ticket comes in. You pick it up. Someone else makes a decision. You adjust. Before you know it, you've spent weeks doing good work… but not necessarily shaping what that work is. The engineers who have the biggest impact aren't the ones who simply deliver. They're the ones who pay attention, spot opportunities early, and take action without waiting to be asked. Proactiveness is a skill, a mindset, and a practice. And it can be learned. In this talk, we'll look at a framework for proactiveness: Awareness + Intent + Action. We'll explore how you can increase your awareness of what's happening around you, clarify the impact you want to have, and recognise the blockers that stop you from taking the next step. **Speaker bio:** Melinda is a trainer and coach, working with engineering teams and leaders to improve their communication, management and collaboration skills. She previously was an engineering manager at companies such as the Wikimedia Foundation and FutureLearn, where she focused on creating great internal engineering cultures. She’s an international conference speaker and has spoken at over 50 conferences, covering topics from good management practices to becoming a better speaker. **Stephen Galbraith** \- Staff Engineer at Capital One **Topic:** From Fleeticide To Recovery: When Your Auto-Scaling Policy Becomes Your Worst Enemy Horizontal scaling sounds simple in a README, but the reality of a Spring Boot fleet on ECS can quickly turn into "Fleeticide.” We've all seen it: connection pools saturate, health checks flap, and suddenly your auto-scaling policy becomes an auto-failing policy. In this session, we go behind the scenes of a real-world challenge caused by lack of scaling. We'll dissect our initial assumptions and dive into the technical shifts that dramatically reduced downtime. We will move beyond "CPU/Memory 101" to look at: The Observability Gap: Tracking the "hidden" metrics (Thread pools, DB connections) that reveals how much headroom a service has. AWS Patterns for the Real World: Moving beyond basic CloudWatch alarms to custom metrics and predictive scaling that respects Spring Boot's startup overhead. Architecting for Elasticity: How to bake scaling-awareness into the developer workflow to prevent connection storms and cascading failures. **Speaker Bio:** Stephen Galbraith, Staff Engineer at CapitalOne. Steve has been at Capital One for 11 years and has used Java since the Java 1 days. He has worked on software for Computation Fluid Dynamics, Space Mission Analysis Software and Foreign Exchange Trading before moving into his current role at Capital One. Currently, Steve focuses on Site Reliability Engineering, specifically analysing software failures and developing preemptive solutions to increase service availability for Capital One's customers, aiming for the magical triple nine target. Huge thanks to our friends at **Capital One** for sponsoring this event and supporting our Community.