Community Service London
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Tuesday Hot Choc Mob
Tue, Jun 30, 6:00 PMJoin Us for a Hot Choc Mob Evening! We’ll be hitting the streets of London with something simple but powerful: warm drinks, snacks, and human connection. The Hot Choc Mob is a group of volunteers who believe a small act of kindness can mean a lot to someone sleeping rough or living through a tough time. We’re not a charity or religious group—just people who care and want to make a difference in our city. You don’t need any experience to join us. You’ll be welcomed by our walk leader and introduced to the group. From there, we’ll spend about an hour sharing hot chocolate, food, clothing, and friendly conversation with people who need it most. Afterwards, if you’d like to stay, we’ll regroup at a local pub to share stories and get to know each other. Items to bring along that are highly appreciated include bottled water or juice, soft fruit, tinned sardines, new socks, boxer shorts and t-shirts. And if you have a flask for hot water - instant coffee, tea bags, instant hot chocolate, sugar and milk enable us to make hot drinks for those we meet. If you can’t attend but still want to support us, we also have an [Amazon Wishlist](https://www.amazon.co.uk/hz/wishlist/ls/3T0FPY3DHUG9A?type=wishlist&filter=all&sort=priority&viewType=list) for essential items. This is your chance to make a real impact in someone’s day while meeting like-minded people who care about community and connection. Spaces are limited, so click RSVP now and join us for an evening that truly matters. Questions? Message Lynn on 07970 983340 Follow us on [Instagram](https://www.instagram.com/hotchocmob/)
Introvert friendly volunteering walk through LDN listening, helping homeless
Wed, Jul 8, 5:30 PM
AWS User Group UK Meetup #78
Wed, Jul 15, 5:00 PMWelcome to our July event. We're delighted to welcome [Guilherme Dalla Rosa](https://www.linkedin.com/in/guidr/), CTO, MerCloud and [Matt Johnson](https://www.linkedin.com/in/mattjohnsonuk/), Principal Technologist, MongoDB Here's what they're bringing: Serverless makes scaling easy. Multi-tenancy makes it dangerous. **Guilherme** has built and operates a live B2B SaaS platform on exactly this architecture, where one misconfigured IAM policy can put one tenant's data in front of another. He has wired Amazon Cognito, Amazon DynamoDB, and AWS Lambda together to keep millions of tenant-partitioned records isolated under real production load. Tonight **Guilherme** is walking us through the IAM policy-based isolation patterns that actually hold up, and the deployment-model trade-offs behind them. MongoDB Atlas isn't a database running on EC2. It's a hyperscale platform that MongoDB engineered on top of AWS. **Matt** works at the intersection of data, security, and cloud architecture, and he's here to open up how Atlas is actually provisioned and operated under the hood. Tonight **Matt** is giving us the engineering story: how MongoDB's own teams run Atlas on AWS, and how PrivateLink, KMS, IAM, and Marketplace are wired in to handle networking, security, and procurement. A big thank you to our sponsors [Cloudscaler](https://rebrand.ly/cloudscaler), [Rayo](https://rebrand.ly/rayo-cloud) & [The Scale Factory](https://rebrand.ly/scalefactory) for making this event possible. **Programme:** 18:00: Arrival, registration 18:15: Talks start 20:00: Networking with food and a drink provided by the generosity of our sponsors. **Talk 1:** ***Building Secure and Efficient SaaS Platforms on AWS Serverless*** with Guilherme Dalla Rosa Let's go on a journey through the world of multi-tenant architectures on AWS using serverless technologies. In this talk, we will uncover the key aspects of multi-tenancy, including security, tenant isolation, and performance. We will learn how to utilise Cognito for authentication, DynamoDB to store millions of tenant-partitioned records and lambda for compute. We will also explore different deployment models and their tradeoffs, and, finally, we will learn how to implement policy-based isolation with IAM to keep our execution context tied to one specific tenant and avoid data leakage. By the end of this talk, you will feel more confident building SaaS applications on AWS with serverless technologies and you will have learned some of the many insights that come from the AWS Well-Architected SaaS Lens. **Learning Takeaways** * Implement IAM policy-based isolation to scope each Lambda execution context to a single tenant and prevent data leakage * Evaluate pool, silo, and bridge deployment models - the cost, complexity, and isolation trade-offs of each * Use Amazon Cognito and DynamoDB together for tenant-partitioned authentication and millions of tenant-scoped records at scale * Apply AWS Well-Architected SaaS Lens patterns to make defensible, production-ready architectural decisions * Automate tenant provisioning from the start - the patterns that work at five tenants break at fifty **Guilherme Dalla Rosa** Guilherme is a seasoned software engineer with extensive industry experience, having contributed to projects across Brazil, Ireland, and the UK. He currently serves as the CTO of MerCloud, a B2B e-commerce platform that streamlines the sales process for companies. In addition to his leadership role at MerCloud, Guilherme is also an AWS Community Builder, where he actively shares his expertise and passion for leveraging technology to help businesses enhance their processes and achieve their goals. **Talk 2:** ***MongoDB Atlas on AWS - A Deep Dive with Matt Johnson*** MongoDB Atlas is more than a managed database service running on EC2. It is a cloud-native data platform engineered to take advantage of AWS infrastructure, automation, and security services so teams can build resilient, scalable applications without stitching the operational pieces together themselves. In this deep dive for the AWS user group, we'll unpack how Atlas is deployed and operated on AWS: How our internal teams provision and manage Atlas and how AWS-native integrations such as PrivateLink, KMS, IAM, and Marketplace simplify networking, security, and procurement. **Learning Takeaways** * Understand how MongoDB's own teams provision and operate Atlas on AWS, not just how the service looks from a customer's seat. * See how Atlas is engineered as a cloud-native platform, using AWS infrastructure and automation for resilience and scale that customers would otherwise build themselves. * Learn how AWS-native integrations - PrivateLink, KMS, IAM and Marketplace - are wired in to handle networking, security and procurement under the hood. **Matt Johnson** Matt is a Principal Technologist at MongoDB with over 15 years of experience across cloud architecture, security, data platforms, and developer ecosystems. He specializes in helping organizations build secure, compliant, and scalable data and AI systems, with a focus on cloud resilience, AI governance, and data automation. Matt regularly speaks on the intersection of data, security, and AI, helping teams turn emerging technologies into trusted, production-ready solutions. Do you have a story to share? If you are interested in speaking at one of our events, please check out our [call for papers](https://awsuguk.org/call-for-papers/). We are advocates for greater inclusion & diversity in UK Tech and are especially keen to receive talk submissions from people in underrepresented groups. If you are interested in speaking at a future meetup but would like to discuss what to expect or need assistance, please contact our Inclusion & Diversity Lead Natalie Gray - [graynataliej@gmail.com](mailto:graynataliej@gmail.com) or DM her @natjgray *** Check out our [website](https://awsuguk.org/) for more information about our community and our code of conduct. Remember to follow us @AWSUserGroupUK and on [LinkedIn](https://www.linkedin.com/company/aws-ug-uk) for the latest updates, and you can find videos of our past meetups [here](https://awsuguk.org/our-videos/).
Volunteering walk through LDN listening, helping homeless 07877920245
Wed, Jul 8, 5:30 PM
London Platform User Group (LOPUG), Wednesday 8th July, 6.30pm onwards
Wed, Jul 8, 5:30 PMFor our July meetup, we're back at the fabulous Accurx offices. We have two excellent talks lined up and the agenda will be: * 6:30pm - arrive, drinks, networking * 7:00pm - Welcome & Housekeeping * 7:15pm - **Talk 1: "Stop Wasting GPUs: How We Built a Golden Path for GPU Sharing on Kubernetes"** Everyone is hyped about frontier models as a service. The moment you need to run them yourself, for latency, cost, compliance, or just control, the bill shows up. You pay for a whole GPU even when your pod uses a sliver of it. Kubernetes has always counted GPUs like bricks: one pod, one card, done. That just changed. Kubernetes 1.34 ships a new way to schedule hardware, and NVIDIA lets you physically slice one card into isolated partitions. Put them together and you get real GPU sharing on Kubernetes. No time-slicing tricks. Real isolation, real savings. We built the whole stack from an empty cluster. Come to the talk and watch it run end to end on stage. **Speaker: Engin Diri, Senior Solutions Architect @ Pulumi** *As a Senior Solutions Architect at Pulumi with over 15 years of experience in the IT industry, including roles at the Schwarz Group and W&W Versicherungen, I bring extensive expertise with an end-user and enterprise focus. Currently working for a startup while collaborating with enterprise clients has further enriched my experience!* * 7.45pm - food, more drinks & networking * 8.00pm - **Talk** **2: "TBC"** **Speaker:** TBC * 8.30pm onwards - drinks and networking. So, please come and join us, we look forward to seeing you there. The LOPUG team. * Food and drinks provided * Good time will be had by all

GoodGym Kingston // Group Session // Do Good & Get Fit
Tue, Jun 30, 5:30 PM**PLEASE VISIT THE WEBSITE TO CONFIRM SESSION DETAILS AND LET US KNOW YOU PLAN TO ATTEND. THIS IS MANDATORY.** **Want to do something useful with your exercise? GoodGym is no ordinary gym. We're a group of people who get fit by doing good - helping out local charities and community groups with physical jobs like shifting compost and planting trees.** **📍 We meet at** **The Quaker Centre, Fairfield, Kingston Upon Thames, KT1 2PT** **at 6:30pm.** **🏃♂️ At 6:45pm we'll run, walk or cycle to do a 30-40 minute task.** **🏃♂️ Then we'll head back to where we started by 8:30pm, do some stretches and maybe grab a beverage?** It's FREE. It's fun. It's fulfilling. And we're a very friendly bunch. 🍇 — **BOOK ONTO THE SESSION** **To come to the session click here:** https://www.goodgym.org/v3/sessions **You will need to confirm your attendance on the GoodGym website** (this includes creating an account with us if you haven’t already - it only takes a few mins). The link above takes you to the session listings in your area - if this session doesn’t fit your schedule, you may find something that does so check it out. p.s. GoodGym is a charity and you will be asked whether you’d like to donate when first creating an account. The choice is yours and does not affect your ability to attend a session. — **FAQ** Not sure you'll keep up? GoodGym is for everyone (18+). Whether you've never run before, or are chasing a marathon PB, you are 100% welcome. We always have a back-marker so no one gets left behind. 70% of GoodGym members start as non-runners so if you're new to this kind of thing you will be supported by people who are all on the same journey. 👍 What do I need to wear? Most of us wear gym/running gear. Make sure you're prepared for the weather. Don't feel like you're fit enough? Our tasks are simple and fun. There are easy jobs as well as more challenging things for those who want a workout! The choice is always yours. Do I need to bring anything? Gardening gloves are really useful for a lot of GoodGym tasks. And a head torch too if it’s likely to get dark. Please bring some if you can but there’s no requirement 🧤💡🧤 What is GoodGym? We're a (really lovely) group of people who use our energy to make a difference in our local community (and in communities across the UK!). We often meet on a weeknight, at least once a week, for a session to do good and get fit. We'd love you to come and join us. Any questions, just pop a comment below or send me a message. Find out everything you need to know at goodgym.org
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