Schedule 18:00 Doors Open 18:45 Introduction 19:00 TBA 19:30 TBA 19:40: Break 19:50 TBA 21:00 Networking & Pub after Register now for CityJS London, 26 speakers already, with Douglas Crockford the JSON creator, and so much more! Calling All JavaScript Enthusiasts! 📢 Want to share your knowledge and inspire the community? 💡 We're inviting talented speakers to join our JSMonthly meet ups ✨ Submit your talk proposal here: https://forms.gle/kB2sG9tVUvAmWf826 Share your expertise, ignite the community 💫🔥 💫

👋 General Info Hi friends, We’re excited to kick off our next React meetup on February 18! Join us for an evening of practical insights, great conversations, and community vibes — from real-world React talks to networking with fellow engineers. 🗣 Call for Proposals Have an idea or story to share? Submit your talk proposal through our CFP form and take the stage at one of our upcoming meetups! 🤝 Organized by This event made possible thanks to the support from React Summit and JSNation organizers – GitNation.  🤝 Hosted by Huge friends to our friends Figma Figma is a browser-based design and prototyping tool enabling real-collaboration. Built for developers, Figma's Dev Mode gives you the power to easily inspect designs and translate them into code—without changing the design file. Headquartered in San Francisco, in 2020 Figma opened its EMEA HQ in London. We’re a team of makers who celebrate our differences and share a passion for our community. Our London based engineering team is growing quickly and working on some of Figma's top company priorities. 🤝 Want to support our community? We’re looking for venue partners and sponsors for future meetups. Let’s discuss collaboration — contact us! 🕑 Event Schedule 18:00 - Doors open - snacks, beer, socialization 18:30 - Opening notes 18:40 - The Lost Art of Debugging: Why Your Browser is Smarter than AI - Abdullah Ola Mudathir 19:10 - Talk TBA 19:40 - Networking, Open Mic Lightning Talks Mingle until 21:00 pm — 👍 Code of Conduct By registering for this event you agree to comply with our CoC 📩 Contact [email protected] https://twitter.com/ReactAdvanced http://youtube.com/ReactConferences https://bsky.app/profile/reactadvanced.gitnation.org

⚠️ The event will be in-person only - come watch live and network with like-minded people! 🚨 If you do not have a ticket showing "Attending in-person", you will not be let in to the building due to building security rules. Make sure you have a spot to avoid being turned back at the door. This month, Bitrise will be hosting us at their venue in York Road! (Please go to the WeWork to access the venue) 🕚 Timings 6:30 pm - 7:00 pm: Drinks & food 7:00 pm - 8:30 pm: Talks & Questions 8:30 pm onwards: Finish leftovers + Pub together 💻 Agenda Talks to be announced soon! 🏢 Sponsor & Hosts – Bitrise Bitrise is a mobile DevOps platform built around industry-leading mobile CI/CD and DevOps tooling. Bitrise ensures confidence, velocity, and continuous improvement across the entire cycle of app value creation, delivery, and realization. On Bitrise, teams easily release and maintain high-quality apps through automation, rapid iteration, and improvement in the development process. As a result, apps deliver more impact for the business, while teams scale quickly and efficiently. Founded by mobile developers, Bitrise is trusted by more than 6,000 mobile product organizations worldwide, including Rakuten, WISE, Bose, Virgin Mobile, Grindr, Compass, Mozilla, Philips Hue, and Marks & Spencer. Bitrise now counts 200+ people across continents, and has raised close to $100M in funding to date from investors like Insights Partners, Partech, Y Combinator, and more. 👥 Sponsor – Theodo Our team of 50+ agile web, mobile and software experts are based in Farringon, London with offices in Paris and New York. Over the last 10 years and across over 500 projects, we have partnered with non-technical founders to launch their first product, FTSE 100 companies to increase market share through launching internal startups & spearheading digital transformation initiatives, and SME CTOs to build and scale their technical teams. Theodo projects start fast, and progress even faster, with our unique methodology combining agile, lean and DevOps allowing us to build more efficiently as the project progresses. We are experts at React Native, NextJS, Serverless, React, Django/Python, Node.js, Symfony and all tech across the stack with experience in many other frameworks. ♿️ Accessibility Wheelchair access on site Range of dietary restrictions catered for this event: vegetarian 💅 Everything else If you have inquiries or would like to get in touch, send us a message on Guild directly or contact the organisers on LinkedIn: Mo: https://www.linkedin.com/in/mohammadkhazali/ Daniel: https://www.linkedin.com/in/daniel-belo-goncalves Michael: https://www.linkedin.com/in/michael-minsu-kim/ Jon: https://www.linkedin.com/in/jonathantizzard/

Register at https://london.cityjsconf.org When applications are getting bigger, some tools and features that help to manage this increasing complexity become more required. Let's check some of these features: composition/dependency Injection, runtime type assertions, reflection/mirroring and more, and see how we can use it in real live use cases. Understanding Decorators: Introduction to decorators, how they work, and their use cases. - Creating Simple Decorators: Building your first class and method decorators. - Advanced Decorators: Parameter decorators, accessor decorators, and returning values from decorators. - Reflect-metadata Library: Usage in TypeScript for adding and retrieving metadata. - Creating Mixins: Understanding and implementing mixins for class functionalities. - Framework Design Concepts: Planning and designing a simple framework using meta-programming concepts. - Implementing the Core Framework: Developing the foundational elements using decorators.

For performance, scale, and effectiveness This is not a beginner TanStack Query workshop. This workshop focuses on proven, production-grade patterns for architecting data fetching with TanStack Query, designed for applications that care about performance, scale, and long-term maintainability. We’ll go beyond APIs and hooks and focus on how the fundamental concepts scale. You’ll see how the same core ideas work for apps with a few hundred users and for systems serving tens of millions of users, without rewriting your mental model every six months. The patterns in this workshop are battle-tested in real production environments and are designed to improve developer experience, reduce complexity, and make performance predictable. We’ll also briefly step back and look at TanStack as an ecosystem, showing where other TanStack libraries fit and how to think about them as part of a coherent system, while keeping the main focus firmly on TanStack Query. The workshop draws directly from experience implementing TanStack Query in real production applications, ranging from small products to platforms serving tens of millions of users. Expect concrete patterns, trade-offs, and failure modes. You don’t need prior TanStack Query experience, but this workshop assumes you’ve built real applications. You’ll leave with a clear, scalable mental model for architecting data fetching with TanStack, and patterns you can apply immediately.

Register from singapore.cityjsconf.org Transform developers into well-rounded engineering leaders through this intensive, hands-on workshop. Participants will master critical skills across algorithmic problem-solving, system design, security, accessibility, observability, and design patterns. This workshop bridges the gap between coding proficiency and engineering excellence, preparing developers for senior roles and technical interviews at top companies.

Schedule: 18:00 Doors Open 18:45 Introduction 19:00 - 21:00 - Talks to be revealed soon. 21:00 Networking & Pub after Brought to you by the team that runs CityJS! More workshops are now available!! Thanks to Neo4j for paying for the pizza and drinks! Calling All JavaScript Enthusiasts! 📢 Want to share your knowledge and inspire the community? 💡 We're inviting talented speakers to join our JSMonthly meet ups ✨ Submit your talk proposal here: https://forms.gle/kB2sG9tVUvAmWf826 Share your expertise, ignite the community 💫🔥 💫

The creator of JSON and author of JavaScript the Good Parts will do a special workshop exploring the favourite parts of JavaScript. This is a 3 hrs workshop and it can be purchased either with a conference ticket or on its own. Grab your tickets from https://london.cityjsconf.org

Curious where React is headed next? 🔥 Join React Summit 2026 on June 12 & 16 in Amsterdam or Online for the unique React experience. Hear from top contributors, discover cutting-edge techniques, and connect with thousands of developers. 🚨 Important! To secure your spot, make sure to get your ticket through this LINK. 🎙 Call for Proposals Are you ready to speak in front of the world’s largest React audience? Submit your talk proposal via our CFP form and take the stage at the upcoming conference! What to expect: 🗣️ 60+ React experts - authors, contributors to the tools you use every day, and passionate rising stars 🏆 React OSS Awards - celebrating the best in open source 🚤 Amsterdam Vibes - connect with fellow devs while exploring the city by boat or on foot 🎉 React’s Biggest Party - festival atmosphere with music, activities, and more Don’t miss this celebration of React☀️ 🌷 Early Bird tickets are now available: https://reactsummit.com/ 👉 Follow us on social media: Bluesky, Twitter (X), Instagram, Linkedin, Facebook

Schedule: 18:00 Doors Open 18:45 Introduction 19:00 Refactoring 370 Files in 11 Hours (thanks Claude) // Scott Spence 19:25 Turning Downtime into Build Time: Lessons from Creating an AI-Powered Side Project // Sol Lee 19:40 Break 20:00. Multiplayer Xmas (Geo)-spatial Supabase Edition // Katerina Skroumpelou 20: 25 AI Bubble Round Table w/ David Benson and others 21:00 Networking & Pub after Brought to you by the team that runs CityJS! Early birds tickets are now book now yours Offer ends on 25th of November‼️ Thanks to Supabase & Storyblok for paying for the pizza and drinks! Calling All JavaScript Enthusiasts! 📢 Want to share your knowledge and inspire the community? 💡 We're inviting talented speakers to join our JSMonthly meet ups ✨ Submit your talk proposal here: https://forms.gle/kB2sG9tVUvAmWf826 Share your expertise, ignite the community 💫🔥 💫

Come and join us for GraphQL Day in Paris! This focused event brings together GraphQL practitioners, innovators, and thought leaders for a day of deep technical discussions and hands-on learning. 11th December GraphQL day is a one day event organized by the community for the community, hosted by apidays Paris. What to expect Technical deep dives, best practices exchange, community building, Q\&A sessions Full schedule: https://graphql.day Tickets: https://ticket.apidays.global/event/apidays-paris-2025/3cccd07f-acb2-466e-8d91-cb1f208ecf42/graphql-day-at-apidays-paris-2025 Speakers include these friendly London GraphQL faces: Benjie Gillam, Michael Staib, Pascal Senn, Jonathan Rainer & Martin Bonnin!

We're teaming up with JSMonthly for a Christmas special!! Schedule: 18:00 Doors Open 18:45 Introduction 19:00 Refactoring 370 Files in 11 Hours (thanks Claude) // Scott Spence 19:25 Turning Downtime into Build Time: Lessons from Creating an AI-Powered Side Project // Sol Lee 19:40 Break 20:00. Multiplayer Xmas (Geo)-spatial Supabase Edition // Katerina Skroumpelou 20: 25 AI Bubble Round Table w/ David Benson and others 21:00 Networking & Pub after Brought to you by the team that runs CityJS! Early birds tickets are now book now yours Offer ends on 25th of November‼️ Thanks to Supabase & Storyblok for paying for the pizza and drinks! Calling All JavaScript Enthusiasts! 📢 Want to share your knowledge and inspire the community? 💡 We're inviting talented speakers to join our JSMonthly meet ups ✨ Submit your talk proposal here: https://forms.gle/kB2sG9tVUvAmWf826 Share your expertise, ignite the community 💫🔥 💫

Schedule: 18:00 Doors Open 18:45 Introduction 19:00 The Cake Is a Lie... And So Is Your Login’s Accessibility // Ramona Schwering 19:25 Ship fast, not flawed! Detect & fix vulnerable components in your IDE with built-in MCP for your AI companion! // Bruno Bossola 19:40 Break 20:00 React, AI, and the Fragmented Future of Frontend // Hadar Geva 20: 25: Memory Leaks in the Wild: Advanced Detection and Scheduling // Konstantinos Leimonis 21:00 Networking & Pub after Brought to you by the team that runs CityJS! Early birds tickets are now book now yours Thanks to Monday.com hosting us & Meterian & Storyblok & Auth0 for paying for the pizza and drinks

Register at our website 🚀 AI Agent Workshop – London, Oct 31 Join us for a hands-on training where you’ll learn how to code with AI, build your own agents, and orchestrate them into multi-agent systems. 🔹 What you’ll do: Create agents with tools, memory & guardrails Build a travel itinerary multi-agent system Learn orchestration & cost optimisation 📍 When: Oct 31 | 3.5 hours 🎓 Prereqs: TypeScript, APIs, async ops, Postman, CLI 👩‍💻 Hosts: Khadija Al-Selini & Nkechi Anyanwu (Founding Engineers, Vouchsafe) Curious about how AI agents really work? This workshop is for you.

👋 General Info Hi friends, 🍁 Autumn is in full swing, and we’re excited to announce our next meetup! Join us on November 11 for an evening full of insights, inspiring talks, good food, and meaningful connections. 🗣 Call for Proposals Have an idea or story to share? Submit your talk proposal through our CFP form and take the stage at one of our upcoming meetups! 🤝 Organized by This event made possible thanks to the support from React Advanced Conference and Tech Lead London organizers – GitNation. 🤝 Hosted by Huge thanks to Which? for hosting the meetup! Which? is the UK’s consumer champion, here to make life simpler, fairer and safer for everyone. Our research gets to the heart of consumer issues, our advice is impartial, and our rigorous product tests lead to expert recommendations. We’re the independent consumer voice that influences politicians and lawmakers, investigates, holds businesses to account and makes change happen. As an organisation we’re not for profit and all for making consumers more powerful. 🤝 In collaboration with Shoutout to Storyblok for supporting the community! \*Storyblok is the CMS built by developers, for developers—an API-first, headless CMS that lets you choose your preferred front-end frameworks, integrate seamlessly with your favorite tools, and empower marketers to ship exceptional digital experiences WITHOUT creating endless Jira tickets.:) P.S. We're hiring! 🕑 Event Schedule 18:00 — Doors open: snacks, drinks & networking 18:30 — Opening notes 18:40 — Building Robust AI Chat Interfaces at Scale by Amman Vedi 19:05 — Talk TBA 19:30 — Break with drinks 19:45 — Networking & Open Mic Lightning Talks Mingle until around 20:30 — 👍 Code of Conduct By registering for this event you agree to comply with our CoC 📩 Contact [email protected] https://twitter.com/ReactAdvanced http://youtube.com/ReactConferences https://bsky.app/profile/reactadvanced.gitnation.org

Did you know JavaScript turns 30 in 2025? And we will have a birthday conference on April, 15-17. We are thrilled to reveal our next big conference taking place in Kensington Town Hall. We will soon reveal our first 4 speakers, one of which has had a big involvement in the creation of JavaScript. Get your tickets now whilst the price is low. Super Early Birds price will go up on 30th of September.

Schedule: 18:00 Doors Open 18:45 Introduction 19:00 How a vulnerability hack may happen and how to prevent it. //Bruno Bossola 19:35 Break 19:50 TBC 20:40 Networking & Pub after Brought to you by the team that runs CityJS! Early birds tickets are now book now yours - cityjsconf.org Thanks to Foolproof hosting us & Meterian & Storyblok for paying for the pizza and drinks Calling All JavaScript Enthusiasts! 📢 Want to share your knowledge and inspire the community? 💡 We're inviting talented speakers to join our JSMonthly meet ups ✨ Submit your talk proposal here: https://forms.gle/kB2sG9tVUvAmWf826 Share your expertise, ignite the community 💫🔥 💫

⚠️ The event will be in-person only - come watch live and network with like-minded people! 🚨 If you do not have a ticket showing "Attending in-person", you will not be let in to the building due to building security rules. Make sure you have a spot to avoid being turned back at the door. This month, Reward Gateway will be hosting us in their offices at Dean St! 🕚 Timings 6:30 pm - 7:00 pm: Drinks & food 7:00 pm - 8:30 pm: Talks & Questions 8:30 pm onwards: Finish leftover Nando's + Pub together 💻 Agenda Vishant Singh & Chris McKirgan - (Development Team @ Zoe) “Animating Joy with Rive” Nick Humberstone Talk TBD 🏢 Sponsor & Hosts – Reward Gateway When people are valued for who they really are in a way that's meaningful to them, it sparks a powerful movement. We help organisations to transform their people and culture to inspire even higher performance. 👥 Sponsor – Theodo Our team of 50+ agile web, mobile and software experts are based in Farringon, London with offices in Paris and New York. Over the last 10 years and across over 500 projects, we have partnered with non-technical founders to launch their first product, FTSE 100 companies to increase market share through launching internal startups & spearheading digital transformation initiatives, and SME CTOs to build and scale their technical teams. Theodo projects start fast, and progress even faster, with our unique methodology combining agile, lean and DevOps allowing us to build more efficiently as the project progresses. We are experts at React Native, NextJS, Serverless, React, Django/Python, Node.js, Symfony and all tech across the stack with experience in many other frameworks. ♿️ Accessibility Wheelchair access on site Range of dietary restrictions catered for this event: vegetarian 💅 Everything else If you have inquiries or would like to get in touch, send us a message on Guild directly or contact the organisers on LinkedIn: Mo: https://www.linkedin.com/in/mohammadkhazali/ Callum: https://uk.linkedin.com/in/callum-hemsley/ Daniel: https://www.linkedin.com/in/daniel-belo-goncalves Michael: https://www.linkedin.com/in/michael-kim-1b6679195/ Jon: https://www.linkedin.com/in/jonathantizzard/

Schedule: 18:00 Doors Open 18:45 Introduction 19:00 Practical Web AI: Built-In, Browser Based, Brilliant // Phil Nash 19:35 Break 19:50 Talk 2 - Soon to be revealed 20:40 Networking & Pub after Brought to you by the team that runs CityJS! Early birds now book now yours - \[cityjsconf.org]\(london.cityjsconf.org) Thanks to  Foolproof for hosting us Calling All JavaScript Enthusiasts! 📢 Want to share your knowledge and inspire the community? 💡 We're inviting talented speakers to join our JSMonthly meet ups ✨ Submit your talk proposal here: https://forms.gle/kB2sG9tVUvAmWf826 Share your expertise, ignite the community 💫🔥 💫

Hi friends, We’re happy to announce the upcoming React Advanced London Meetup 🎉 Let’s get together on October 15 for a deep dive into all things React! 🗣 Call for Proposals Have an idea or story to share? Submit your talk proposal through our CFP form and take the stage at one of our upcoming meetups! 🤝 Organized by This event made possible thanks to the support from React Advanced and Tech Lead London organizers – GitNation. 🤝 Hosted by Huge thanks to Zoopla! Win at moving, and find your next home with Zoopla. Zoopla is one of the UK’s most instantly recognisable property brands. In fact, we’re known and loved by over 91% of the nation (and we’re working hard on the other 9%). Our mission is to help the nation make better home decisions - by connecting everyone to their home and giving them personalised insights to help with moving, managing or financing. Over 50 million people visit Zoopla every month to access exclusive data and information on every UK property, search over 500,000 homes for sale and rent, find the best agents and secure the latest mortgage deals. 🤝 Want to support our community? We’re looking for venue partners and sponsors for future meetups. Let’s discuss collaboration — contact us! 🕑 Event Schedule 18:30 — Doors open: snacks, drinks & networking 19:00 — Opening notes 19:10 — Improving the Code Coverage and the Unit Test Cases with JEST in React Apps by Ajinkya Chanshetty 19:35 — How We Built an Agentic Crew in TypeScript by Khadija Al-Selini and Nkechi Anyanwu 19:50 — Networking & Open Mic Lightning Talks Mingle until around 21:00 — 👍 Code of Conduct By registering for this event you agree to comply with our CoC 📩 Contact [email protected] https://twitter.com/ReactAdvanced http://youtube.com/ReactConferences https://bsky.app/profile/reactadvanced.gitnation.org

Join us for Svelte London October!! We're being hosted by Tessl!

We’re excited to announce our partnership with Coding Black Females for CBF Fest 2025 Taking place 24th - 25th October, this festival showcases innovation, creativity, and the latest in technology. As a partner, we’re proud to support opportunities for professional growth, expertise, networking, and collaboration across the tech industry. Find out more and grab your tickets https://fest.codingblackfemales.com Use this code for a 15% discount: CITYJS\_CONF

This month we are hosting our event on Tuesday, September 30th ⭐ 📅 Schedule: 18:00 – Doors Open 🚪 18:45 – Introduction 👋 19:00 – JavaScript at the speed of Rust // Jim Dummett 🦀⚙️ 19:30 – Hello JARVIS - Building Voice Interfaces for Your LLMs // Nathaniel Okenwa 🎙️🤖 19:55 – Break 🧃🍪 20:10 – Your AI Application Needs Evals: Evaluation-driven development in the era of prompts // Uras Mutlu 🧪📝 20:40 – Networking & Pub after 🍺🍷🎶 🚀 Brought to you by the team that runs CityJS 🌍💛 🎟️ Super Early Birds — grab yours now 👉 \[cityjsconf.org]\(london.cityjsconf.org)🎟️🔥 📍 Taking place at monday.com office 🏢✨ 🙏 Thanks to monday.com for sponsoring food 🍔🍕, drinks 🍻🥂 and hosting 🎉 📢 Calling All JavaScript Enthusiasts! 💻✨ Want to share your knowledge and inspire the community? 💡 We’re inviting talented speakers to join our JSMonthly meetups 🎤💫 📝 Submit your talk proposal here: 👉 https://forms.gle/kB2sG9tVUvAmWf826 ✨🚀

This month we are hosting our event on Tuesday, September 30th ⭐ 📅 Schedule: 18:00 – Doors Open 🚪 18:45 – Introduction 👋 19:00 – JavaScript at the speed of Rust // Jim Dummett 🦀⚙️ 19:30 – Hello JARVIS - Building Voice Interfaces for Your LLMs // Nathaniel Okenwa 🎙️🤖 19:55 – Break 🧃🍪 20:10 – Your AI Application Needs Evals: Evaluation-driven development in the era of prompts // Konstantinos Leimonis 🧪📝 20:40 – Networking & Pub after 🍺🍷🎶 🚀 Brought to you by the team that runs CityJS 🌍💛 🎟️ Super Early Birds — grab yours now 👉 \[cityjsconf.org]\(london.cityjsconf.org)🎟️🔥 📍 Taking place at monday.com office 🏢✨ 🙏 Thanks to monday.com for sponsoring food 🍔🍕, drinks 🍻🥂 and hosting 🎉 📢 Calling All JavaScript Enthusiasts! 💻✨ Want to share your knowledge and inspire the community? 💡 We’re inviting talented speakers to join our JSMonthly meetups 🎤💫 📝 Submit your talk proposal here: 👉 https://forms.gle/kB2sG9tVUvAmWf826 ✨🚀

⚠️ The event will be in-person only - come watch live and network with like-minded people! 🚨 If you do not have a ticket showing "Attending in-person", you will not be let in to the building due to building security rules. Make sure you have a spot to avoid being turned back at the door. This month, Meta will be hosting us in their offices in Kings Cross! 🚨 Important: Participants will need to have their ID otherwise they won't be able to enter the Meta office 🕚 Timings 6:30 pm - 7:00 pm: Drinks & food 7:00 pm - 8:30 pm: Talks & Questions 8:30 pm onwards: Finish leftovers + Pub together 💻 Agenda Daniel Belo-Goncalves (Tech Lead @ Theodo) "Loyalty Cards, Tickets, and Magic Tricks: Wallet integrations in React Native" Meta panel discussion (feat. React Native core team & Theodo) 🏢 Sponsor & Hosts – Meta Meta's mission is to build the future of human connection and the technology that makes it possible. Our technologies help people connect, find communities, and grow businesses. When Facebook launched in 2004, it changed the way people connect. Apps like Messenger, Instagram and WhatsApp further empowered billions around the world. Now, Meta is moving beyond 2D screens toward immersive experiences like augmented and virtual reality to help build the next evolution in social technology. 👥 Sponsor – Theodo Our team of 50+ agile web, mobile and software experts are based in Farringon, London with offices in Paris and New York. Over the last 10 years and across over 500 projects, we have partnered with non-technical founders to launch their first product, FTSE 100 companies to increase market share through launching internal startups & spearheading digital transformation initiatives, and SME CTOs to build and scale their technical teams. Theodo projects start fast, and progress even faster, with our unique methodology combining agile, lean and DevOps allowing us to build more efficiently as the project progresses. We are experts at React Native, NextJS, Serverless, React, Django/Python, Node.js, Symfony and all tech across the stack with experience in many other frameworks. ♿️ Accessibility Wheelchair access on site Range of dietary restrictions catered for this event: vegetarian 💅 Everything else If you have inquiries or would like to get in touch, send us a message on Guild directly or contact the organisers on LinkedIn: Mo: https://www.linkedin.com/in/mohammadkhazali/ Callum: https://uk.linkedin.com/in/callum-hemsley/ Daniel: https://www.linkedin.com/in/daniel-belo-goncalves Michael: https://www.linkedin.com/in/michael-kim-1b6679195/ Jon: https://www.linkedin.com/in/jonathantizzard/