JavaScript experts, mentors, speakers

Matt Fellows is a core contributor to the Pact contract-testing framework, and co-founder of the microservices continuous delivery platform – Pactflow. A self-described polyglot who enjoys working at the intersection of technology, humans and ideas – ideally fully caffeinated. He's passionate about giving back to the tech community, sharing learnings at local meetups and conferences, and is a core contributor to the popular Pact microservices testing framework and author of the Muxy chaos testing tool. When not absorbing the Internet via osmosis, he can be found teaching kids at Code Club, playing basketball or pumping iron like Arnie.

Iwo Plaza is a software engineer & artist, trying to incorporate art into every project he gets his hands on. He's passionate about graphics programming and softening the learning curve for future developers trying to get into it. Author of TypeGPU and numerous interactive examples and games built using WebGPU for Web and React Native. His combined experience with C++ game engines and TypeScript's type system allow him to lead the project in a unique direction.

I am the founder of Integrix, an AI-driven agency that helps established businesses leverage artificial intelligence and automation to transform their sales and marketing strategies. With a background in sales and over a year of focused experience in AI and its practical applications, I specialise in guiding business owners to streamline operations by automating routine tasks and optimizing sales cycles. This enables them to concentrate on high-value tasks, accelerating growth and scaling their business.

Sahar is a software developer and a game enthusiast. She has been developing in the web and mobile platforms for years, but her childhood passion for games and gaming brought her to the game industry and her experience with web and mobile platforms gave her more insight to become an indie game dev. Starting with JavaScript web games made this passion burn brighter and she's been creating games ever since, working with different engines and experimenting with creating multiplayer and single player games.

Matias is an enthusiastic Software Developer who loves working with developer tooling. He’s an active member of Open Source communities and aims to contribute to the tools he uses. Matias aims to ease the day to day development experience of developers around the world while also making the experience as enjoyable and fun as possible. Matias is a huge advocate of using the web platform and the features it provides natively.

I’m a pasta eater biped working at DAZN as Principal Engineer. My areas of expertise are JavaScript and Front-End technologies with a DevOps flavour. I like Functional & Reactive solutions both for programming and architectures. I use spaces, not tabs.

Ondrej is a Jamstack enthusiast focused mostly on React and Vue-based tools. As a Developer Evangelist at Kontent.ai, he constantly stays connected with in-house and partner developers, which brings him closer to many interesting digital projects built with various tools. Always interested in problems that everyone claims have no solution, Ondrej enjoys building the architecture of components or applications and figuring out how all parts fit together. He also creates videos and speaks at conferences and podcasts.

Yonatan is a Team Lead at the Infra group at Wix.com, where he is able to make his love for creating developer tools a part of his daily work. He also enjoys working on open-source developer tools, and blogs about them at blog.yonatan.dev.

André is the founder and CEO of Encore, a backend development platform tool designed to free developers from the maze of complexity. He was previously a Staff Engineer at Spotify, and when he's not coding he takes care of an adorable puppy named Salvador.

Giulio is an Italian software engineer working at Flux and contributing to open source with Poimandres. He's deeply passionate about pushing the web platform to its limits, building things like custom React reconcilers, real-time computer vision on Web Workers and flex layout engines for THREE.js.

Szymon is a passionate software developer and a Microsoft MVP in web development. He is the creator of Rozenite, a plugin framework for React Native DevTools, and a member of the Callstack Incubator, where he focuses on building next-generation tooling to improve the React Native testing workflow. With extensive experience in React, React Native, Next.js, and Node.js, Szymon is dedicated to exploring cutting-edge technologies and advancing the developer experience.

After growing up with dead zones in Hawaii, Tiger wants to make apps that work offline and load fast. Today, he programs web apps as a senior engineer at Microsoft. Tiger is an enthusiastic member of the W3C working on new standards for the web, and has previously worked on Microsoft Edge, Firefox for Android, and Google Chrome. He creates art projects out of old devices, including junk phone wall decor and an e-reader tea menu. In his spare time, Tiger performs improv with his wife.

Senior Software Engineer at Sentry, working with SDKs, CLI and debugging tooling. Passionate about software development, with a special affinity for web technologies. After hours training and nutrition geek, a weightlifter, a climber, a recreational cyclist, a drummer and a music lover. Loves to cook and admires great food.

David is Chief Technologist at SQUER, a Software Company based in Munich and Vienna, working with different stacks and environments but always an overarching mission: connect ideas and provide impact — with technology. He spends much of his time on the frontlines tackling the challenges of scaling software and complex domains, with a strong focus on cloud-native architectures and infrastructures. David enjoys sharing his knowledge as a conference speaker and lecturer for his post-diploma courses at the University of Applied Sciences Technikum Vienna.

Daniel Irvine is a soft ware consultant based in London. He works with a variety of languages including JavaScript and Ruby. He’s a mentor and coach for junior developers and runs TDD and XP workshops and courses. When he’s not working, he spends time cooking and practicing yoga. He co-founded the Queer Code London meetup and is an active member of the European software craft community.

Burak Kantarcı works as the Product Manager at Thundra, a developer platform that empowers application teams to develop, debug, and deliver modern microservices on the cloud. With an engineering and design background, he is creating products to drive impact. His current goal is to ease developers' daily life and make their workflows more errorless and enjoyable.

Bruno is a passionate Software Engineer who loves crafting solutions that can help ease our lives and make it more fun. He is mainly interested in Web development, currently working with TypeScript, Elixir and React.

Web developer and graphic designer. Creator of Aleph.js and esm.sh.

My name is John Nguyen. I was born and raised in Berlin and I am currently working as a freelance Fullstack Engineer. I started my career in web development in 2013 with the LAMP stack and mainly used jQuery for a long time. Later, I got dragged into companies cloud migration where learned Serverless development, CI/CD pipelines and DevOps methods. Fast forward to now, and I am a Fullstack Engineer with expertise in Cloud Engineering on AWS, Platform Engineering, and Fullstack Development.

Hung Nguyen is a full-time Open Source Contributor. He loves to help others with his software. He is obsessed with Developer Experience (DX). So he created jest-preview to help frontend engineers to write and debug Jest tests effortlessly. He is also a core member of bestofjs.org, a curated list of Javascript packages, which helps you to follow the growth of the Javascript ecosystem.

Yuraima Estevez is Frontend Development Manager at Shopify. She cares deeply about building open source tools, teaches developers how to create inclusive apps, and is a co-organizer for the useReactNYC meetup. Her superpower is saying hello to every dog she sees, and her current obsession is her Stardew Valley farm.

Brazilian born, previously Spotify and Klarna, now building agent.perflab.io to help bridging the knowledge gap on performance tooling

Senior Web Developer & Engineering Manager based in Berlin with over 12 years of hands-on experience. I’m passionate about teaching and sharing knowledge—producing video tutorials and leading code courses at top programming schools. In my free time, I give back to the open-source community by maintaining projects like redux-offline, dracula-ui and clipboard.js,