JavaScript experts, mentors, speakers

With more than 20 years in open source, Andrey Sitnik created a few popular CSS tools (PostCSS, Autoprefixer), local-first framework (Logux), and many small libraries with millions of downloads (like Nano ID).

Frontend Vimmer. A Web Developer and Web Dev Tool Developer. Open Source with Rust/TypeScript. ast-grep is my hobby project!

Oleg Šelajev is a developer advocate at AtomicJar working on making integration tests with Testcontainers better for everyone in the community. VirtualJUG leader. In 2017 became a Java Champion.

Craig is a software educator, backend developer, and self-taught polyglot who thrives in the deep end and loves doing what people say isn't possible. He subscribes to the growth mindset, and hopes you will too. He knows that coding is fun, and makes sure that learning it feels that way too. As a developer, his strength is bridging the gap between idea and implementation to ensure that both programmers and product managers are speaking the same language. You should hang out. Craig lives in Portland, Oregon.

Alex is a Developer Relations engineer at VoidZero, a Nuxt.js Team member, Web Engineering Consultant, and open-source enthusiast. He creates tech-focused video content, co-hosts the DejaVue Podcast, speaks at conferences, and leads workshops to empower developers and advance the web ecosystem.

I am a book author, international speaker, researcher, software architect, and seasoned software engineer. I am a recognized figure within the Haskell community, renowned for pioneering ideas in the world of functional programming. I have authored two books: "Functional Design and Architecture" (in two editions) and am currently working on my third book, "Pragmatic Type-Level Design." Additionally, I have created my own development methodology known as Functional Declarative Design, serving as a counterpart to Object-Oriented Design. With over 14 years of experience across various programming stacks, including C++, Haskell, C#, and Python, I have traversed the full spectrum of roles, progressing from a regular developer to a software architect and team lead. I have previously served as a member of program committees for C++ conferences, including C++ Siberia and C++ Russia. I was working with the speakers all around the world to help them prepare their talks and to make their participation in the conferences smooth and joyful. As a seasoned speaker, I have delivered more than 20 talks at both local and international conferences, including a keynote presentation on functional C++. My personal mission revolves around providing practical insights into constructing industrial-grade applications using concepts from functional programming.

Oleg is a UI Engineer and the founder of Webstudio, an Open Source visual development platform that aims to break through the limits of popular no-code tools and solve designer-developer collaboration challenges.

David is a design engineer and creator of React Bits, building animated, highly customizable React components and contributing actively to open source tools that help developers build faster and more creatively.

Jen Luker is a Sr. Frontend Engineer, conference speaker, and BookBytes podcast co-host. She has spent the majority of her career as a full-stack developer using PHP, Javascript, and CSS, but has a particular fondness for frontend technologies. She is an advocate for both accessibility, and processes that make doing the right thing easy and the wrong thing hard. When she's not exploring solutions, learning new technologies, or reading, Jen's spare time is spent spinning yarn from raw wool and knitting; she's even been known to 3D print her own tools for the job. She is also fascinated by all things space, antique cars, and IoT.

David Burns, heads the Open Source office at BrowserStack. He is also a core contributor to the Selenium project and Chair for the W3C Browser Testing and Tools Working Group.

Marius Hobbhahn is the CEO & founder of Apollo Research, and part of the TIME100 AI 2025 list, which recognizes the 100 most influential people in artificial intelligence. Apollo is a technical AI safety org that works with OpenAI, Anthropic, and other frontier labs on model evaluations. Before that, he did a PhD in ML and worked on AI forecasting at EpochAI.

Sathya is a software engineer on the React core team at Meta, where he is currently building the React compiler. Previously, he worked on the V8 JavaScript compiler at Google.

Stefan Baumgartner is a software architect based in Austria and the owner of oida.dev. He is the author of “TypeScript in 50 Lessons”, published by Smashing Magazine, and "The TypeScript Cookbook", published by O'Reilly. He organizes ScriptConf, DevOne, and Rust Linz, and co-hosts the German-language Working Draft podcast. Stefan enjoys Italian food, Belgian beer, and British vinyl records.

I'm a developer and open source enthusiast. I like Rust, Go, TypeScript, and fast websites. I work at the Deno company, building Deno and Deno Deploy, and serving as a delegate at TC39.

Carolina is always exploring new paths and looking for new perspectives for solving problems. As a computer scientist working at Briza, she loves to work in challenging industries, like insurance. She believes that everyone is responsible for making the tech environment safer and diverse. Pasta maker, coffee enthusiast and book lover.

Daniel Ehrenberg is a software engineer on Bloomberg’s JavaScript Infrastructure & Tooling Engineering team. He serves as the Vice President of Ecma International and contributes to Ecma TC39, the JavaScript standards committee. Daniel has dabbled in WebAssembly and web standards as well, both while at Bloomberg and in his previous positions at Igalia, a free software cooperative, and at Google on the V8 team, the JavaScript engine in Chrome.

Salma writes code for your entertainment. She specialises in streaming live coding, and loves helping people get into tech. After a career as a music teacher and comedian, Salma transitioned to technology in 2014, working as a front end developer and tech lead for startups, agencies and global e-commerce. Active in the developer community, Salma is a Microsoft MVP for Developer Technologies, winner of the Jamstack Conf Community Creator Award 2021, and a partnered Twitch streamer where she builds weird websites, roasts your code, and chats about the tech industry every week.

Elizabet Oliveira, a former hip-hop artist and now a design engineer at Xata, is known for combining creativity and design in open-source projects. She created the award-winning React-Kawaii library and was the lead designer for "Elastic UI," a popular design system at Elastic. Famous for her unique presentations, including her "Fork this" rap song, Elizabet aims to bridge the gap between front-end development and design.

VP of delivery at This Dot Labs, Vue Js guru, JS lover, A11y fan, PWA explorer, @gitKraken Ambassador, book author and super dad.

Manjula loves contributing to OSS in her free time. She loves teaching and believes it is best way to learn more and more. She is one of the organisers for React India.

Elio Struyf has led a remarkable career as an award-winning Engineering Lead, a trusted information technology thought-leader, and an energizing public speaker with over a decade of experience facilitating events and conferences across Europe. Over his career, he has been invited to numerous cities including Barcelona, London, Paris, and Stockholm, where he has spoken on thought-provoking, development-related topics on Microsoft 365, SharePoint, and Azure DevOps. His extensive knowledge has seen him recognized as a Microsoft MVP ten times, three times as a GitHub Star, a Google Developer Experts, and he has been recognized as a SharePoint/Microsoft 365 Top 25 Influencer four times. Today, along with acting as VP of BIWUG (Belgian Information Worker User Group), Elio works as an independent contractor for his own consulting company, Struyf Consulting. Elio remains a sought-after speaker at various Microsoft-related community events and conferences, where he inspires, educates, and creates authentic connections with technology professionals and developers across Europe.

Ido Salomon is a seasoned AI lead and software architect. He is the creator of AgentCraft and MCP-UI, the co-creator and maintainer of MCP Apps on the MCP Steering Committee, and the co-creator of GitMCP. Previously, Ido was an architect who led end-user AI at Palo Alto Networks. He is an avid open-source contributor who has created several high-profile projects in the agentic AI space. Today, Ido focuses on the future of human-agent interaction at scale.

GraphQL co-creator, Facebook engineering director

Barry Pollard is a Web Performance Developer Advocate in the Google Chrome team, working on Core Web Vitals and the Chrome User Experience Report (CrUX). He is one of the maintainers of the HTTP Archive and it's annual Web Almanac publication. He's also the author of HTTP/2 in Action from Manning Publications.