Simon Willison is a British software engineer, open source creator, and AI commentator best known for co-creating the Django web framework and building Datasette, the open-source data exploration tool. He coined the term 'prompt injection' in 2022 and popularized 'AI slop' in 2024 - a word later named Merriam-Webster's 2025 Word of the Year. Through his prolific blog (active since 2002), newsletter with 54,000+ subscribers, and 100+ open source tools, he is one of the most influential independent voices at the intersection of LLMs and open source software.
Adam Wathan is a Canadian developer, entrepreneur, and the creator of Tailwind CSS - the utility-first CSS framework used by millions of developers worldwide. As CEO of Tailwind Labs, he turned a side-project experiment into a multi-million dollar business encompassing Tailwind UI, Headless UI, and an ecosystem of developer tools. A college dropout turned prolific course creator, he built his reputation first through 'Refactoring to Collections' and 'Refactoring UI' (co-authored with Steve Schoger), generating over $2.5 million in book sales alone. In January 2026, he made headlines again when AI's disruption of developer documentation led to dramatic revenue declines and significant layoffs at Tailwind Labs, prompting major sponsorships from Vercel, Google, and others rallying to support what they called 'foundational web infrastructure.'
Cassidy Williams is a Chicago-based software engineer, Senior Director of Developer Advocacy at GitHub, and one of the most recognizable voices in the frontend developer community. Known online as @cassidoo, she runs the widely-read weekly newsletter 'rendezvous with cassidoo,' builds mechanical keyboards, mentors early-career engineers, and has spoken everywhere from TED stages to the United Nations. She's a Glamour '35 Women Under 35 Changing the Tech Industry' honoree, a LinkedIn Top Professional, and a firm believer that you get a lot by giving.
Dave Rupert is a senior UX engineer at Microsoft, co-founder of the Austin-based web agency Paravel, and co-host of the long-running ShopTalk Show podcast. With over two decades in web development, he is widely recognized for his accessibility advocacy - notably founding The A11Y Project in 2014 - and for open-source tools like FitVids.js and FitText.js. He brings a maker's instinct, a teacher's heart, and a quietly sharp wit to everything he touches.
Delba de Oliveira is a Staff Developer Advocate and DX Engineer at Vercel who built Next.js Docs and the Next.js Learn platform, teaching millions of developers about React and Next.js. She transitioned from medicine and customer service into engineering, famously entering tech when a colleague asked her to 'open a GitHub issue.' Known for her visually rich educational content, conference keynotes at Next.js Conf, and her hobby as a videographer, she combines technical depth with storytelling instinct - bridging complex concepts and accessible learning in the React ecosystem.
Dominik Dorfmeister, known online as TkDodo, is an Austrian software engineer, core maintainer of TanStack Query (formerly React Query), and one of the most influential voices in the React ecosystem. Based in Vienna, he works as a Frontend Engineer at Sentry while helping shape how millions of developers approach server state management. His blog at tkdodo.eu - built on the philosophy that 'if I get a question three times, I write the answer down' - has become essential reading for React developers worldwide. With over 3.5 years maintaining TanStack Query (which now appears in nearly 20% of all React applications), conference talks from Berlin to Paris, and a co-created official course at query.gg, Dominik bridges the gap between library internals and everyday developer experience.
Jim Nielsen is a design engineer, writer, and curator with 20+ years at the intersection of design and code on the web. He writes the popular Jim Nielsen's Blog covering web development philosophy, design thinking, and the craft of building for the web. He's the founding engineer at Quadratic, co-creator of The iOS App Icon Book (€136K Kickstarter), and maintains the beloved iOS/macOS/watchOS icon gallery sites. A champion of the open web, HTML-first thinking, and the emerging 'design engineer' role, Nielsen bridges the gap between visual design and front-end engineering with rare fluency.
Josh W Comeau is a Montreal-based frontend developer, indie course creator, and one of the most beloved CSS and React educators on the internet. After stints at Unsplash, Shopify, Khan Academy, and Gatsby, he left corporate engineering in 2020 to build interactive, deeply original courses that generated over $550,000 in presale revenue. His CSS for JavaScript Developers and The Joy of React courses have taught more than 28,000 developers through a teaching style that blends interactive widgets, mini-games, and the rare gift of building genuine mental models rather than just showing code.
Kent C. Dodds is a world-renowned web development educator, open source engineer, and entrepreneur based in Salt Lake City, Utah. Creator of React Testing Library and the Testing Library ecosystem, he left a staff engineering role at PayPal in 2019 to build a self-employed education empire spanning EpicReact.dev, EpicWeb.dev, TestingJavaScript.com, and now EpicAI.pro. Recognized as a Google Developer Expert, Microsoft MVP, and GitHub Star, he has taught tens of thousands of developers through hands-on workshops, books, courses, and his long-running newsletter. Father of six and an adrenaline enthusiast who snowboards and rides a onewheel, Kent believes that kindness and teaching compound faster than any technology trend.
Lea Verou is a Greek-American web standards leader, MIT researcher, and creator tools advocate whose fingerprints are on the web itself. She has designed web technologies now baked into every major browser, built 30+ open-source projects with nearly 2 billion npm downloads (including PrismJS and Color.js), authored the bestselling CSS Secrets (O'Reilly, 2015), and served as an elected W3C Technical Architecture Group member. A PhD candidate at MIT CSAIL in Human-Computer Interaction and Programming Language Design, she consults for Google, Mozilla, and Stripe, leads the State of HTML survey, and has delivered 100+ conference talks worldwide - always live-coding.
Lee Robinson is a developer educator and engineering leader who spent five years at Vercel scaling Next.js to over a million monthly active developers, rising from individual contributor to VP of Developer Experience. He now serves as Head of AI Education at Cursor, teaching developers how to build software with AI-powered tools. Known for creating free courses like Mastering Next.js and React 2025, his newsletter 'Optimism (for the web)' and 234K+ Twitter following reflect his belief that great technology should be easy to understand and interesting to learn.
Mark Erikson is the primary maintainer of Redux and creator of Redux Toolkit - the tools that power state management in millions of React applications worldwide. Known online as @acemarke, he became the de facto keeper of Redux in 2016 when Dan Abramov handed off the project. Since then, he has rebuilt Redux's documentation from the ground up, designed the hooks API in React-Redux, and created Redux Toolkit to eliminate the boilerplate that once made Redux notorious. He is a Senior Front-End Engineer at Replay.io and a tireless community fixture - answering questions on Discord, Reddit, Bluesky, and anywhere else developers congregate online.
Paul Kinlan is the Lead for Chrome and Web Platform Developer Relations at Google, where he has spent over 16 years championing the open web. From growing up watching his dad repair computers on the Wirral in North West England, to launching Google Web Fundamentals, killing the 300ms click delay, and shepherding tools like Lighthouse, Squoosh, and Workbox into developers' hands, Kinlan has been the web's tireless advocate inside one of its most influential companies. Now he is turning his lens toward AI's impact on the web through his newsletter and blog AI Focus.
Wes Bos is a full-stack JavaScript developer, educator, and course creator from Hamilton, Ontario, Canada. He has taught over 500,000 developers worldwide through his free and paid online courses covering JavaScript, CSS, React, and Node.js. His flagship free course JavaScript30 has over 682,000 enrollments. He co-hosts the popular web development podcast Syntax.fm with Scott Tolinski and CJ Reynolds. His course business has generated over $10M in revenue, largely as a solo operation with a free-tier marketing strategy that has built a massive, loyal audience.