About MDN

From our beginnings to becoming the go-to resource for web developers worldwide, here's how we've evolved:

• 2005

  Launched as DevMo by Mozilla, a community-driven wiki dedicated to documenting open web standards.

  

• 2010

  Rebranded as Mozilla Developer Network (MDN), reinforcing our commitment to the developer community.

  

• 2017

  Achieved a milestone when major tech companies began contributing and supporting web documentation on our platform, solidifying MDN as the central hub for web development knowledge.

• 2020

  Transitioned from its wiki-based origins to a modern, GitHub-hosted project with the launch of Yari, modernizing our infrastructure and workflows.

  

• 2022

  Unveiled a major redesign and introduced MDN Plus, offering personalized features for an enhanced user experience.

  

• 2023/2024

  Launched new tools, including Playground for coding experiments, AI Help for easier content discovery, and HTTP Observatory for website security scans. We also introduced a Blog to cover interesting topics beyond MDN’s core focus, and a Curriculum to provide a structured approach to learning web development.

Discover more

We had fun exploring the internet archives and putting together a fast-forward trip through our transformation!

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• Accurate and reliable

  MDN is built on the fundamental principle of accuracy, which has established it as the trusted source of web documentation globally. We are committed to providing expertly curated and rigorously reviewed content to maintain the highest standards of quality and accuracy. Our dedication is backed by the best developer community in the world—a passionate group of contributors who help us enhance and refine our documentation. We welcome the knowledge and experience of our diverse developer community to ensure that millions of users can rely on MDN daily for up-to-date and accurate information.

• Collaborative and community-driven

  MDN is a Mozilla project that is powered by its global community. We are a diverse group of developers, writers, and technologists working together to build resources for a better web. Our open-source approach welcomes contributions from anyone. Each of the individuals who have contributed over the past decades has strengthened MDN. Through our GitHub repository, contributors can make changes and get their work reviewed and integrated into MDN’s content.

• Inclusive and dynamic

  MDN is committed to providing documentation for a wide range of web technologies while continuously adapting to the changing landscape of web development. We strive to create content that’s relevant and valuable to developers working across different browsers and platforms. We are dedicated to regularly updating our resources to reflect the latest standards and best practices, helping developers stay current in a rapidly changing field.

• Our mission

  At MDN, our mission is to provide developers with the resources they need to create innovative and accessible web experiences. We offer a free, high-quality, and comprehensive platform that includes documentation on essential web technologies like CSS, HTML, JavaScript, and Web APIs. Our learning materials are tailored for a diverse audience—from beginners and students to professors teaching web development.

From technical writers and engineers to product and community managers, we are a diverse group dedicated to driving MDN’s mission, growth, and success. Get to know the people behind MDN and discover what motivates us to keep you at the forefront of web development!

Joe Walker

• Senior Director
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• @joewalker
• Joe is based in London and has been at Mozilla since 2009. He got interested in Mozilla after suddenly being anointed as the maintainer of Venkman, a precursor to Firebug. He later worked on and managed Firebug and Firefox DevTools. Since 2020, he's managed various teams across Firefox Web Platform, including looking after the core parts of Firefox that you don't usually see—like JavaScript and the DOM. In 2025, he took on the leadership of MDN as well. Joe sometimes works from his office at the bottom of a disused canal, with three chickens and a few newts for company.

Ruth John

• Senior Manager
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• @Rumyra
• Based in the UK, Ruth has been working on MDN since 2017. Starting out as a contracting technical writer documenting fun Web APIs, she joined the team full-time in 2021 and now heads up the content and community teams. She has always been a big supporter of the web platform due to her long experience as a front-end developer and cares deeply about the accuracy and usefulness of MDN for its developer audience. In her spare time, you can find her walking her dog Yoshi or in her studio, where she enjoys sewing, sculpting, painting, and anything else that takes her away from a screen.

Glob

• Senior Engineering Manager
• 
• @globau
• Based in Perth, Australia, Glob started as a contributor before officially joining Mozilla in 2011. A former full stack engineer focused on improving engineering productivity, he moved into full-time management in mid-2020. He now manages the MDN engineering team, as well as the Firefox DevTools and WebDriver-BiDi teams. Outside of work, he spends his time on family, code, and games.

Dipika Bhattacharya

• Staff Technical Writer
• 
• @dipikabh
• Dipika works out of Toronto. She joined the MDN team in 2022, bringing her background in instructional design to the role. She is passionate about delivering clear and concise documentation to make complex concepts easy to understand, paying special attention to how information is organized and presented. She cares about improving the clarity, usability, and discoverability of MDN’s documentation. Outside of work, she loves exploring the city, discovering unique coffee shops, and trying different cuisines.

Vadim Makeev

• Staff Technical Writer
• 
• @pepelsbey
• Based in Berlin, Vadim has been working on MDN since 2023. He combines his previous experience as a front-end developer with a deep passion for browsers and the web platform. Before joining Mozilla, he worked as a DevRel for the Opera browser, authored front-end courses, and was also involved in organizing conferences and meetups. In his spare time, he goes on bikepacking trips, hangs out on punk gigs, and records podcasts and videos in his home studio.

Brian Smith

• Staff Technical Writer
• 
• @bsmth
• Brian has been with MDN since 2022. He lives in Berlin. With around 20 years of experience hacking on web technologies and working full-time as a technical writer since 2016, Brian is passionate about open-source software and writing docs that make complex concepts fun and easy to grasp for people of all levels. Before joining Mozilla, Brian worked on a TypeScript-like language specification, a time series database, and REST API documentation for cloud services. Outside of work, he enjoys exploring new European destinations with family, discovering local coffee shops, and using music gear as long as it doesn't have a screen.

Dave Letorey

• Technical Writer

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• @dletorey

• Based in London, UK, Dave has been with MDN since 2022 where he's been focused on Firefox release documentation, particularly HTML, CSS and SVG updates. He's passionate about web standards, accessibility, performance and digital inclusion. He is constantly learning about new web technologies and standards.

  Outside of work he loves live music and tries to attend as many gigs and music festivals as he can. He particularly loves post-punk, indie, house and techno. He also attends many conferences and meetups and is an organizer of London Web Standards & State of the Browser. He also has a large collection of red hats, so is easy to spot in the wild. He is never happier than when in a field with his friends.

Chris Mills

• Technical Writer and Product Strategist
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• @chrisdavidmills
• Based in Greenfield, UK, Chris has been part of MDN since 2013, initially as a technical writer and then as the writers' team lead until 2021. He came back on board as a contractor in 2022 to document new technologies and contribute to various MDN products and initiatives. Chris loves tinkering with CSS and JavaScript and is passionate about accessibility and semantics. Outside work, he is obsessed with loud, heavy music, and plays drums and guitar. He enjoys cycling, country walks, and spending time with his wife and three awesome kids.

Hamish Willee

• Technical Writer
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• @hamishwillee
• Based in Melbourne, Australia, Hamish has been with MDN since 2014, initially on short-term contracts for various projects. From 2020, he’s been focused on Firefox release documentation, particularly Web API and HTTP updates, while also contributing to other aspects of the open-source project. He’s passionate about efficient processes that maximize time for creating clear, concise, and maintainable documentation. Hamish values that his writing reaches thousands of developers and enjoys working with the diverse community to make expert knowledge accessible to everyone in a clear format. Outside work, he brews beer, reads science fiction and fantasy, enjoys running, and likes drones.

Andi Pieper

• Staff Software Engineer
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• @argl
• Andi lives in Berlin. He joined the MDN team in 2023. He is focused on keeping up the high quality of MDN and ensuring that it remains an accessible, competent, and friendly help for anyone concerned with the web, regardless of their level of expertise. Growing up with the internet of the 90s, Andi has worked on a multitude of projects on the web over the years, occasionally veering off into desktop and mobile development. Apart from his daytime obligations, he enjoys creating organized noise.

Claas Augner

• Senior Software Engineer
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• @caugner
• Based in Paris, Claas has been working as a Software Engineer in the MDN team since 2022. He is passionate about clean code and continuous improvement. He enjoys entertaining (the team), and maintaining (the platform). Outside of work, he loves baking rye sourdough breads and playing cooperative board games.

Leo McArdle

• Senior Software Engineer
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• @LeoMcA
• A London-based long-term Mozilla contributor, Leo has been working on MDN since 2022 and volunteering for Mozilla since around 2008. As a self-taught developer, largely through MDN, he cares about making the website discoverable and functional for everyone. In his free time, he can be found cycling around the city, photographing panoramas, or watching almost every sport imaginable, from cricket to karting.

Pranshu Khanna

• Staff Community Manager
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• @pransh15
• Pranshu has been a long-term contributor to Mozilla as a Rep. Based in Berlin, he joined the MDN team in 2024. He works on moderating, growing and managing MDN’s awesome community. Pranshu is passionate about building a healthy and inclusive community for developers and helping them build better. Before working at Mozilla, Pranshu gained extensive experience in growing developer communities for startups, organizing conferences like GraphQL Conf. 2021 & 2022, and running global programs for devs and students around AI, Web, and DevOps. In his free time, he likes to play football in any form - physical, digital, and fantasy.

Sonal Sood

• Senior Product Manager
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• @s-sood
• Sonal lives in Berlin. She has been with MDN since 2022. As a product manager, she is adept at identifying and prioritizing features that truly meet users' needs. With a strong background in data analysis and product management, she is always focused on delivering valuable and impactful products that make a difference. In her free time, Sonal enjoys cycling, running, and practicing yoga.

Miruna Curtean

• Quality Assurance
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• @mirunacurtean
• Miruna calls Cluj-Napoca, Romania home. Contracting with Mozilla since 2019, she worked on Firefox Add-ons and Mozilla Support before switching to MDN in 2022. She focuses on analyzing requirements and community issues, building comprehensive test bases, and ensuring delivered features meet requirements. Before Mozilla, she worked in game development and e-commerce but found greater joy in website development, particularly inspired by its community aspect. Outside of work, Miruna enjoys story-based entertainment including books, movies, shows, anime, and podcasts.