JavaScript experts, mentors, speakers
Explore personalities and their talks, workshops, videos, and articles. While we focus primarily on JavaScript and frameworks like React, Vue, Svelte, and Node, you may find experts on other fields on our Portal. To name a few – Testing, DevOps, Machine Learning, and many more!

Monica Powell
Newsela, USA
Monica Powell is a software engineer who is passionate about making contributing to open-source more approachable, creating technology to elevate people, and building community. You can find her developing educational technology as a Senior Software Engineer at Newsela, teaching web development, and contributing to open-source projects. GitHub recognized her as an inaugural GitHub Star based on her involvement in the tech community.

Luciano Mammino
fourTheorem, Ireland
Luciano was born in 1987, the same year Super Mario Bros was released in Europe, which, by chance is his favorite game! He started coding at the age of 12, hacking away with his father's old i386 armed only with MS-DOS and the QBasic interpreter and since then he has been professionally a software developer for more than 14 years. He is currently a senior Architect at fourTheorem where he is helping companies to get the best of the cloud, AWS and serverless. He loves the full-stack web, Node.js & Serverless and co-authored "Node.js design patterns", maintains fstack.link and co-hosts awsbites.com.

Shem Magnezi
Wilco, Israel
Shem has more than a decade of experience in software engineering in various domains: client and server-side, real-time systems, big data, mobile, and web. Shem is passionate about building a culture of growth mindset and obsessed with making teams work better together. After several years as a senior IC in WeWork and Meta, Shem is now the CTO and Co-Founder of Wilco, a platform that empowers every developer, regardless of their background or skill level, to unlock their full potential.

Scott Spence
GraphCMS, UK
I’m a developer advocate working with GraphCMS to create content that helps remove friction and educate around the GraphQL space. I create content written in the blog here and also in educational videos supporting the written content. I’m a second career dev, that reskilled from a VBA analyst developer role into web development. I’m a massive fan of the Jamstack I have a wealth of knowledge working with Gatsby and am spending a lot of time familiarising myself with Svelte and SvelteKit.

Maaret Pyhäjärvi
Vaisala Oyj, Finland
Maaret Pyhäjärvi is an exploratory tester extraordinaire with a day-job at Vaisala as Principal Test Engineer. She is a tester, (polyglot) programmer, speaker, author, and a community facilitator. She has been awarded the two prestigious global testing awards, Most Influential Agile Testing Professional Person 2016 (MIATPP) and EuroSTAR Testing Excellence Award (2020), and selected as Top-100 Most Influential in ICT in Finland 2019&2020.

Catalin Miron
Senior Engineer, Czech Republic
I'm a nomad developer, currently living in Prague, Czech Republic.
I love giving life to UI through animations. I'm a speaker, YouTuber, father of 2, React & React Native enthusiast, Open Source contributor and coffee geek. In my free time I help others to succeed.

Jason Mayes
Google, USA
Jason is the public face of Web AI and TensorFlow.js at Google, helping web engineers around the world take their first steps with machine learning in JavaScript. Jason is the author of the 1st Web ML course on Google Developers and EdX, that has enabled over 40,000 students to start their journey with Machine Learning in the browser. He also combines his knowledge of the technical and creative worlds to develop innovative prototypes for Google's largest customers and internal teams with over 15 years experience working within web engineering and investigating emerging technologies. Jason also hosts the popular Made with TensorFlow.js show on the TensorFlow YouTube channel giving a voice to Web ML developers across industries globally.
He holds an MEng in Computer Science, is a member of the British Computing Society, and is a certified information privacy technologist. Jason loves sharing knowledge online which has attracted a global following.

Nathen Harvey
DORA & Google Cloud, USA
Nathen Harvey leads the DORA Advocacy team as a developer relations engineering manager at Google Cloud. Nathen has had the privilege of working with some of the best teams and open-source communities, helping them apply the principles and practices of DevOps and SRE. He has been a co-author of the Accelerate State of DevOps report for the past three years. Nathen also co-edited and contributed to 97 Things Every Cloud Engineer Should Know.

Alba Silvente Fuentes
Storyblok, Netherlands
Alba Silvente, aka Dawntraoz, is a Sr FullStack Engineer at Storyblok. She loves writing about FE development, Jamstack, and Web Performance on her blog, speaking at conferences, hosting a Spanish tech podcast, and working hard in the open-source community. She is also a GoogleDevExpert in Web Technologies, a Microsoft MVP and an ambassador at WTM & Nuxt.

Jecelyn Yeen
Google (Chrome DevTools), Germany
Jecelyn Yeen is a DevRel engineer at Google working on Chrome DevTools and Browser Automation. Her work focuses on understanding and activating the ecosystem around developer tooling.
When she’s not coding (and avocado-ing), she’s jumping into mysterious sea waters in search of narwhals and mermaids.

Henri Helvetica
Command-h, Canada
Henri is a web performance and user experience advocate, supporter of performance literacy and a 5k distance runner. More importantly, he's busy building a mini empire focusing on developer media. Command-h is a small org in support of all his passions: people and development. When not combing through research docs, case studies and profiling, he can be found curating the next and best in person experience possible.

Yoko Li
a16z, USA
Yoko is a tech cartoonist, engineer, product manager and partner at a16z. She spent years as an engineer writing developer tools at AppDynamics and Transposit using React and Anguar, and was a product lead for Terraform Cloud at Hashicorp. Currently, Yoko is a partner at a16z by day, investing in the Javascript ecosystem, and a cartoonist by night, when she draws cartoons to make fun of tech.

Jordan Harband
HeroDevs, USA
TC39 team member and an editor of the specification from 2018-2021. Jordan has been heavily involved in the node community for as many years, and has gradually created (but mostly inherited or been gifted) a decent number of open source projects.
His focus is JavaScript, standards, frontend web development, full stack (frontend + backend + db) architecture design, and overall object oriented code optimization.

Ian Johnson
ObservableHQ, USA
Ian Johnson is a data visualization developer and software prototyper at ObservableHQ. Ian has been turning data into pixels for more than 15 years, cheering on the developments in web standards and open source technologies that enable ever richer forms of communicating data.
Ian helped found the Bay Area D3 User Group, a community of thousands of d3.js practitioners, to learn from other like-minded folks. He has prototyped software and visualizations for companies, researchers and causes. He enjoys sharing his understanding and is often tweeting about data visualization and the creative process.

David Rousset
Microsoft, France
David is a Senior Program Manager in the Developer Division at Microsoft, working on the end-to-end dev experience for Teams & Azure Communication Services. He’s also the co-creator of Babylon.js. Even if he’s stopped contributing to the project a couple of years ago, he’s still passionate about WebXR and uses it to fun experiments. David is also interested in music composition, quantum computing & video gaming.