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!

Rubén Sospedra
Full-stack Engineer, Spain
Barcelona-based engineer with a Political Science background and a lifelong passion for automation. 13+ years in the game. I started by founding a remote startup, then moved through teams of every size. I thrive on complex problems. I ship at the highest standard and build for growth. AI is a multiplier in my toolkit, not a crutch. I give back through open source, conferences, and mentoring. Knowing when to move fast and when to get it right is the skill behind every other skill. Great software lives at the intersection of ambition and pragmatism.

Felix Zhang
Meta, USA
Software Engineer at Reality Labs, Meta. Project lead of Immersive Web Emulator (IWE) and Immersive Web Emulation Runtime (IWER). Founder of EliXR Games.

David Corbacho Roman
Wunder, Finland
Señor Developer at Wunder. Originally from Spain, I've been living in Finland for more than 10 years, focusing my career on web development and JavaScript.

Endel Dreyer
Colyseus, Brazil
Endel is the creator of Colyseus, an open-source multiplayer framework for Node.js.

Trust Jamin
Uploadcare, London, United Kingdom
Trust Jamin Okpukoro is a developer advocate and senior technical writer with a strong background in software engineering, community building, video creation, and public speaking. Over the past few years, he has consistently enhanced developer experiences across various developer products by creating impactful technical content and leading strategic initiatives. His work has helped increase product awareness, drive user engagement, boost sales, and position companies as thought leaders within their industries.

Isaac Mann
Narwhal Technologies, USA
Isaac is an Architect at Narwhal Technologies. He helps maintain the documentation for Nx at nx.dev and has created two video courses available at nxplaybook.com. Isaac is an Instructor at egghead.io with a focus on component design and xstate.

Juan Cruz Martinez
Okta, Germany
Juan helps people learn tech skills so they can level up their life. Founder of http://thecodeenigma.com, content creator, and Oktanaut!

Julio Arruda
GFT Technologies, Brazil
Wynxx Chief Architect at Grupo GFT | 9x Microsoft MVP | First Brazilian GitHub Star | LinkedIn Official Instructor

Daniel Afonso
PagerDuty, Portugal
Daniel Afonso is a Senior Developer Advocate at PagerDuty, SolidJS DX team member, Instructor at Egghead.io, and Author of State Management with React Query. Daniel has a full-stack background, having worked with different languages and frameworks on various projects from IoT to Fraud Detection. He is passionate about learning and teaching and has spoken at multiple conferences around the world about topics he loves. In his free time, when he's not learning new technologies or writing about them, he's probably reading comics or watching superhero movies and shows.

Pedro Filho
Blockchain.com, Portugal
Likes to work closely with UI and UX, and collaborate with product owners/managers to solve business problems.

Russell Fustino
Algorand, USA
Russ Fustino is a Developer Advocate on Blockchain for Algorand helping developers learn how to build Blockchain solutions. Russ is a Microsoft MVP reconnect in App Development and a former Developer Evangelist for Microsoft. Fustino has a passion for conveying relevant, current, and future software development technologies and tools. He shares that knowledge via live seminars, teachings, and internet video productions. Russ has enlightened, entertained and educated over one million developers over the course of his career. He is a recipient of the INETA Lifetime Achievement Award.

Jason Williams
Bloomberg LP, UK
Jason Williams is a Senior Software Engineer at Bloomberg LP in London, UK, focusing on performance. His work in performance includes collaborating with the W3C Web Performance Working Group to bring Container Timing to the web, a more accurate improvement over Largest Contentful Paint. He has also collaborated on V8 improvements, bringing heat snapshot times down from 10 minutes to 6 seconds.
In the open-source community, he is the original author and developer of Boa, an open-source JavaScript engine written in Rust.
He is heavily involved in the evolution of ECMAScript, serving as an author on the Stage 4 proposal for Promise.allSettled, which ensures all promises settle before returning results. He is also a champion for the Stage 3 Temporal proposal (for which Boa’s temporal_rs the implementation used in Chrome), which aims to provide standard objects and functions for working with dates and times in ECMAScript.

Mackenzie Jackson
GitGuardian - Developer Advocate, Netherlands
Mackenzie is a developer advocate with a passion for DevOps and code security. As the co-founder and former CTO of a health tech startup, he learnt first-hand how critical it is to build secure applications with robust developer operations.
Today as a Developer Advocate at GitGuardian, Mackenzie is able to share his passion for code security with developers and works closely with research teams to show how malicious actors discover and exploit vulnerabilities in code.
Claudio Wunder
HubSpot, Germany
Claudio Wunder is an Engineer at HubSpot working on their Frontend Platform. Claudio is part of OpenJS Foundation's governance and contributes to open source through Node.js, Webpack, OpenJS, GSoC, GNOME and other mediums.
Alison Yoon
Octopus Energy, UK
I'm a frontend developer at Octopus Energy. I come from a design background. UI/UX designer turned into an engineer, that's me.

Matheus Albuquerque
Staff Software Engineer @ Medallia, Prague, Czech Republic
Matheus is a Staff Front-End Engineer at Medallia, building their surveys platform and helping them shape the customer experience market with React, and a Google Developer Expert in Web Performance.
His areas of interest include React and its ecosystem, JS and compile-to-JS languages, DX, and perceived performance optimization. Aside from public speaking about these, he also volunteers at TechLabs, teaching front-end development.

Lee Robinson
Vercel, USA
Lee Robinson is the VP of Developer Experience at Vercel, where he helps developers build a faster web. He leads the community for the React framework Next.js and is an open-source contributor.

Arjun Attam
Microsoft, India
Arjun is a program manager at Microsoft, where his team builds Playwright. Playwright is a new library for automated end-to-end testing of web applications across all modern web browsers.

Haris Mahmood
Shopify, Canada
As a Senior React Native Engineer at Shopify, Haris is helping create a better world of commerce. He runs a developer focused online store (repitsupply.com), has a weird obsession with dinosaurs, and is still emotionally recovering from the terrible GoT finale.
Baris Guler
Delivery Hero, Germany
Working as an Engineering Mananger / Tech Lead for a couple of years alongside with a 15+ experience on engineering area in 3 (three) different countries working with several FE/BE & Full-Stack teams.

Paul Bratslavsky
Strapi, USA
Developer Advocate at Strapi by day and content creator by night, Paul Bratslavsky loves learning new things and sharing them with others. He is a big fan of everything React, and in his free time he loves learning about music and building apps.
Thomas Findlay
Findlay Web Tech, UK
Thomas Findlay is a 5 star rated mentor, full-stack developer, consultant, speaker, and technical writer. He is the author of "Vue - The Road To Enterprise" and "React - The Road To Enterprise" books and works with many different technologies such as JavaScript, Vue, Nuxt, React, Next, React Native, Node.js, Tailwind, Firebase, Python, and more. He has obtained MSc in Advanced Computer Science degree with Distinction at Exeter University, as well as First-Class BSc in Web Design & Development at Northumbria University.
Over the years, Thomas has worked with many developers and teams from beginners to advanced and helped them build and scale their applications and products. He also mentored a lot of developers and students and helped them progress in their careers.

