JSNation US 2025

Addy Osmani is an engineering leader working on Google Chrome. He leads up Chrome's Developer Experience organization, helping reduce the friction for developers to build great user experiences.

Creator of Bun.

I own and make video tutorials teaching web development for Level Up Tutorials, releasing a new premium series every month. I also co-host Syntax.fm with Wes Bos. Syntax is a popular, light hearted web development podcast that teaches full stack topics while staying fun. I enjoy breaking also known as breakdancing, and have been dancing for over 15 years doing shows for professional NFL and NBA teams. I'm inspired by a hot cup of green tea, excellent music, and Shaw Bros. kung fu movies.

As a JavaScript performance enthusiast, and fine-grained reactivity super-fan, Ryan is obsessively passionate about the future of JavaScript frameworks. He is the creator of SolidJS, and a maintainer of Marko.

Mariko is a Chrome Developer Relations Engineer. She works on the Baseline project bringing clarity to information about browser support for web platform features.

Marco is a Senior Security Engineer at HeroDevs. Active contributor, releaser, and member of the Node.js Technical Steering Committee, he is a renowned international speaker and a Microsoft MVP. Marco is actively involved in many projects within the Node.js ecosystem and also serves as a delegate in TC39.

Sia Karamalegos is a freelance web developer and performance engineer. She's also an international conference speaker, writer, and Google Developer Expert in Web Technologies. She organizes the Eleventy Meetup and co-organizes the PerformanceObserver meetup.