Writing native code for React Native with the Expo Modules API
Animations and Interactions
Performance – analysis & optimization
Mobile & Web with React Native
About App.js Conf
App.js Conf is the biggest React Native and Expo-focused conference hosted in Kraków. Across three days, you’ll meet the creators and contributors to React Native and Expo, share ideas, connect with the community, and shape the future of app development.
Each year, App.js Conf brings together top contributors, experts, and speakers from companies like Meta, Microsoft, Shopify, and Amazon.
Looking for a React Native conference in 2026? Here's your sign to join us!
98%
of attendees would recommend App.js to a collegue
450 +
attendees on-site
20 000 +
live-stream views
26
talks
29
speakers
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Promote your brand among the growing React Native community. There is no better place to showcase your brand than App.js Conf!
Software Mansion is a software development agency focused on building developer tools and open-source software. We're the React Native core contributors, experts in multimedia & streaming and community builders.
With Expo, you can create universal native apps with React that run on Android, iOS, and the web. Expo builds a whole ecosystem of tools that will help you to develop, review and deploy your apps with ease.
Last week I gave my second talk at @appjsconf - streaming, polyfills, cats, what else? 🙃 Thanks to @swmansion and @expo for having me, once again I came back with amazing memories - it’s great to be part of this community! https://t.co/6BSogCIx9b
This year’s @appjsconf was really special. The synergies were great, big groups formed, and everyone was more open, engaged, and mixed than ever. Great talks, great people, great memories, and great food (day 1 conf food was 💫). Thank you @swmansion and @expo 🙏
Okay, @appjsconf is a must-attend if you’re into @expo. Super professional event, and the community is incredibly smart and welcoming. I’ll be grabbing an early bird tickets the moment they’re live! 🚀 pic.twitter.com/PGaqlvuLP6
— Lennart Brandt | brandtnew labs (@brandtnewlabs) May 29, 2025