App.js Conference 2026 – A React Native Conference

The early birds tickets are now on sale.

Workshops

Writing native code for React Native with the Expo Modules API

The React Native community offers a lot great packages for tapping into native API’s, but every app is unique, and sometimes that means you need to write your own custom native code to interface with JavaScript. The Expo Modules API lets you write native modules with minimal boilerplate while utilizing modern language features, and with a consistent development experience on both Android and iOS. In this workshop, you’ll learn the core concepts of the Expo Modules API, set up your environment from scratch, and build your first modules step by step.

Animations and Interactions

This workshops will get you up and running with animations and interactions in React Native. We’ll focus on using Reanimated and Gesture Handler to improve the overall UX of your app and make it stand out. We’ll also introduce some of the 3d graphics concepts and will show you how the powerful combo of WebGPU, Three.JS, Reanimated and Worklets can provide your users with a unique experience.

Performance – analysis & optimization

These workshops dive deep into React Native performance, focusing on practical tools and techniques to help you write faster, more efficient React code. You’ll learn how to identify bottlenecks, optimize rendering, and take advantage of profiling utilities built into the ecosystem. Beyond JavaScript performance, we’ll also explore how to detect and diagnose native-level issues that can impact your app’s responsiveness. By the end, you’ll have a solid toolkit for delivering smoother, more reliable mobile experiences.

Mobile & Web with React Native

Discover strategies for building universal apps with React Native that target both mobile and web platforms. This workshop will cover concepts like: repository structure, routing, styling frameworks, animations, DOM components, and more. Learn how to leverage React Native APIs, which are increasingly converging with Web, to maximize code sharing and build high-quality apps tailored to multiple platforms.

Special thanks to our sponsors

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Silver Sponsor

Bronze Sponsor

Become our Sponsor

Promote your brand among the growing React Native community. There is no better place to showcase your brand than App.js Conf!

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Special thanks to App.js Conf 2025 sponsors

Brought to you by

Organizer

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.

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Main Partner

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.

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App.js on social media

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
— Delphine Bugner (@DelphineBugner) June 2, 2025

✨ Just attended @appjsconf in Krakow.

Incredible talks, stunning location, amazing food, and perfectly organized 👏

Best part? The community! Smart, fun, welcoming. Special shoutout to my new friend @entiendoNULL 🥳 @expo, you’ve got an amazing new teammate! 🚀 pic.twitter.com/I10UFQUSJQ
— Lennart Brandt | brandtnew labs (@brandtnewlabs) May 31, 2025

2nd day of @AppJSConf, amazing talks for today 🔥 pic.twitter.com/Mt6UZ4WhZN
— Oliver Lopez (@oliverloops) May 30, 2025

I love catching up with everyone at @appjsconf but particularly love hearing from other founders

They all exist in a future state and it’s super exciting for me to hear more about what that is and how they’re getting there
— Taz Singh (@tazsingh) May 30, 2025

Out here fostering US-polish relations. The vibes @appjsconf are immaculate. ~( ˘▾˘~) pic.twitter.com/1caBr3Pbcm
— onlydans (@DanStepanov) May 29, 2025

imagine trying to recreate this in a slack huddle https://t.co/V6wI5GLfW2 pic.twitter.com/u3ms0wEXNr
— Fernando Rojo (@fernandorojo) May 30, 2025

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 🙏
— Hirbod (@hirbod) June 1, 2025

And that’s a wrap on @appjsconf 2025! 🎉 Thanks to everyone who made these days soooo special. ✨

Hope to see you next year! 👋
— Software Mansion (@swmansion) May 30, 2025

The best conference in the best venue @appjsconf @swmansion pic.twitter.com/q56Ry9Iubc
— Paddy (@p_d_y) May 30, 2025

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

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Venue

Stara Zajezdnia

12 Świętego Wawrzyńca

31-060 Kraków

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Early birds tickets are available!

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Organized by Software Mansion, powered by the community.

App.js Conf

Join the biggest React Native & Expo-focused conference.

27–29 May ‘26

Kraków, Poland

The early birds tickets are now on sale.

Buy tickets

Workshops

Buy tickets

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

98%

of attendees would recommend App.js to a collegue

450 +

attendees on-site

20 000 +

live-stream views

26

talks

29

speakers

Special thanks to our sponsors

Platinum Sponsor

Gold Sponsor

Silver Sponsor

Silver Sponsor

Bronze Sponsor

Become our Sponsor

Promote your brand among the growing React Native community. There is no better place to showcase your brand than App.js Conf!

See the sponsorship offer

Special thanks to App.js Conf 2025 sponsors

Brought to you by

Organizer

Visit the website

Main Partner

Visit the website

Buy tickets

App.js on social media

Follow us on X

Venue

Stara Zajezdnia

12 Świętego Wawrzyńca

31-060 Kraków

See on map

Don't just wait.

Join us.

Are you interested in speaking at App.js 2026 or sponsoring our event? Contact us directly for any conference-related inquiries!

contact@appjs.co

paulina.macuga@swmansion.com

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Are you interested in speaking at App.js 2026 or sponsoring our event?
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