React Universe Conf | Sept 2-4, 2025
@reactuniverse_
Bringing Worlds Together Sept 2-4, 2025 | Wrocław, Poland Powered by @callstackio 💜
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“Learn once, write anywhere” is the React motto, but what does it really take to deploy across mobile, web, desktop, AR/VR & TVs? @chris_trag, @kadikraman, @gorhom, @Danny_H_W and Khalef Hosany share the tradeoffs, tools & patterns behind building apps for every device.
From @expo apps to @GraphQL servers to publishing packages - @cpojer demonstrates how good defaults and open source tooling let you focus on your product instead of endless setup decisions.
Cross-platform at scale is more than “just add React Native". @risu_rene (@zalando) shows how his team is migrating the Zalando app: brownfield integration, React Strict DOM, and unifying patterns across web & mobile.
Fastest list in React Native & React DOM? Legend List v2. @jmeistrich (Legend / Bravely) reveals the optimizations behind it: signals, minimized renders, and platform-specific tricks for web & mobile.
Distributed web dev is standard. But what about mobile? @Zackary_Chapple (@ZephyrCloudIO) shows how Re.Pack 5 + Module Federation unlock true distributed mobile development, with independent modules, release velocities & instant rollbacks.
Async operations don’t have to mean flickering UIs and messy state management. @aurorascharff (Crayon Consulting) shows how concurrent rendering + Actions fix these pain points in React 19, and what’s next with View Transitions.
At HelloFresh, migrating existing iOS and Android apps to React Native meant rethinking how to deliver consistent cross-platform UI at scale. @OhansEmmanuel presents a battle-tested case study of how GenAI accelerated cross-platform React Native adoption.
Formula: @AmazonAppDev × @reacuniverse_ = coffee + smiles + dev talks 💜
Throwback to @reactuniverse_ few weeks ago — such a great time connecting with you all! We’ll be sharing some of our favorite moments over the next few weeks. Next stop: #ReactConf2025 😎 conf.react.dev
React Native is moving beyond single-threaded JavaScript. @_tjzel (@swmansion) showed how react-native-worklets unlocks concurrent JavaScript, pushing single-threaded JS to its multithreading limits.
React Native DevTools are powerful, but they still lack one crucial piece: extensibility. @ChmalSzymon (Senior Software Engineer at @callstackio) introduces Rozenite - a plugin framework that fills the gap by providing a way to extend React Native DevTools with custom plugins.
Node-API in React Native means cross-runtime, type-safe, and faster React Native development. @kraenhansen (@MongoDB) shows how Node-API brings faster builds, fewer native module failures, and better testing👇
Is zero-cost runtime styling in React Native possible? @jpudysz reveals both the engineering challenges and future opportunities of runtime styling in React Native, showing why the quest for zero-cost styling continues.
OTA sounds simple - ship updates instantly like the web. But at scale, it’s an illusion. @adam_mruk (@Klarna) shares what it really takes to build a reliable OTA system for millions of users.
Composition is React’s most powerful tool, but it’s also one of the most misunderstood. @FernandoTheRojo, Head of Mobile at @vercel, showed how composition is the key React pattern for scaling codebases - from one component to thousands - while staying maintainable.
A React Universe Conf 2025 highlight: a panel marking 10 years of React Native with @tomocchino (@vercel), @cpojer, @ccheever (@expo) & @grabbou (@callstackio). Milestones, key learnings, and most importantly: opportunities and predictions for the future.
From class components ➡️ hooks ➡️ compiler. @anisha_malde (Amazon) mapped out the generations of React, and how each shapes the way developers code, learn & share best practices.
Ottrelite bridges the gap between React Native DevTools and modern observability needs, making it easier than ever to trace, profile, and monitor apps across platforms. @artus9033 and @dominikdolny (@callstackio) bring you the complete picture in one talk.
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