Radek Czemerys
@radko93
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Making apps mostly at @RumiDotAI. React Native and OSS enthusiast. Full time digital nomad.
Remote
Joined May 2010
If you have Product Hunt you can check https://t.co/RfyjFqQehx and if you're invested and I can hoop you up with a trail for few months.
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Surprisingly not everything revives around React Native (maybe because I'm outside of Poland🇵🇱), but today I'm launching X-ray. I've been a big part of the team building AI pipelines which combine different data sources and makes it so easy for people to see what's going on.
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⚠️ Heads up, React Native devs: We've just disclosed CVE-2025-11953, a critical CVSS 9.8 RCE vulnerability in the React Native CLI. 🚩The risk: An unauthenticated network attacker can get #RCE on your machine via the running dev server. Full technical breakdown & mitigation
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“Plug into services” = spend all your money on third party from day 1
Guillermo Rauch, CEO of Vercel, explained why modern apps don’t need you to reinvent backends, just build the frontend and plug into services. Full episode: https://t.co/3OdX7LGMxo
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I just sponsored @doublesymmetry. You can join me at: https://t.co/pdKwSLjKcT Thanks for adapting react-native-track-player to new arch!
github.com
A mobile product company. Building open source software and mobile products.
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Anyone running React Native 0.78 and having Expo as a dependency? I would like to upgrade but running on Expo canary sounds too risky? 🫤
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New year, new app, new architecture. 🎉 Kicked off 2025 by getting out a new fitness app, and it’s been a hit—10k+ users on day one! 🚀 Thanks to @reactnative's New Architecture and @RevenueCat, building, shipping, and monetizing apps has never been easier. 💪 Big shoutout to
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Wow this is a major issue with New Arch - ANRs happening constantly with Reanimated and Keyboard controller. Probably would recommend to stay off New Arch until 0.77
github.com
Describe the bug Since my app is on fabric, I have many ANR on text input here is one of the stack traces io.sentry.android.core.ApplicationNotResponding: ANR atsyscall at__futex_wait_ex atNonPI::M...
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Another pain point of New arch seems to be long build times. Android went from 25 mins to 45 mins (!). There's an official guide on how to improve that but it does not contain much about setting it on CI.
Second app running on New Architecture! Biggest pain point was actually migrating react-navigation + rn screens. But the whole ecosystem is in much better shape now that after 0.76 landed.
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Despite up to 15 dependencies being marked as ‘Not supported,’ the interop layer seems to handle it well enough. You can check your dependencies with running: npx rn-chk-new-arch
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Second app running on New Architecture! Biggest pain point was actually migrating react-navigation + rn screens. But the whole ecosystem is in much better shape now that after 0.76 landed.
I turned New Architecture in one of my apps on React Native 0.76 and had almost no issues. Didn't expect that to be the case, time to migrate all.
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Had this weird glitch on New Architecture as well
upgrading my app to react-native 0.76.x and random rectangles are appearing. Background colors are changed randomly, and random flashes 🫠 wish me luck wtf is this random giant white box, and below the black box?
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I turned New Architecture in one of my apps on React Native 0.76 and had almost no issues. Didn't expect that to be the case, time to migrate all.
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Are there any fast solutions for markdown for React Native? Streaming text with and rendering it as a tree is expensive.
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Big if true (it’s true)
Introducing (React) Native Bottom Tabs! 🎉 First Bottom Tab Navigator using Native Platform primitives for both Android and iOS. The API surface is almost a drop-in replacement for JS Bottom Tabs! ➡ `npm i react-native-bottom-tabs`
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React Native DevTools is one debugger for React Native, on by default. Re-engineered for correctness and reliability. A platform for future features.
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I know expo is there and it's simple to upgrade, but when was last time that an upgrade was so simple as tins one for apps? Just a few lines changed. Kudos to everyone that made this happen! https://t.co/3PeTypXv32
React Native 0.75.0 is out! This release brings support for percentage values in gap properties, New Architecture stabilization, updates to the template and init command, and much more ⬇️ https://t.co/Y4oC8ICf4Q
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React Native 0.75.0 is out! This release brings support for percentage values in gap properties, New Architecture stabilization, updates to the template and init command, and much more ⬇️ https://t.co/Y4oC8ICf4Q
reactnative.dev
Today we are excited to release React Native 0.75!
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