Jorge Cohen
@excbadacc.es
EM in the ⚛️ React Team at Meta (London)
Previously:
🕶️ Orion AR Glasses at Reality Labs
🚂 Citymapper
I reverse engineer obsolete software/games and have a weird obsession with eink and Palm devices.
Previously:
🕶️ Orion AR Glasses at Reality Labs
🚂 Citymapper
I reverse engineer obsolete software/games and have a weird obsession with eink and Palm devices.
ICYMI - We're shipping 6 React Native this year and it's going to make your upgrading life easier! also, 1.0 maybe? who knows! I guess you'll have to watch the recording from React Native Universe. www.youtube.com/watch?v=GPto...
React Native Releases in 2025: Towards a Stable Future | Jorge Cohen at React Universe Conf 2025
YouTube video by Callstack
www.youtube.com
September 9, 2025 at 7:12 AM
ICYMI - We're shipping 6 React Native this year and it's going to make your upgrading life easier! also, 1.0 maybe? who knows! I guess you'll have to watch the recording from React Native Universe. www.youtube.com/watch?v=GPto...
We’re really trying here, but as you know “There are 2 hard problems in computer science: cache invalidation, naming things, and off-by-1 errors.”
One of the unique problems in React Native is naming debuggers.
React Native Debugger (at least 3 projects used that name), Remote Debugger, React Native DevTools, React Developer Tools, Chrome Debugger, Experimental Debugger, Hermes Debugger - all bad. The only good ones are Flipper and Reactotron
React Native Debugger (at least 3 projects used that name), Remote Debugger, React Native DevTools, React Developer Tools, Chrome Debugger, Experimental Debugger, Hermes Debugger - all bad. The only good ones are Flipper and Reactotron
August 31, 2025 at 9:27 AM
We’re really trying here, but as you know “There are 2 hard problems in computer science: cache invalidation, naming things, and off-by-1 errors.”
Reposted by Jorge Cohen
10 years, 5 voices, 1 panel that defines where React Native has been and where it’s going. It will be a rare chance to hear from @ccheever.com (@expo.dev), @cortini.co (Meta), @grabbou.com (@callstack.com), Christoph Nakazawa & @tomocchino.com (@vercel.com). Don't miss it 🎟️ clstk.com/4mNA8VK
August 22, 2025 at 10:48 AM
10 years, 5 voices, 1 panel that defines where React Native has been and where it’s going. It will be a rare chance to hear from @ccheever.com (@expo.dev), @cortini.co (Meta), @grabbou.com (@callstack.com), Christoph Nakazawa & @tomocchino.com (@vercel.com). Don't miss it 🎟️ clstk.com/4mNA8VK
Reposted by Jorge Cohen
We are excited to announce the release of React Native 0.81! 🎉
This new version brings Android 16 support, faster iOS builds (experimental), and several bugfixes.
reactnative.dev/blog/2025/08...
This new version brings Android 16 support, faster iOS builds (experimental), and several bugfixes.
reactnative.dev/blog/2025/08...
React Native 0.81 - Android 16 support, faster iOS builds, and more · React Native
Today we are excited to release React Native 0.81!
reactnative.dev
August 12, 2025 at 4:18 PM
We are excited to announce the release of React Native 0.81! 🎉
This new version brings Android 16 support, faster iOS builds (experimental), and several bugfixes.
reactnative.dev/blog/2025/08...
This new version brings Android 16 support, faster iOS builds (experimental), and several bugfixes.
reactnative.dev/blog/2025/08...
The rate of side-projects is intensifying, as shown by number of registered domains per week 😅
August 10, 2025 at 8:12 PM
The rate of side-projects is intensifying, as shown by number of registered domains per week 😅
I'll be speaking at React Universe Conf this year! Can't wait to share some of the work we've been doing to make React Native stabler for y'all!
🔹Meet the Speakers🔹
Faster releases, fewer surprises, better DX. @excbadacc.es (Meta) is leading a shift in how React Native ships, and he’s taking us behind the curtain at React Universe Conf.
Book your spot 🎟️ clstk.com/4oudlAi
Faster releases, fewer surprises, better DX. @excbadacc.es (Meta) is leading a shift in how React Native ships, and he’s taking us behind the curtain at React Universe Conf.
Book your spot 🎟️ clstk.com/4oudlAi
August 7, 2025 at 8:13 AM
I'll be speaking at React Universe Conf this year! Can't wait to share some of the work we've been doing to make React Native stabler for y'all!
My podcast player side-project thingy is going well, got a web version going too, and it's all deployed. Apps are on Testflight. First time since 2018 of having my own stuff ready to go out there! React Native and Expo are magic.
August 5, 2025 at 8:36 AM
My podcast player side-project thingy is going well, got a web version going too, and it's all deployed. Apps are on Testflight. First time since 2018 of having my own stuff ready to go out there! React Native and Expo are magic.
I understand why someone would use AI coding assistance, it’s great when you know what you want to build and know mostly what you’re doing. What I don’t get is trying to one-shot things. What’s the point? I can see the value in it as an LLM tech demo, but for a product? Nah.
July 31, 2025 at 3:34 PM
I understand why someone would use AI coding assistance, it’s great when you know what you want to build and know mostly what you’re doing. What I don’t get is trying to one-shot things. What’s the point? I can see the value in it as an LLM tech demo, but for a product? Nah.
My heart Flutters thinking of all the UI I can Swiftly Compose with React Native.
July 26, 2025 at 8:07 PM
My heart Flutters thinking of all the UI I can Swiftly Compose with React Native.
I love how Claude Code helps me overcome "writer's block" on my side-projects. I wanted to write this podcast player since forever (it's highly customized to my usecase, sync server and device) but couldn't bring myself to do RSS parsing for the thousandth time in my career 🥱
July 17, 2025 at 7:07 PM
I love how Claude Code helps me overcome "writer's block" on my side-projects. I wanted to write this podcast player since forever (it's highly customized to my usecase, sync server and device) but couldn't bring myself to do RSS parsing for the thousandth time in my career 🥱
React Native 0.80 is out, Check it out! first time for me on the release crew too.
React Native 0.80 is now available!
This release includes React 19.1, stability improvements to our JavaScript API, freezes the Legacy Architecture, and more.
reactnative.dev/blog/2025/0...
This release includes React 19.1, stability improvements to our JavaScript API, freezes the Legacy Architecture, and more.
reactnative.dev/blog/2025/0...
React Native 0.80 - React 19.1, JS API Changes, Freezing Legacy Arch and much more · React Native
Today we are excited to release React Native 0.80!
reactnative.dev
June 12, 2025 at 5:23 PM
React Native 0.80 is out, Check it out! first time for me on the release crew too.
Reposted by Jorge Cohen
I recreated Edward Hopper's "Nighthawks" using uDraw for the Nintendo Wii (and also turned all the people into Miis)
May 30, 2025 at 9:33 PM
I recreated Edward Hopper's "Nighthawks" using uDraw for the Nintendo Wii (and also turned all the people into Miis)
Reposted by Jorge Cohen
I'm experimenting with a way to show how DOS games render themselves.
Basically I'm recording a lossless video of the game running on a very slow (virtual) CPU, then removing all the frames where nothing happens, and I'm playing it back sped up a lot.
Basically I'm recording a lossless video of the game running on a very slow (virtual) CPU, then removing all the frames where nothing happens, and I'm playing it back sped up a lot.
May 30, 2025 at 4:58 AM
I'm experimenting with a way to show how DOS games render themselves.
Basically I'm recording a lossless video of the game running on a very slow (virtual) CPU, then removing all the frames where nothing happens, and I'm playing it back sped up a lot.
Basically I'm recording a lossless video of the game running on a very slow (virtual) CPU, then removing all the frames where nothing happens, and I'm playing it back sped up a lot.
let's go back.
May 21, 2025 at 2:26 PM
let's go back.
I just realized the other day, that I've been at Meta longer than I was at Citymapper - my first job in the UK, and the job I stayed in the longest in 20 years.
May 20, 2025 at 10:01 PM
I just realized the other day, that I've been at Meta longer than I was at Citymapper - my first job in the UK, and the job I stayed in the longest in 20 years.
@ericmigi.com Hi Eric, can’t wait until I get my watch in December. Is there a way for software developers to get a dev board? Or emulator is the best way forward for now?
May 11, 2025 at 1:35 PM
@ericmigi.com Hi Eric, can’t wait until I get my watch in December. Is there a way for software developers to get a dev board? Or emulator is the best way forward for now?
Reposted by Jorge Cohen
React Conf is back for 2025! Join our co-hosts, Meta and @callstack.com , October 7-8 in Henderson, Nevada or join the free livestream
April 8, 2025 at 2:36 PM
React Conf is back for 2025! Join our co-hosts, Meta and @callstack.com , October 7-8 in Henderson, Nevada or join the free livestream
Reposted by Jorge Cohen
React Native 0.79 is now available!
This release includes several performance improvements. Metro is now >3x faster to cold start! Android apps will also be faster thanks to changes to JS bundle compression.
reactnative.dev/blog/2025/04...
This release includes several performance improvements. Metro is now >3x faster to cold start! Android apps will also be faster thanks to changes to JS bundle compression.
reactnative.dev/blog/2025/04...
React Native 0.79 - Faster tooling and much more · React Native
Today we are excited to release React Native 0.79!
reactnative.dev
April 8, 2025 at 1:22 PM
React Native 0.79 is now available!
This release includes several performance improvements. Metro is now >3x faster to cold start! Android apps will also be faster thanks to changes to JS bundle compression.
reactnative.dev/blog/2025/04...
This release includes several performance improvements. Metro is now >3x faster to cold start! Android apps will also be faster thanks to changes to JS bundle compression.
reactnative.dev/blog/2025/04...
Reposted by Jorge Cohen
How your email finds me
March 18, 2025 at 3:03 PM
How your email finds me
Tonight's project- THE ICON! this is not going to win any design awards, but kinda fits in with the rest of the system, which is what I'm going for 😅
March 12, 2025 at 8:50 PM
Tonight's project- THE ICON! this is not going to win any design awards, but kinda fits in with the rest of the system, which is what I'm going for 😅
It's 2025, and I just want to be able to sync my iPod on my new Linux laptop, without gtkpod crashing or rhythmbox messing up my library.
A few days later:
A few days later:
March 11, 2025 at 11:15 PM
It's 2025, and I just want to be able to sync my iPod on my new Linux laptop, without gtkpod crashing or rhythmbox messing up my library.
A few days later:
A few days later:
Reposted by Jorge Cohen
I've had parts of this written down for a while - but I thought it was about time to document the detailed version of what happened during Balatro development
localthunk.com/blog/balatro...
localthunk.com/blog/balatro...
The Balatro Timeline — LocalThunk
It’s been approximately 3 years since I began work on Balatro - and in that time I have personally documented almost nothing about the journey. This is something that has bothered me since the game la...
localthunk.com
March 7, 2025 at 2:22 AM
I've had parts of this written down for a while - but I thought it was about time to document the detailed version of what happened during Balatro development
localthunk.com/blog/balatro...
localthunk.com/blog/balatro...
Reposted by Jorge Cohen
React Native 0.78 is now available!
This release includes React 19, support for Android vector drawables, easier brownfield integration on iOS, and more.
reactnative.dev/blog/2025/0...
This release includes React 19, support for Android vector drawables, easier brownfield integration on iOS, and more.
reactnative.dev/blog/2025/0...
React Native 0.78 - React 19 and more · React Native
Today we are excited to release React Native 0.78!
reactnative.dev
February 19, 2025 at 5:36 PM
React Native 0.78 is now available!
This release includes React 19, support for Android vector drawables, easier brownfield integration on iOS, and more.
reactnative.dev/blog/2025/0...
This release includes React 19, support for Android vector drawables, easier brownfield integration on iOS, and more.
reactnative.dev/blog/2025/0...
IIRC this was one of the last things I added to CM on iOS, nice to see it's being used and appreciated :P
Citymapper is the only app that’s figured out how to put numbers on the iPhone keyboard and I’m always shocked everyone doesn’t do it
February 17, 2025 at 9:31 AM
IIRC this was one of the last things I added to CM on iOS, nice to see it's being used and appreciated :P
Reposted by Jorge Cohen
Today, we’re deprecating Create React App for new apps, and encouraging existing apps to migrate to a framework.
We’re also providing docs for when a framework isn’t a good fit for your project, or you prefer to start by building a framework.
react.dev/blog/2025/02...
We’re also providing docs for when a framework isn’t a good fit for your project, or you prefer to start by building a framework.
react.dev/blog/2025/02...
Sunsetting Create React App – React
The library for web and native user interfaces
react.dev
February 14, 2025 at 6:44 PM
Today, we’re deprecating Create React App for new apps, and encouraging existing apps to migrate to a framework.
We’re also providing docs for when a framework isn’t a good fit for your project, or you prefer to start by building a framework.
react.dev/blog/2025/02...
We’re also providing docs for when a framework isn’t a good fit for your project, or you prefer to start by building a framework.
react.dev/blog/2025/02...