MSc CS. Sr Software Engineer. Film shooter 📷. Open source guy. Organizer of @rgcalioficial | CEO of @rodarlibre , also building @HoshiraApp 🔭
Bogotá, Colombia
Joined March 2010
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Juan Roa retweeted
La mejor y más completa app para conductores y moteros en Colombia 🔥🏍️🏎️
Descárgala gratis en AppStore y PlayStore: rodarlibre.co
Juan Roa retweeted
Feel like Opus 5.5 got dumber? Don't worry, Nerf Bench shows the opposite. It actually got 5.8% smarter since launch!
Juan Roa retweeted
I turned 39 today, and I invite you to join @sfrubyconf on Nov 10-11 for equal parts (1) learning about Ruby, AI and the frontier, and (2) party with me and your other Ruby friends!
Juan Roa retweeted
Xcode 27 removed Simulator.app, and we know that pressing 𝚒 in Expo CLI stopped working for a lot of you.
It works again now.
We also put your simulators in a browser tab. Check out the full blog about 𝚎𝚡𝚙𝚘-𝚍𝚎𝚟𝚒𝚌𝚎-𝚑𝚞𝚋 from @krystofwoldrich: expo.dev/blog/xcode-27-devic…
Juan Roa retweeted
Here are the 24 biggest updates you get by upgrading to SDK 58
00:20 iOS 27 & iPhone Duo
01:09 Expo Device Hub
01:45 Expo UI & Jetpack Compose components
02:53 App Intents (alpha)
03:22 Home screen widgets on Android
03:38 Variable fonts and SVG variables
03:57 Faster builds and faster Expo modules
04:27 Expo Modules 2.0 (beta)
05:12 Expo CLI for agents
05:27 React Native v0.88
05:58 Wrap-up and the Expo App Awards
🔗 useful links down below
SDK 58 is out 🙌
This SDK is built for iOS 27. Apps on SDK 58 will be ready for Duo on day one 📖.
The release also includes App Intents for Siri, 2x faster clean Android builds, faster Expo modules, and a CLI built for your coding agent.
Changelog: expo.dev/changelog/sdk-58
Upgrade: 𝚗𝚙𝚡 𝚎𝚡𝚙𝚘 𝚒𝚗𝚜𝚝𝚊𝚕𝚕 𝚎𝚡𝚙𝚘@^𝟻𝟾.0.0 --𝚏𝚒𝚡
Juan Roa retweeted
71 new products on makermap.lol today 🗺️
• Zerouter by @ZerouterAI 🇧🇷
• ProofSwap by @gauravmetrics 🇮🇳
• Hoshira by @jroadev 🇨🇴
• goodvat by @GoodVat_ 🇬🇧
• Aurora by @piccionenter 🇵🇱
+66 more → makermap.lol/products?sort=n…
I'm Juan 👋
MSc CS. Sr Software Engineer. Open source guy. Organizer of @rgcalioficial | CEO of @rodarlibre , Building @HoshiraApp , based in Bogotá 🇨🇴
Looking to meet founders and developers!
Just put myself on the map 👇
makermap.lol/jroadev?v=gf8wj…
xitter.cf/jroadev/status/2099997…
I'm 34, based in Colombia 🇨🇴
At day software engineer at local company
At night solo builder and founder at @rodarlibre.
Looking to connect with more builders, indie hackers, devs
Juan Roa retweeted
We had a security breach last night related to a large scale distillation attack that impacted 1.4% of OpenCode Console users
We have notified them all this morning via email. If you did not get an email you were not impacted, it was a subset of users who had external providers linked
The incident is ongoing so we cannot share more details at this point but we are working with Anthropic, OpenAI, and Google to remediate
Juan Roa retweeted
Code Review is now generally available for Claude Team and Enterprise plans.
Reviews are now faster, catch more of the bugs that matter, and admins can pick from Quick, Standard, or Deep review levels for each repo.
Juan Roa retweeted
📢 IT’S TIME
“Claude upgrade my expo SDK version now!!!”
SDK 58 is out 🙌
This SDK is built for iOS 27. Apps on SDK 58 will be ready for Duo on day one 📖.
The release also includes App Intents for Siri, 2x faster clean Android builds, faster Expo modules, and a CLI built for your coding agent.
Changelog: expo.dev/changelog/sdk-58
Upgrade: 𝚗𝚙𝚡 𝚎𝚡𝚙𝚘 𝚒𝚗𝚜𝚝𝚊𝚕𝚕 𝚎𝚡𝚙𝚘@^𝟻𝟾.0.0 --𝚏𝚒𝚡
Juan Roa retweeted
Claude Code ahora va 3 veces más rápido porque se han acordado de una tecnología de los años 90: gzip.
Juan Roa retweeted
This got me curious, so I built my own little magnet eyes app :)
Super fun experiment. Here’s the code if you want to try it: github.com/betomoedano/magne…
Metal effect is now available for SwiftUI. As expected, it reacts and bends when a magnet is nearby.
Ready to use on libraries.dev
Juan Roa retweeted
Expo SDK 58 is out 🎉
🤖 expo/agent-cli, a CLI built by agents, for agents
🗣️ app intents: expose your app to Siri and Apple Intelligence
🏠 home screen widgets on Android
⚡ ~2x faster clean Android builds
📱 out or the box support for iPhone Duo
... and more!
SDK 58 is out 🙌
This SDK is built for iOS 27. Apps on SDK 58 will be ready for Duo on day one 📖.
The release also includes App Intents for Siri, 2x faster clean Android builds, faster Expo modules, and a CLI built for your coding agent.
Changelog: expo.dev/changelog/sdk-58
Upgrade: 𝚗𝚙𝚡 𝚎𝚡𝚙𝚘 𝚒𝚗𝚜𝚝𝚊𝚕𝚕 𝚎𝚡𝚙𝚘@^𝟻𝟾.0.0 --𝚏𝚒𝚡
Juan Roa retweeted
I've used a lot of open source projects over the last few months, so I wanted to give something back.
Also, software is dead so... today I'm launching
Motion Lab ✨ My first ever oss project.
A playground for animating your images.
→ 6 animation styles
→ Speed and layout controls
→ Export
→ Free landing page template
Try it, remix it, build something with it 👇
github.com/dantegaleazzi/mot…
🔥👏🏽💪🏽
SDK 58 is out 🙌
This SDK is built for iOS 27. Apps on SDK 58 will be ready for Duo on day one 📖.
The release also includes App Intents for Siri, 2x faster clean Android builds, faster Expo modules, and a CLI built for your coding agent.
Changelog: expo.dev/changelog/sdk-58
Upgrade: 𝚗𝚙𝚡 𝚎𝚡𝚙𝚘 𝚒𝚗𝚜𝚝𝚊𝚕𝚕 𝚎𝚡𝚙𝚘@^𝟻𝟾.0.0 --𝚏𝚒𝚡
Juan Roa retweeted
Agents on Rails is back with Stage 3!
We put the best-performing models to the test with 7 new multi-step tasks, each spanning 3–8 tickets. From building Rails apps from scratch to navigating existing (and at times messy) legacy codebases, we wanted to see how well agents handle the kind of work developers actually face: going back and building on their own work.
Some highlights:
- Best overall: @OpenAI GPT-6.1 Sol offers a strong balance of accuracy, speed, and cost (60.8% success, $0.80 & 23m 35s per run)
- Most accurate: @AnthropicAI Opus 5.5 at max effort (65.3%, but it is also the most expensive and amongst the slowest)
- Fastest: @OpenAI GPT-6 Astra at medium effort (16m 36s, 54% success). Astra's max effort is also fast (22m 36s, 62.3% success).
- Cheapest: @OpenAI GPT-6 Luna ($0.19/run, 43.5% success)
We also combined all tasks from all stages into one central leaderboard.
Read the full Stage 3 report from @evilmartians here: rubyonrails.org/2026/10/13/a…
ALT Agents on Rails scoreboard showing stats for all 11 models tested in Stage 3 in October 2026. Claude Opus 5.5 (xhigh) is in first place with a 65.3% success rate.
Juan Roa retweeted
We’ve lost an icon. Margaret Hamilton, a computer science pioneer best known for her work at MIT leading development of the flight software for the Apollo missions to the moon, has died at 90. Read about her legacy via MIT News: news.mit.edu/2026/margaret-h…
ALT Margaret Hamilton is reclined inside a NASA spacecraft module, surrounded by control panels and switches.