Jakub Romańczyk (@_jbroma) profile picture

dev @rork, previously @callstackio

Cracow
Joined May 2022
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Re.Pack 5 is here! ⚡️ 5x faster with Rspack 🤝 Module Federation 2 support 🪶 Up to 90% smaller configs 🛠️ Reanimated, Expo Modules, & NativeWind plugins 📖 Check out the full announcement blog post below 👇
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Jakub Romańczyk retweeted
I want to share a preview of something I've been working on called Exact. It's a new Agent Native app framework written in Rust. It's extremely fast and tries to let you build exactly the experience you want with no compromises.
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Introducing The Rork Podcast. We fly out founders to break down what they've built, how they've grown, and what it actually takes to scale mobile apps to millions of users. First up: @madebycol (4 apps, 4M+ users), joined by host @alfiearnaud_. A few things we get into: - Finding the viral format before building the app - How to hire (and fire) creators - Why retention starts with the idea itself Building something interesting? If you're a founder who'd like to come on, our DMs are open 👀 youtu.be/HOW5WEAMn7k
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Introducing Web Domains in Rork Buy a domain in seconds or connect your own, and your site goes live on it. Rork sets up DNS and free HTTPS for you Give your site a name people remember.
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e2e started as a side project a few months ago. we released it on the 1st of October and hit 1.5M+ npm downloads and over 12k GitHub stars in a month. now we are renaming the company to e2e. and... we're just getting started
TesterArmy is now e2e. The software verification layer for the agentic coding era. Announcing our new brand identity and $8M seed round. e2e.com/blog/seed
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We raised $8M to build the software verification layer for the agentic coding era. We hit 1.5M npm downloads, 12k GitHub stars and 60 contributors in the first month. Backed by: @CredoVentures, @kaya_vc, @PointNineCap, @baobab_ventures and @scriptcapital. Joined by incredible angels: Oscar Salazar (co-founder of Uber), @marcinzukowski (co-founder of Snowflake), @Carles_Reina, @chadbyers, @emilkowalski, @lukas_m_ziegler, @MattSwulinski, and many more. Very proud of the whole team. We're just getting started. 🫡
TesterArmy is now e2e. The software verification layer for the agentic coding era. Announcing our new brand identity and $8M seed round. e2e.com/blog/seed
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TesterArmy is now e2e. The software verification layer for the agentic coding era. Announcing our new brand identity and $8M seed round. e2e.com/blog/seed
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Jakub Romańczyk retweeted
Introducing SWC Next: the foundation for SWC’s next major version, built on a new architecture inspired by Yuku. - Up to 3x faster native parsing - Up to 10x faster parsing through the JavaScript API - A flat, ESTree-based AST designed for speed, memory efficiency, and JavaScript extensibility Starting with parsing, we’re bringing the rest of SWC to this new architecture. Built together by the SWC and Rstack teams.
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Jakub Romańczyk retweeted
e2e has just hit 10k GitHub stars! 🚀 github.com/tester-army/e2e
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Introducing Rork Web Build dashboards, client portals, admin tools, and public sites right next to your mobile app. Buy a domain in Rork or connect your own, and host it all in one place.
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An Uber-style app with iOS 27 Siri support, fully built in Rork Ask "where's my driver?" and Siri tells you the driver, the car and the plate Get your app ready for iOS 27 in Rork
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Introducing e2e The agentic testing framework for any app ~/ npx e2e init → Fully Open Source → Mix deterministic and agentic APIs → Supports web, mobile, and more → Bring your own agent and infrastructure → Run locally or in CI tester.army/e2e
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Very excited to announce that @kacperkapusciak is joining @TesterArmy as DevRel Engineer 🎉 Kacper spent years at Software Mansion working on the React Native libraries half the ecosystem runs on, including React Native Screens, React Navigation, Reanimated and Radon IDE. Now he'll help us build the TesterArmy platform and our new open source library e2e, and create the best content out there around both, so stay tuned 👀 Welcome to the team, Kacper!
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Jakub Romańczyk retweeted
GPT-6.1 Sol is now in Rork OpenAI's new Sol for deep codebase work and long-running agents. Near-Astra coding at a fifth of Astra's price.
GPT-6.1 Sol: near-Astra intelligence for a fifth of the price. It’s the most cost-efficient model for its performance available today.
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Jakub Romańczyk retweeted
Claude Sonnet 5.5 is live in Rork Anthropic's fastest Sonnet, with a sharp eye for UI design. Generates output over 30% faster than Sonnet 5
Introducing Claude Sonnet 5.5, the second model in the Claude 5.5 family. It’s a clear upgrade over Sonnet 5, runs more than 30% faster, and costs up to 30% less for most work.
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iPhone Duo is now in Rork Build apps for both screens and test them on a live Duo in 3D simulator.
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we’re open-sourcing e2e this thursday. e2e is an agentic testing framework for both web and mobile apps. You can mix agentic and deterministic APIs in the same test. Bring your own agents and your own infra. ➡️ tester.army/e2e
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I am most afraid of us eating the productivity gains of agents by just becoming lazier.
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It feels like Opus 5.5 is a model where the slop isn't the default setting
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Jakub Romańczyk retweeted
I've been working with Re.Pack lately and needed to explain how it works to my team. So I made this with Opus 5.5. Host, mini apps, and why a mini app can never ship native code, in under 4 minutes. #ReactNative #RePack @repack_rn @callstackio
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Jakub Romańczyk retweeted
iPhone Duo simulator is coming soon to Rork. Things are about to get a whole lot more fun
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