Mike Grabowski

React Native CLI 3.1.0 and 4.0.0 are out now! Find out how it makes developers experience better and what has changed comparing to the previous version.

Find out all about React Native Testing Library becoming Testing Library. Dive into insights and updates as we navigate this transformative journey.

Learn more about Rebolt - Callstack's take on developing React Native apps in Reason.

Learn more about ReRoute - new open source library created to help developers in navigation, written in Reason.

Callstack is focused on cross-platform development with React Native as a primary technology. Check examples of tools we created for our clients in Open Source.

Case studies of our clients' success in React Native mobile app development - each having its own set of problems and expectations

One of the most popular examples on using Flowtype with Redux is the F8 app, open-sourced by Meta. Check the article for more details.

We are happy to announce the React Native EU 2017 conference. Keep an eye on the conference website for more details.

A step-by-step guide to testing your React Native apps for iOS ecosystem.

This episode provides insights into the most intriguing aspects of React Native. Check the podcast to find out what our special guests have to say!

Listen to Mike Grabowski talk about React Native FastIO, a collection of primitives for working with data in React Native and its performance benefits.

Explore how React Native Windows compares to Electron, its benefits for desktop apps, and practical tips for getting started or migrating from native apps.

The 10th episode of The React Native Show podcast includes the answers for questions asked during React Native Eu 2021 conference in the Q&A panel form.

Discover how Hermes boosts React Native performance on iOS and macOS, with insights into AOT, bytecode precompilation, and the future of Hermes support.

This episode explores Re.Pack, an Open Source, Webpack-based toolkit to build React Native apps with the full support of the Webpack ecosystem.

The first episode of React Universe On Air (formerly known as The React Native Show) provides insights into React Native Testing Library. Mike and his guest give a quick glimpse into the very concept of Testing Library and tell the story behind React Native Testing Library.

Learn how Shopify's migration to React Native led to 86% code unification, reduced build times, and seamless feature parity across platforms.

Discover the story behind Definitely Typed with its creator, Boris Yankov, and learn how it became essential for type-safe JavaScript in the TypeScript ecosystem.

Tune in to React Universe On Air to learn what's new in React Navigation 5, how it improves app routing in React Native, and what to expect from the upcoming v6.0 release.

Learn everything about React Native Paper—from its core features to native-like animations, performance with Turbo Modules, and future development plans.

Learn how to tackle brownfield development with React Native, explore real-world challenges, and discover the React Native Brownfield library.

Explore runtime hooks, prefetching MF remotes, and more in Re.Pack 5.1. Join us live or watch the replay.

Discover how Module Federation and Re.Pack enable true cross-platform super apps with React Native. Learn best practices and real-world strategies for dynamic, modular architectures.

Discover how to build universal Super Apps using React and React Native. Join Mike Grabowski, CTO at Callstack, as he explores dynamic code delivery, native UI rendering, and how RePack bridges the gap with Module Federation.

Learn to fix JS performance issues in React Native—from debounce bugs to Redux selectors—in this hands-on webinar with real code examples.

Discover how to skip 90% of native builds in React Native CI using RNEF. Includes a live demo and cost-saving insights from Expensify’s setup.

Missed the React Universe Meetup SF? Watch the livestream recording soon—talks on RN performance, optimization, and build-free workflows await.

Watch Callstack's webinar on React Native JS performance. Learn to fix bottlenecks, leaks & FPS issues from the 2025 Ultimate Guide authors.

Learn more about Callstack's React Native Enterprise Framework straight from its creators.

Learn how to use React Native in existing apps to speed up cross-platform development without a full rewrite. Watch the expert-led webinar now.

Join us for a deep dive into Polygen: Callstack Incubator's breakthrough in React Native development!

We’re checking out LynxJS for the first time! Join us as we test it out, see how it works, and share their thoughts.

Mike and Oskar tried both Repl.it and Bolt.new to code a new conference app, and after burning millions of tokens, they fell back to Cursor.