Mike Grabowski

Learn how to achieve better performance and optimize Android app startup time with Hermes.

Interested in the Hermes engine? Check the second part of our expert guide to find out how to integrate Hermes with React Native.

Want to use Hermes in your React Native app on iOS? Find out how to compile Hermes for Apple platforms. Check the first part of our expert technical guide.

Hermes is now available for iOS as well. Find out more about this JS engine - check the first part of our series on bringing Hermes to iOS.

Learn how to test your app in the cloud by reading the second part of our quick guide. You'll find out how to create such test and conduct it properly.

A quick guide on how to test React Native apps in the cloud instead of using testing devices. In this part, you'll find out how to prepare for this process.

Learn about the release of React Native 0.63.1 from Mike Grabowski - a Core Contributor and Callstack Co-Founder and CTO.

Recommendations related to the challenges and opportunities of building React and React Native apps.

React Native can help your business in the pandemic. Check our how-to guide for immediate cost reduction on app development.

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.