/

/

/

/

/

23:57

4/16/2025

Online

Bring Your Favorite Language to React Native

Date

Wednesday, April 16, 2025

Time

Location

Wrocław, Poland

Online

Bring Your Favorite Language to React Native

Learn how to integrate native libraries in React Native, without TurboModules. Robert shares a practical approach using WebAssembly and introduces PolyGen.

Date

16 April 2025

-

Time

Location

Wrocław, Poland

Online

Bring Your Favorite Language to React Native

Video Unavailable

Organizer

Organizer

Presented

React Universe Meetup

@

Speakers

Speakers

Featuring

Robert Pasiński

React Native Developer

@

Callstack

Featuring

Robert Pasiński

React Native Developer

@

Callstack

Ever hit a wall trying to integrate native libraries in React Native that aren’t written in C or C++? Robert Pasinski, Senior Software Engineer at Callstack, shares how to break past those limitations, without writing a single TurboModule.

Presented at the React Universe Meetup in Wrocław (April 2024), this talk introduces PolyGen, a new toolkit that uses WebAssembly to embed code written in languages like Rust, Go, and even COBOL into your React Native apps. Robert dives into performance trade-offs, platform compatibility, build system headaches, and how WebAssembly provides a unified ABI that makes it all… just work.

Facing complex cross-platform challenges?

We help deliver consistent experiences across platforms with one codebase.

Link copied to clipboard!

Share

//

Save my spot

Bring Your Favorite Language to React Native

Learn how to integrate native libraries in React Native, without TurboModules. Robert shares a practical approach using WebAssembly and introduces PolyGen.

//

Insights

Learn more about Cross-Platform

Here's everything we published recently on this topic.

Sparkling: The Missing App Layer for Lynx.js?

A hands-on look at Sparkling for Lynx.js: CLI, native navigation, and the tooling layer that turns Lynx into a full mobile app framework.

Visualizing the Dual-Thread Model of Lynx JS

A practical look at Lynx JS’s dual-thread runtime, using real examples to show how main and background threads behave under load.

Exploring Lynx JS: From Quick Start to CLI Workflows

Learn how to set up Lynx JS, explore its ecosystem, and use the Community CLI to build native apps with a familiar JavaScript workflow.

How Node-API Works in React Native: A Deep Dive

A closer look at how Node-API works in React Native, covering addon loading, bundling, the host package, and new build tools like cmake-rn and ferric-cli.

Bringing WebAssembly to React Native With Polygen

Discover Polygen, a toolkit that brings WebAssembly to React Native, compiling WASM to C for near-native performance with no runtime overhead.

From Native to Multiplatform Development: Unpacking Kotlin and Compose

Discover how Kotlin Multiplatform, Jetpack Compose, and Compose Multiplatform compare to React Native. Learn their roles, relationships, and use cases.

Sparkling: A New Framework for Lynx

Join the Lynx team live as we explore Sparkling, its boundaries with Lynx, core features, and bootstrap a project from scratch.

Two Threads of Lynx.js Part 2

Learn how Lynx.js uses a dual-threaded model, how its APIs work, and what it means for performance in this live session with Lukasz Chludzinski and Kewin Wereszczynski.

Exploring Lynx.js and Its Two-Thread Runtime

A recap of our live session exploring how Lynx.js splits work across a main thread and a background thread.

React Native at Scale With NFL

Discover how the NFL uses React Native, Expo, and a monorepo to ship apps across iOS, Android, web, and TV with one stack.

Open Mobile Hub: Non-GMS and Cross-Platform Possibilities

When you build applications, do you ever consider users who may not have access to Google Mobile Services? They may not be your target audience now, but it's good to be aware of what options you have in store for non-GMS devices — which is exactly what we're talking about in this episode!

Stepping Into New Dimension With React Native VisionOS

Try immersing yourself in the React Universe with React Native visionOS! Listen about the latest changes in the framework & watch a 3D app demo.

The Hard Way vs. The React Native AI SDK Way: Stop Writing Custom Modules for Every Model

Learn how React Native AI uses a unified provider model to switch between cloud and on-device LLMs without rewriting application logic, enabling reliable AI experiences online and offline.

Build Smarter Apps: Tool Calling & AI Orchestration Explained

Learn how on-device models in React Native can call tools, interact with external APIs, and return structured outputs you can use directly in application logic.

MLC LLM + React Native: On-Device AI Without the Pain

Learn how to run third-party on-device LLMs in React Native using MLC LLM. Choose your models, run them efficiently across platforms, and keep a unified JavaScript API with React Native AI.

February 24, 2026

Intelligent Fallbacks with Apple Intelligence in React Native

Learn how to use Apple’s built-in Foundation Models in React Native apps, reduce memory usage, and enable fast, fully on-device AI with React Native AI Apple.

February 10, 2026

What Is the React Native AI SDK? A Complete Intro & Quickstart

Learn why on-device AI matters for React Native apps, how local LLMs behave offline, and what problems React Native AI is designed to solve from day one.

January 29, 2026

Implementing an Android TurboModule with Kotlin

Learn how to implement a React Native TurboModule on Android, from the TypeScript spec and Codegen to the Kotlin implementation and package registration.

January 19, 2026

Working with Different Threads in Swift TurboModules

Learn how JavaScript, native module, background, and main threads interact in React Native TurboModules, and how to use GCD queues to run async work safely in Swift.

January 9, 2026

How to Add Type-Safe Constants to Swift TurboModules

Learn how to expose typed, immutable constants from a Swift TurboModule using Codegen, and get full end-to-end type safety between native and JavaScript.

December 30, 2025

Adding Event Emitters to Your TurboModule in Swift

Learn how to emit native events from a Swift TurboModule and subscribe to them in JavaScript, including proper memory management and Codegen integration.

December 22, 2025

Writing Your First TurboModule in Swift

Learn how to build a fully working TurboModule in Swift, integrate it with Codegen, and bridge it through Objective‑C inside an Expo app.

//

Cross-Platform

We can help you move
it forward!

At Callstack, we work with companies big and small, pushing React Native everyday.

Check our offer

Code Sharing

Implement effective code-sharing strategies across all platforms to accelerate shipping and reduce code duplication.

Migration to React Native

Plan and execute a migration from native or hybrid stacks to React Native with minimal disruption and clear technical direction.

Desktop App Development

Develop powerful cross-platform desktop applications that work across Linux, Windows and Mac.

Web App Development

Develop powerful cross-platform desktop applications that work across Linux, Windows and Mac.