Bring your existing native libraries into your React Native app
We help you integrate C-compatible libraries (C, C++, Golang, Rust) you already use in your business into your React Native codebase. Reuse proven business logic without rewriting it in JavaScript.
Why integrate existing C++ libraries instead of rewriting in JavaScript?
Rewriting tested, production-grade native code is slow, risky, and often results in worse performance. Native integration preserves your investment while extending reach.
Protect your investment
Years of battle-tested business logic does not need to be rewritten. Wrap it and use it.
Protect your investment
Years of battle-tested business logic does not need to be rewritten. Wrap it and use it.
Keep native performance
C-compatible languages run faster and use less memory than JavaScript for compute-heavy operations.
Keep native performance
C-compatible languages run faster and use less memory than JavaScript for compute-heavy operations.
Ship faster
Integration takes weeks. Rewriting takes months, with new bugs included.
Ship faster
Integration takes weeks. Rewriting takes months, with new bugs included.
Your native library, ready to use in React Native
A documented, maintained, and type-safe JavaScript package that exposes your library to any React Native project.
Type-safe npm package
Your library wrapped in a documented JavaScript module with full TypeScript types. Use it like any other npm dependency.
Cross-platform support
One integration that works across iOS, Android, web, TV, and even VR/AR platforms.
Platform-specific adjustments
We adapt your library for each platform's runtime environment and constraints.
Performance instrumentation
Built-in monitoring to ensure your library performs well in the new mobile context.
Bridgeless architecture
Integration built on React Native's new architecture for better performance and simpler maintenance.
No rewrite required
Keep your existing native core and expose it cleanly to JavaScript instead of reimplementing domain logic.
Superfast Nitro Modules with Marc Rousavy
In this podcast episode, Marc Rousavy breaks down how Nitro Modules push React Native performance by reducing native-JavaScript overhead and using architecture patterns built for speed.
- How Nitro Modules use JSI and C++ to reduce bridge overhead in hot paths.
- Practical module design patterns for high throughput and low latency.
- What to measure to validate performance gains in production apps.
Integrate your existing C++ libraries with React Native
Wrap your library for React Native
We create a type-safe JavaScript interface to your C-compatible library using React Native's new architecture.
Adapt for target platforms
We adjust your library's build and runtime behavior for iOS, Android, web, TV, and other platforms you support.
Instrument for performance
We add monitoring so you can verify your library performs well in the mobile context.
Document and maintain
We deliver documentation and maintenance guidelines so your team can extend the integration over time.
Have a native library you need in your React Native app?
Why leading companies work with Callstack
Meta Official Partners
We are official Meta partner for React Native, co-organizers of React Conf and hosts of React Universe Conf.
Working at scale
We know how to make React Native work at enterprise scale, both technically and organizationally.
React Native Core Contributors
We don’t just use React Native to build cross-platform apps, we help shape it for millions of developers.
Team at scale
We’re a team of 200+ engineers ready to start fast and scale with your needs.
Enterprise-friendly
We hold ISO certifications and follow strict security standards to make onboarding smooth and compliant.
Wide range of services
As a partner for your full application lifecycle, we offer a full range of services around React and React Native.
FAQs
Integrating native libraries raises questions about compatibility, performance, and maintenance. Here are answers to the ones we hear most.
Any C-compatible library, including C, C++, Golang, Rust, and others that expose a C ABI.
Yes. We build integrations using bridgeless, new-architecture patterns for better performance and maintainability.
Weeks, not months. Exact timing depends on your library complexity and target platforms.
Often, yes. If your library can compile to WebAssembly or has a web-compatible build, we can support web alongside mobile.
We design integrations to make version updates straightforward, with clear upgrade paths.
We recommend the new architecture, but can support older versions if your project requires it.
No. We wrap your existing native library and expose it safely to React Native.
Have a native library you need in your React Native app?
We integrate C-compatible libraries into React Native with full type safety, cross-platform support, and new architecture compatibility. Your proven code, now in your mobile app.
We’ve helped dozens of teams go cross-platform without rewriting everything. Let's see how we can help you.
