Callstack • Jul 17, 2025

Build and Run Node API Modules in React Native

Article Summary

Running Node.js APIs directly inside React Native apps just became possible. This changes how we think about code reuse between mobile and backend.

Callstack's engineering team explores a breakthrough capability in React Native: executing Node API modules natively within mobile apps. This opens new possibilities for sharing logic between server and mobile codebases without traditional bridging overhead.

Key Takeaways

Node API modules can now run directly in React Native environments
Eliminates traditional native bridge overhead for certain use cases
Enables true code sharing between backend Node.js and mobile apps
Works with React Native's New Architecture for better performance

Critical Insight

Developers can now leverage existing Node.js modules in React Native apps without rewriting them for mobile platforms.

The article reveals specific implementation patterns that make this work seamlessly with both Expo and bare React Native projects.

About This Article

Problem

Developers had to write the same business logic twice when they wanted to share code between Node.js backends and React Native apps. Each platform needed its own separate implementation.

Solution

Callstack's team found a way to run Node API modules directly inside React Native by using the New Architecture. This meant they could skip the traditional native bridge layer entirely.

Impact

Now developers can take existing Node.js modules and use them in mobile apps without rewriting anything for each platform. This saves time and keeps the logic consistent between the backend and mobile code.