React Native Picup was developed by our founder as an open-source package that provides a simple interface to integrate native file pickers and upload workflows in React Native apps. The package was designed from the ground up to reduce the complexity of handling file uploads across multiple platforms while enhancing developer productivity.
Handling file uploads in React Native requires combining multiple native modules and managing platform differences manually. This creates a high barrier for developers building mobile apps with file-handling features.
We developed React Native Picup to abstract the complexity and provide an all-in-one solution for file selection and upload with minimal setup, improving developer experience and reliability.
Native file picker integration
Upload workflow implementation
Cross-platform compatibility
Developer productivity tools
Simplified interface design
Multi-platform file handling
Open-source package development
Developing a unified API that could seamlessly handle the significant differences between iOS and Android file systems and permissions models.
Creating robust bridges between React Native JavaScript and native platform code for file operations while maintaining performance and reliability.
Designing an intuitive API that simplified complex file operations while providing sufficient flexibility for diverse use cases.
Implementing efficient handling of large files and multiple simultaneous uploads without compromising application performance or stability.
Developed specialized native modules for iOS and Android that addressed the unique characteristics of each platform's file system and permission model.
Created a consistent JavaScript API that abstracted away platform differences while providing a comprehensive set of file handling capabilities.
Implemented a progressive enhancement approach that provided basic functionality on all devices while enabling advanced features when available.
Developed an extensive testing framework that verified functionality across multiple device types, OS versions, and edge cases.
Created detailed, example-rich documentation with integration guides and troubleshooting information to ensure smooth adoption by the developer community.
Iterated on the design based on community issues and feature requests.
Used native threads and compression where needed to speed up file uploads.
React Native Picup is an open-source library rather than a hosted system: its architecture is a thin, consistent JavaScript API layered over native iOS and Android modules that handle file picking, permissions and upload work. Heavy lifting runs on native threads while the JS surface stays small, so consumer apps integrate pickers and uploads with minimal setup and consistent behaviour across platforms.
A React Native app installs the package, links native code via autolinking or CocoaPods, and calls one API regardless of platform.
A TypeScript-friendly module exposes picker and upload functions with promise-based results, progress events and sensible defaults.
The React Native bridge marshals calls and events between JavaScript and the native modules, keeping payloads small by passing file URIs rather than bytes.
Separate iOS and Android implementations wrap each platform's picker, permission model and file system, hiding their differences from JS.
Uploads run on native background threads with optional compression, concurrency control and retry so large files do not block the UI.
Published to npm with semantic versioning, example app, documentation and a testing matrix across devices and OS versions.
The consumer app calls the picker API; the JS layer validates options and invokes the platform module over the bridge.
The native module requests permissions, presents the system picker and returns file URIs, sizes and MIME types.
The app calls upload with the URIs and a target endpoint; the native pipeline reads files off the main thread.
Optional compression runs natively, then files are sent as multipart requests with bounded concurrency.
Progress and completion events stream back over the bridge emitter so the app can render per-file status.
Transient network errors trigger native retries; final results or normalised errors resolve the JS promise.
Serialising file contents through the React Native bridge is slow and memory-hungry; keeping bytes native and exchanging only URIs and events preserves performance for large files.
iOS and Android differ sharply in pickers, permissions and storage access, so separate native implementations with a shared JS contract were more reliable than a lowest-common-denominator shim.
Core pick-and-upload works on every supported device, while compression and advanced picker options enable only where the OS supports them, avoiding version-gated crashes.
Keeping the pipeline generic multipart HTTP lets teams target their own APIs or presigned storage URLs, which made the package useful across many backends.
“React Native Picup has saved our team countless hours of development time by providing a reliable and easy-to-implement solution for file uploads in our apps.”
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