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Brainspack LLP

React Native Development Services

Maintaining separate iOS and Android codebases doesn't just double your costs - it introduces divergence, delays, and the constant risk that a feature works on one platform and breaks on the other. At Brainspack, we build React Native applications that share a single, clean JavaScript codebase across both platforms while delivering the native performance and platform-specific feel your users expect. Real navigation, real native modules, real performance - not a web wrapper pretending to be an app. And we stay with you after launch, because mobile development doesn't stop when the app goes live.

React Native Development Solutions For Real Business Problems

Every React Native project we build starts with the specific mobile problem the business is facing - budget constraints from maintaining two native codebases, slow release cycles, inconsistent experience across platforms, or an existing app that's become expensive to maintain. We solve those problems.

React Native development capabilities across iOS, Android, and cross-platform delivery

Cross-Platform React Native Development

A React Native app that feels slightly wrong on iOS because it was built by developers who were thinking in Android terms - or vice versa - loses user trust immediately. Platform conventions matter. We build React Native applications that feel genuinely native on both iOS and Android: proper navigation patterns for each platform, correct gesture handling, platform-specific component variants where needed, and a shared business logic layer that keeps the codebase unified without forcing a lowest-common-denominator UI.

React Native Performance Optimisation

A React Native app that feels sluggish - slow navigation transitions, list scroll performance issues, large bundle sizes causing long cold start times, JavaScript thread blocking causing UI freezes - is damaging user retention. We profile using Flipper and the React Native performance monitor to identify exactly where the bottlenecks are, then fix them: Hermes engine optimisation, FlatList configuration, Reanimated for UI-thread animations, and Metro bundle configuration for startup performance.

App Testing & Store Submission

App Store and Play Store rejections after development is complete are expensive and frustrating - and almost always avoidable with the right process. We test across real iOS and Android devices covering your actual user base, run compliance reviews before submission, handle both store submissions, and manage the back-and-forth with reviewers if issues arise. Your launch is planned, not scrambled.

React Native UI/UX Design

React Native gives you the capability to build beautiful mobile interfaces. Generic component library implementations don't give you the actuality. We design custom React Native interfaces built on your brand - expressive, performant, and designed around the real interaction patterns of mobile users on both platforms. Smooth animations with Reanimated, custom gesture handling, and interfaces that feel premium, not assembled.

Native Module Integration

When your React Native app needs to access device capabilities that don't have JavaScript bridge equivalents - Bluetooth, NFC, custom camera processing, biometric authentication, platform-specific SDKs - the bridge needs to be built carefully or it becomes a performance and stability liability. We build and integrate custom native modules in Swift/Objective-C for iOS and Kotlin/Java for Android, giving your React Native app access to the full native capability of each platform without compromising the shared codebase architecture.

React Native App Maintenance

A new iOS major version that changes navigation behaviour. A React Native upgrade that requires native module updates. A third-party library that drops maintenance and needs replacing. These are the recurring realities of mobile app ownership. Our maintenance plans cover OS compatibility updates, React Native version management, dependency audits, and rapid response when something breaks in production.

Technologies We Use

We build React Native applications with TypeScript as the default, React Navigation for routing (with platform-appropriate navigation patterns), Redux Toolkit or Zustand for state management, and React Query for server state. For animations and gestures, we use React Native Reanimated and React Native Gesture Handler - both UI-thread based, not JavaScript-thread based, which is the difference between smooth and janky. Firebase for backend services and push notifications, Fastlane for automated store builds and deployment, and Bitrise or GitHub Actions for CI/CD. Every tool documented. Everything handed over.

  • React Native
  • TypeScript
  • React Navigation
  • Redux Toolkit
  • Reanimated
  • Fastlane

Our Proven React Native Development Process

Too many React Native projects fail not because the technology doesn't work, but because the problem wasn't properly defined, the data wasn't ready, or the solution was built in isolation from the people who'd actually use it. Our process is built to avoid all three.

Planning

Platform requirements, core user flows, native module needs, and performance targets defined before design or development. iOS and Android considered from the first conversation.

Design

Platform-aware UI design - correct navigation patterns, gesture conventions, and visual treatment for iOS and Android, within a consistent brand identity.

Development

TypeScript-first, clean architecture, platform-specific adaptations handled deliberately. Weekly updates and direct access to your project lead throughout.

QA & Launch

Real device testing across the target user base, with both store submissions and compliance fully handled. We launch only when the app is genuinely production ready.

Maintenance

OS updates, React Native version management, dependency health, and feature development. One team, both platforms, long-term accountability.

Why Businesses Choose Brainspack for React Native Development

One Codebase, Both Platforms

Feature parity across iOS and Android without the overhead of separate teams and separate release cycles.

Real Device Testing

Not emulators. We test on the actual device range your users own - so your users don't discover the problems we missed.

End-to-End Delivery

Design, development, testing, store submission, and post-launch support - one team, complete accountability.

Performance Without Compromise

Reanimated for UI-thread animations, proper FlatList configuration, Hermes engine - performance is built in, not optimised after complaints.

You Own the Code

TypeScript, clean architecture, full documentation, handover training. Any React Native developer can pick up and continue what we've built.

People Also Ask

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Tell us what you need. You get a written scope, a realistic timeline, and a fixed quote before any code is written.