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React Native Architecture by amey-thakur

Name: React Native Architecture
Author: Amey-Thakur

React Native Architecture

Structure React Native apps around clear native-module boundaries and decide honestly when RN fits. Use when starting or auditing a React Native codebase, or weighing RN against fully native development.

Amey-Thakur 0a3f49c 2.7 KB Updated Sep 17, 2026

File contents

React Native architecture

React Native earns its keep when one product team ships two platforms with mostly shared UI logic. The architecture question is always the same: what lives in JavaScript, what lives native, and how thin is the bridge between them.

Method

Decide fit before structure. RN fits content- and form-driven apps with shared business logic. It fights you on heavy real-time graphics, background-centric apps (tracking, audio), and deep OS integration on day one. If the roadmap is 30%+ platform-specific capability, budget for native engineers regardless.
Keep the JS/native boundary explicit and small. Wrap every native capability in one typed TypeScript module (src/native/), with its TurboModule or Nitro module behind it. UI code imports the wrapper, never the module directly; when implementations change, one file changes.
Choose libraries by maintenance reality. Navigation: react navigation (JS-driven) unless you need native stack behavior everywhere. Lists: FlashList over FlatList for anything long. Animations: reanimated, which runs on the UI thread. Every native dependency you add is a build-breakage subscription; prefer JS-only where performance allows.
Isolate platform divergence. Component.ios.tsx / Component.android.tsx for small forks; a platform/ capability layer when behavior differs structurally (permissions, files, notifications). Scattered Platform.OS === "ios" conditionals are the smell to refactor.
Respect the threading model. JS runs on one thread: no JSON parsing of megabyte payloads or sync storage reads during interaction. Push heavy work behind InteractionManager, into reanimated worklets, or into a native module that does the work off-thread.
Wire the escape hatches early. Crash reporting that symbolicates both JS and native stacks, and an over-the-air update service for JS-only fixes, with the store-policy limits understood. Retrofitting either after the first incident is twice the work.

Boundaries

RN does not remove the need to understand iOS and Android; it changes how often you touch them.
Brownfield embedding (RN screens inside an existing native app) is a different architecture with its own lifecycle bridging; do not apply this layout blindly there.
Expo's managed workflow accelerates the first year; audit its native module coverage against your roadmap before committing.

---name: react-native-architecturedescription: Structure React Native apps around clear native-module boundaries and decide honestly when RN fits. Use when starting or auditing a React Native codebase, or weighing RN against fully native development.---# React Native architectureReact Native earns its keep when one product team ships two platforms withmostly shared UI logic. The architecture question is always the same: whatlives in JavaScript, what lives native, and how thin is the bridge betweenthem.## Method1. **Decide fit before structure.** RN fits content- and form-driven apps with shared business logic. It fights you on heavy real-time graphics, background-centric apps (tracking, audio), and deep OS integration on day one. If the roadmap is 30%+ platform-specific capability, budget for native engineers regardless.2. **Keep the JS/native boundary explicit and small.** Wrap every native capability in one typed TypeScript module (`src/native/`), with its TurboModule or Nitro module behind it. UI code imports the wrapper, never the module directly; when implementations change, one file changes.3. **Choose libraries by maintenance reality.** Navigation: react navigation (JS-driven) unless you need native stack behavior everywhere. Lists: FlashList over FlatList for anything long. Animations: reanimated, which runs on the UI thread. Every native dependency you add is a build-breakage subscription; prefer JS-only where performance allows.4. **Isolate platform divergence.** `Component.ios.tsx` / `Component.android.tsx` for small forks; a `platform/` capability layer when behavior differs structurally (permissions, files, notifications). Scattered `Platform.OS === "ios"` conditionals are the smell to refactor.5. **Respect the threading model.** JS runs on one thread: no JSON parsing of megabyte payloads or sync storage reads during interaction. Push heavy work behind `InteractionManager`, into reanimated worklets, or into a native module that does the work off-thread.6. **Wire the escape hatches early.** Crash reporting that symbolicates both JS and native stacks, and an over-the-air update service for JS-only fixes, with the store-policy limits understood. Retrofitting either after the first incident is twice the work.## Boundaries- RN does not remove the need to understand iOS and Android; it changes how often you touch them.- Brownfield embedding (RN screens inside an existing native app) is a different architecture with its own lifecycle bridging; do not apply this layout blindly there.- Expo's managed workflow accelerates the first year; audit its native module coverage against your roadmap before committing.

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