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2026-06-28·8 min read·58 okunma

Scalable React Native Architecture: Building the Right Folder Structure

How to build a sustainable, modular, and clean folder structure in large-scale React Native projects? A guide to Feature-Based architecture.

React NativeExpoArchitectureTypeScript

The foundation of an application is laid not by the first line of code written, but by the architectural design where you decide how and where that code will live. One of the biggest challenges in mobile app development is complex folder structures that turn into technical debt and become impossible to manage as the project grows.

Especially if you are building a solid boilerplate by bringing together modern and powerful tools (such as Expo, TypeScript, Zustand, TanStack Query, and NativeWind), your folder structure must meet not only today's needs but also tomorrow's scalability requirements.

In this article, we examine a modern file structure based on Feature-Based architecture, which has become an industry standard in large-scale and production-ready React Native projects.

The Anatomy of a Modern Project

While the classic "Layer-first" architecture (having all components in one folder, all hooks in another) works for small projects, it makes context switching difficult as the application grows. Instead, a Feature-Based structure that gathers related logic under a single roof is much more sustainable.

Here is an ideal starting template for a modern Expo + TypeScript project:

text
├── src/
│   ├── app/                    # (Expo Router) Screens and route definitions
│   ├── assets/                 # Static files (Images, fonts, icons)
│   ├── components/             # Universal (Shared) UI components
│   ├── constants/              # Theme, colors, configuration variables
│   ├── features/               # Feature (Domain) based modules
│   ├── hooks/                  # Global custom hooks
│   ├── lib/                    # Third-party library configurations
│   ├── services/               # API clients and external service integrations
│   ├── store/                  # Global state management
│   ├── types/                  # Global TypeScript interfaces and types
│   └── utils/                  # Pure helper functions
├── app.json                    # Expo configuration
├── tailwind.config.js          # NativeWind configuration
├── tsconfig.json               # TypeScript rules
└── package.json                # Dependencies and scripts

In-Depth Look at the Folders

  1. src/app/ (Navigation and Screens) It is the heart of Expo Router's file-based routing system. This folder should only contain the composition of screens and navigation logic. Complex business logic or detailed UI rendering should not be here; this layer is only responsible for calling the relevant feature components and rendering them to the screen.

  2. src/features/ (Domain Logic) This is the most critical folder of the project. We modularize the main features (domains) of the application here, such as auth, profile, cart, dashboard. Each feature is isolated within itself and carries its own dependencies:

text
features/auth/
  ├── components/       # Only auth-related components (e.g., LoginForm)
  ├── hooks/            # Business logic and data fetching (e.g., useLogin, useRegister)
  ├── services/         # Only auth API calls
  └── types.ts          # Types specific to the Auth module

Architecture Note: When using TanStack Query, instead of writing your useQuery and useMutation hooks directly inside components, abstract them in the hooks/ directory under this feature folder. This approach completely separates the UI and data layers.

  1. src/components/ (Universal UI) These are domain-agnostic "dumb" components used everywhere in the application.
  • Examples:
tsx
<Button />
<TextInput />
<Card />
  • If NativeWind is used, you can create a consistent UI language across the entire project by injecting your design system and common Tailwind classes into these components.

  1. src/store/ (Global Durum Yönetimi) Sadece uygulamanın genelini ilgilendiren durumlar (örn: kullanıcının oturum durumu, tema seçimi, genel dil tercihi) burada tutulmalıdır. Zustand gibi hafif ve performanslı araçlarla her bir domain için ayrı slice'lar oluşturmak en iyi pratiktir (örn: useAuthStore, useUIStore).

  2. src/store/ (Global State Management) Only states that concern the entire application (e.g., user's session status, theme selection, general language preference) should be kept here. It is best practice to create separate slices for each domain using lightweight and performant tools like Zustand (e.g., useAuthStore, useUIStore).

  3. src/lib/ (Library Wrappers) These are pure JavaScript/TypeScript functions that have no React or State dependencies and are extremely easy to test (e.g., formatDate.ts, currencyFormatter.ts).

Why Should We Choose This Approach?

  1. Scalability: When a new developer joins the project, they don't have to navigate everywhere in the project to solve an authentication-related issue; they focus directly on the features/auth/ folder.

  2. Reusability: Thanks to the atomic components in the components folder, building new screens becomes as practical as putting together Legos.

  3. Loose Coupling: Since data fetching (TanStack Query), global state (Zustand), and interface (NativeWind) layers are not tightly coupled to each other, future refactor processes are much more painless.

A flawless architecture is a living organism shaped by the team's habits and the nature of the project. Laying a solid foundation at the beginning is the only way to prevent technical bottlenecks in the later stages of the project.

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