One Codebase. Two Platforms. Faster Launch.

We write every React Native project in TypeScript, never plain JavaScript. TypeScript's static type system catches type errors at compile time, makes API response contracts explicit, improves IDE autocomplete and refactoring support, and makes the codebase dramatically easier to onboard new engineers to. We use strict mode TypeScript with no-explicit-any and all recommended compiler checks enabled.

React Navigation is the de facto standard for React Native routing. Version 7 introduces the Static API for simpler type-safe route definitions, improved deep linking support, and better TypeScript integration. We implement stack navigators, tab navigators, drawer navigators, and nested navigators with proper back stack management on both iOS and Android.

For complex global state like authenticated user data, cart state, and multi-step form flows, we use Redux Toolkit with Redux Persist for state hydration from storage. For simpler apps or feature-level local state, we use Zustand — a lightweight, hook-based store that eliminates Redux boilerplate while still being highly testable and DevTools-compatible.

TanStack Query (formerly React Query) handles all server state — API caching, background refetching, pagination, optimistic updates, and mutation state — cleanly separated from UI state. This eliminates large volumes of manual loading, error, and caching logic that clutters codebases relying on useEffect for data fetching, and dramatically improves perceived performance through stale-while-revalidate caching.

We use Axios for HTTP requests with a configured interceptor layer that handles authentication token injection, token refresh on 401 responses, request retry logic, and error transformation. All API calls are typed with TypeScript generics so response shapes are validated at compile time, not discovered at runtime in production.

MMKV is a high-performance key-value storage library by WeChat that is 30x faster than AsyncStorage for synchronous reads, making it ideal for user preferences, session tokens, and feature flags. For complex relational local data requiring queries and relationships, we use WatermelonDB, the only local database built specifically for React Native performance at scale.