Hire senior React Native engineers in your time zone.

A senior React Native engineer does more than write shared components. They own the decisions that determine whether the app feels native on both platforms or betrays itself with laggy lists and inconsistent behavior.

On a typical engagement, that ownership looks like:

• Deciding what stays shared versus what needs a platform-specific implementation, and building native modules in Swift or Kotlin when React Native does not cover a requirement
• Managing state with Redux, Zustand, or Context based on actual app complexity, not defaulting to the heaviest option out of habit
• Optimizing list rendering, image loading, and bridge traffic so the app stays smooth on mid-range Android devices, not just the latest iPhone
• Owning the release pipeline for both the App Store and Play Store, including OTA update strategy through Expo or CodePush
• Writing and maintaining a Jest test suite, and setting up CI so regressions get caught before a release goes out
• Working directly with native iOS and Android engineers when a feature needs deeper platform-specific work than a bridge can cleanly provide

The gap between a mid-level and a senior React Native engineer usually shows up in device testing. A mid-level engineer ships a feature that looks fine on their own phone. A senior engineer tests it on a range of real devices and catches the dropped frames, the memory pressure, and the platform inconsistencies before users do.

That judgment is exactly what a structured technical interview and code review are designed to surface before you make an offer.

React Native's core covers navigation and rendering, but a strong hire should be fluent in the tools that surround it in a real production app.

Language and framework
Most modern React Native codebases run on TypeScript for type safety across shared logic, with React's hooks-based patterns carried over directly from web development.

Tooling and build systems
Expo has become the default starting point for new projects, handling much of the native build configuration and offering OTA updates out of the box. Teams that need deeper native customization eventually eject to, or start with, the bare React Native workflow, working directly with Xcode and Android Studio.

State and data
Redux remains common for apps with complex, shared state, while Zustand and React Context cover lighter needs. On the data side, GraphQL or REST APIs are standard, and Firebase is a frequent choice for auth, push notifications, and analytics on smaller apps.

Testing and quality
Jest covers unit and component testing. A real test suite tied into CI is a baseline expectation, especially for apps with complex shared business logic that affects both platforms at once.

Native platform knowledge
Even engineers who write mostly JavaScript need working familiarity with both Xcode and Android Studio, since debugging native module issues, build failures, and platform-specific crashes requires stepping into native tooling directly.

Knowing these tools by name is the easy part. Knowing when to reach for Expo versus bare workflow, or when a feature genuinely needs a native module, is what separates a senior hire from someone who has only built simple, fully-shared screens.

React Native's shallow learning curve for React developers makes it easy to find people who can build a basic screen. It is harder to find engineers who have shipped a cross-platform app that performs well on both iOS and Android under real-world conditions. Here is how to tell the difference in an interview.

Ask for apps they have shipped to both app stores
Good candidates can talk through real platform differences they hit, not just describe a demo app that never left a simulator.

Review how they split shared and platform-specific code
Ask them to describe a feature that needed a native module, and how they built or integrated it.

Check performance habits directly
Ask about a real list rendering or startup time problem they diagnosed, and what they changed to fix it, ideally with numbers before and after.

Probe their release process
Ask about their experience with OTA updates through Expo or CodePush, and how they think about what is safe to ship that way versus what needs a full app store review.

Assess testing habits
Ask what their Jest setup actually covers, and how tests fit into their CI pipeline before code merges.

At BetterEngineer, we run this evaluation before you ever speak to a candidate. Knowing what to check yourself still makes for a sharper interview and a more confident hiring decision.

Quick evaluation checklist:

• Ask for cross-platform apps they have shipped to both the App Store and Play Store
• Review how they structure shared code versus platform-specific code and native modules
• Check performance habits: list virtualization, bridge traffic, and startup time optimization
• Probe a real native module integration they built or debugged
• Assess their release process, including OTA update strategy and App Store or Play Store submission experience