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React Native · Mobile UI at native speed

What are your React Native best practices?

Mediumbest practicesarchitecturemaintainabilityUpdated Oct 2026
Quiz this track

Short answer

Keep a predictable project structure, use TypeScript at boundaries, scope state and effects carefully, design for offline and accessibility, test critical flows, and keep dependencies and native toolchains current.

Best practices are mostly about reducing the cost of change. A React Native app spans JavaScript, iOS and Android, so unclear boundaries and stale dependencies become expensive quickly.

The practices I apply consistently

  • Feature-based structure with screens, components, hooks and data modules close together
  • TypeScript at API, navigation and storage boundaries, with runtime validation for external data
  • Small, focused components and custom hooks instead of large screen files
  • State scoped to where it is used; server data in a query cache
  • Accessibility props on interactive elements and support for large text
  • A test suite that covers logic, key components and a few critical device flows
  • Performance budgets checked on a mid-range Android device
  • A dependency and React Native upgrade cadence rather than a yearly big-bang migration
text
src/
  features/
    checkout/
      screens/
      components/
      hooks/
      api.ts
  components/
  lib/
  navigation/
  theme/
Feature folders keep related code together and make deletion straightforward.

Accessibility is a good example of a practice that must be built in, not added at the end. Every Pressable needs a role and label, images need alt text or should be hidden, and layouts must survive large font scaling. Retrofitting those across a large app is much harder than starting with them.

Avoid pinning ancient versions of React Native to dodge upgrades. The longer you wait, the more native changes, deprecated APIs and dependency conflicts accumulate, and the riskier the eventual migration becomes.

Follow-ups you should expect

Interviewers use these to check whether the first answer was understanding or memorisation.

  1. 1How do you structure a large React Native codebase?
  2. 2How often do you upgrade React Native?
  3. 3How do you build accessibility into the workflow?
  4. 4Which metrics tell you the app is healthy?

Say it in the interview

I optimise for change: a feature-based structure, TypeScript at the boundaries, small components and scoped state. I build in accessibility, offline behaviour and testing from the start rather than retrofitting them, and I keep a regular upgrade cadence so native and dependency changes do not pile up. I also measure performance on a mid-range Android device, because that is where regressions show up first.

Use this as a model, not a script. Saying it in your own words is what makes it survive follow-up pressure.

Related questions

MediumHow do you test a React Native app?MediumHow do you choose a state management approach in React Native?MediumWhat security concerns matter in a React Native app?

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