Shared React knowledge
Reuses hooks, TypeScript types, validation schemas and API clients from your web codebase, often through a monorepo package.
Hire · React Native
Senior React Native engineers who slot into a team that already speaks React, reuse its TypeScript habits and own the mobile app from JavaScript bundle to signed binary. Shortlisted engineers have been paid to write a Turbo Module, profile a slow list on Hermes and plan an over-the-air update.
Paid exercise with a Turbo Module
Senior and lead engineers, plus architects
Comfortable in Expo and bare projects
On your team
Reuses hooks, TypeScript types, validation schemas and API clients from your web codebase, often through a monorepo package.
Keeps the app on Fabric and Turbo Modules, checks third-party libraries for compatibility and removes old bridge assumptions.
Writes typed Turbo Modules or Expo Modules in Swift and Kotlin when no maintained library covers a device feature.
Uses FlashList or tuned FlatList, Reanimated worklets and Gesture Handler so interactions run off the JavaScript thread.
Runs EAS Build or Fastlane, manages runtime versions and publishes over-the-air fixes within store rules.
The strongest argument for this hire is organisational. When your web engineers already think in components, hooks and TypeScript, a React Native developer can review their code, borrow their utilities and hand work back and forth. That only pays off if the person you hire actively builds those bridges, so ask how they shared code in their last role.
Vetting
Strict types across navigation params and API responses, memoisation where profiling justifies it, and predictable effects.
Config plugins, prebuild and continuous native generation, and knowing when ejecting to a bare project is warranted.
Bytecode precompilation, reading Hermes sampling profiles and trimming bundle size to shorten time to interactive.
Writing TypeScript specs that Codegen turns into native interfaces, and understanding synchronous calls over JSI.
React Navigation or Expo Router with typed routes, universal links, Android App Links and authenticated deep link handling.
Jest with React Native Testing Library, Detox or Maestro for flows, and React Native DevTools for inspection.
Work sample
The candidate profiles a feed on Hermes, identifies wasted renders and image decoding, and brings scrolling back to smooth.
They write a small Turbo Module or Expo Module with a TypeScript spec, implemented in Swift and Kotlin, inside a paid one-day exercise.
They extract a validation and data-fetching hook so the same code serves a web form and a mobile screen.
A call on runtime versions, staged update channels, rollback and what an over-the-air update must not change under store policies.
Levels
Owns screens and native integrations in an existing React Native app and reviews TypeScript across web and mobile.
Sets monorepo structure, upgrade cadence, update policy and CI for both platforms, and coordinates with web leads.
Plans brownfield integration into existing native apps, new architecture migration and how much code web and mobile should share.
A senior fits a working app that needs more feature output. A lead is the right call when upgrades have stalled several versions behind or nobody owns the update channel policy. An architect helps when you are embedding React Native screens into an existing native app or deciding how far a monorepo should go.
Other options
Without existing React skills the shared-knowledge advantage disappears, and Flutter may be the cleaner cross-platform choice.
Open registerIf your product is already a web app and native features are light, an Ionic and Capacitor developer may get you there sooner.
Open registerFor background-heavy or hardware-specific Android behaviour, hire a Kotlin specialist.
Open registerFabric and Turbo Modules are now the default, and many older libraries assumed the asynchronous bridge. A capable candidate can tell you how they audited dependencies, which ones they replaced and how Codegen specs changed their native code. Vague answers here usually mean they have only worked on an older app.
Ask about Hermes as well: how they read a profile and what actually moved startup time.
Have the new engineer produce a development build for both platforms and push a harmless update through your preview channel in the first week. Next, give them a feature that touches a native capability, so you see whether they reach for a maintained library, an Expo Module or their own Turbo Module, and why.
FAQ
For most new apps, yes; development builds and config plugins remove the old limits. A bare project still makes sense when you maintain substantial custom native code or a brownfield integration, and a lead can judge which applies.
Business logic, types, schemas and API clients share well. UI components share less, though React Native Web or a common design token package can close some of the gap.
Changing JavaScript and assets is permitted within limits, but an update should not alter the app’s primary purpose or add native code. Engineers we place know where those lines are and version runtimes accordingly.
Works alongside
Share component logic, design tokens and API hooks with the web team so features land on both surfaces together.
Open registerTake on heavy native work such as extensions, CarPlay or custom media pipelines that sit outside JavaScript.
Open registerOwn signing secrets, build caching and pipelines that produce both store binaries and update bundles.
Open registerProduct delivery
Primary sources
Dated official documentation, standards, and research that support the factual claims on this page.
Official overview of Fabric, Turbo Modules and JSI.
How over-the-air updates, channels and runtime versions work.
How to read this page
Scope, cost and timeline figures are planning guidance until confirmed in a written proposal. Diagrams and screens are illustrations, not client deliverables, and source-code rights and handover follow the signed agreement. See the delivery process and the full disclaimer.
Next decision
Define outcomes, constraints, evidence, rights and handover before delivery begins.
Commercial rights, repositories, environments, documentation, acceptance and handover remain contract-defined.