React Native Developer

Firma apreel powstała w kwietniu 2010 roku. W miarę rozwoju firmy i równolegle ze wzrostem poziomu zaufania klientów, jej działalność poszerzyła się o usługi Outsourcingu Specjalistów IT. Dziś to właśnie ten obszar stanowi główny filar działalności apreel.

Must-have skills:

• 5+ years mobile development, of which 3+ years React Native in production
• React Native bridgeless mode + Hermes — production experience
• JSI / Nitro Modules — built or maintained at least one native module bridge in production
• TypeScript strict mode — generics, narrowing, no any-as-escape
• State management with Zustand (or comparable: Redux Toolkit, Jotai)
• TanStack Query / React Query at production scale
• Reanimated 4 + gesture-handler — building actual animated UIs
• Auth0 mobile SDK or comparable OIDC mobile flow
• iOS native integration — Xcode comfort, Swift/Objective-C reading, CocoaPods, app provisioning, TestFlight
• Android native integration — Android Studio comfort, Gradle, Kotlin reading
• App-store deploy pipelines — Fastlane, Bitrise, or EAS Build
• Crash analytics — Firebase Crashlytics or comparable
• Working English

Nice to have:

• Skia / GPU rendering in RN
• NativeWind or Tailwind-for-RN
• Bluetooth Low Energy (BLE) integration in RN
• HealthKit / Health Connect integration
• Experience working with a multi-platform native SDK
• Performance profiling with Flipper or RN Performance Monitor
• E2E testing on mobile (Detox, Maestro)

First 90 days:

• Read and document the mobile codebase alongside the outgoing engineering team
• Produce a quality baseline: TypeScript strictness compliance, test coverage, dependency freshness, app size, cold-start time, frame-rate profile
• Audit the JSI / Nitro Module bridges — especially the bridge into the Kotlin fitness-equipment SDK
• Identify the riskiest screens and flows; propose stabilization plans
• Lead knowledge-transfer sessions for the mobile app

Ongoing:

• Own architecture decisions for the mobile app
• Lead design reviews for new screens and flows
• Pair with mid-level mobile engineers
• Manage app-store release pipelines
• Participate in on-call rotation for mobile-side crashes