Sr Software Engineer - Mobile (React Native)

playlist株式会社; United States; On-site; USD 140,000 - 180,000; Full time

Job summary

Playlist is seeking an experienced Mobile Engineer to build and evolve cross-platform experiences using React Native for iOS and Android. You’ll partner with Product, Design, and QA to ship features from ideation through App Store/Play Store releases, ensuring high quality and reliable UX.

You will work across UI, networking, on-device data, and offline strategies, embracing AI-assisted tooling to accelerate delivery while maintaining correctness and performance.

Qualifications

• 5+ years building and shipping cross-platform mobile apps with React Native for large-scale consumer or SaaS products.
• Strong proficiency with TypeScript and JavaScript, including core language fundamentals.
• Deep experience with React Native New Architecture (Fabric, TurboModules, JSI) and Hermes engine.
• Experience with Expo toolchain (Expo Router, EAS Build/Submit) or similar setups.
• Shipping to iOS and Android with knowledge of native modules when needed.
• Experience consuming GraphQL or REST APIs and client data-fetch patterns.
• On-device persistence and offline-first patterns (AsyncStorage/ MMKV/ SQLite/ WatermelonDB).
• Familiarity with MVVM or similar architectures and modular codebases.
• Strong debugging skills with Xcode Instruments and debugger.
• Experience with unit/integration/UI testing and release pipelines.

Responsibilities

• Partner with Product and Design to deliver features from ideation through App Store and Play Store release, iterating based on feedback.
• Own mobile features end-to-end across iOS and Android: UI, state logic, networking, local persistence, and production rollout.
• Build polished, accessible interfaces in React Native with focus on performance and UX quality on both platforms.
• Design and integrate client-side networking against GraphQL/REST APIs, collaborating on schemas and authentication.
• Build reliable in-device data flows: persistence, caching, offline support, and sync.
• Drive engineering excellence and observability through testing, code reviews, crash reporting, and release readiness.
• Leverage AI to accelerate delivery while maintaining correctness and quality.
• Foster a collaborative team culture with autonomy, accountability, and impact.

Skills

React Native

TypeScript

JavaScript

Cross-platform

UX focus

Performance

Testing

Debugging

CI/CD

AI tooling

Tools

Expo

React Navigation

Zustand

TanStack Query

GraphQL

REST

AsyncStorage

MMKV

SQLite

Sentry/Crashlytics

Job description

About the Company:

At Playlist, life's richest moments happen when people step away from screens to move, connect, explore, and play. We're building the definitive platform for intentional living, connecting people with inspiring experiences in fitness, wellness, and beyond. With popular brands like Mindbody and ClassPass, Playlist empowers businesses and individuals, making it effortless for aspirations to become actions. Join us in reshaping technology's role to foster meaningful, real-world connections.

The Role You'll Play

You'll build and evolve cross-platform mobile experiences at Playlist with React Native, shipping customer-facing features to iOS and Android across our consumer apps, from the interface down through networking and on-device data layers. You'll partner closely with Product, Design, and QA to take ideas from concept to production with high quality, reliability, and strong UX. You'll also operate at the edge of what's possible by leveraging AI (LLMs and agentic tooling) to accelerate delivery, improve quality, and push product capabilities forward.

• Partner with Product and Design to deliver features from ideation through App Store and Play Store release, iterating based on feedback and outcomes
• Own mobile features end-to-end across iOS and Android: UI, state and view logic, client networking, local persistence, and production rollout
• Build polished, accessible interfaces in React Native with a strong focus on performance, responsiveness, and UX quality on both platforms
• Design and integrate client-side networking against GraphQL/REST APIs, collaborating on schemas, contracts, authentication, and authorization
• Build reliable data flows on device: persistence, caching, background tasks, offline support, and sync
• Drive engineering excellence and operational health through automated testing, thoughtful code reviews, and strong crash reporting and observability, strengthening logging, error handling, resilience, and release readiness while identifying risks early
• Use AI effectively to move faster without sacrificing correctness: AI-assisted debugging, test generation, accessibility checks, refactors, and design/UX iteration
• Help foster a collaborative team culture that values autonomy, accountability, and impact

What We're Looking For

• 5+ years building and shipping cross-platform mobile applications with React Native for large-scale consumer or SaaS products
• Strong proficiency with TypeScript and JavaScript, including strong fundamentals in the language and ecosystem
• Deep experience with modern React Native, including the New Architecture (Fabric, TurboModules, JSI) and the Hermes engine, plus core React patterns (hooks, composition, state management, render performance)
• Experience with the Expo toolchain (Expo Router, EAS Build/Submit/Update) or comparable bare-workflow and native build setups
• Solid experience shipping to both iOS and Android, including an understanding of platform differences and when to drop down to native code
• Comfort writing or maintaining native modules and bridging to native code (Swift/Objective-C, Kotlin/Java) when the situation calls for it
• Experience consuming GraphQL APIs (schema-driven development, client caching, pagination patterns) and/or well-designed REST APIs, including client data-fetching patterns (e.g., TanStack Query)
• Solid understanding of on-device persistence (e.g., AsyncStorage, MMKV, SQLite, WatermelonDB, or Realm), offline-first patterns, and networked-client fundamentals (timeouts/retries, idempotency, offline handling, graceful degradation)
• Familiarity with app architecture patterns (MVVM, TCA, or similar) and modular, testable codebases
• Solid debugging skills; comfortable using Xcode Instruments (Time Profiler, Allocations, Leaks) and the Xcode debugger
• Experience with testing across the stack: unit, integration, and UI (e.g., XCTest, XCUITest, snapshot testing)
• Experience with the release pipeline: App Store Connect, TestFlight, code signing, and provisioning
• Clear communicator who collaborates effectively across roles and working styles
• AI-native builder mindset with strong ownership and judgment: leverage AI to amplify output and quality, and bring (or quickly build) experience with AI-adjacent systems like evals, guardrails, prompt/tool design, and agentic workflows

Tools and systems

This role is cross-platform mobile with React Native, with ownership across product experiences, client services, and on-device data. You do not need to have used every tool here, but you should be comfortable learning new technologies and choosing the right approach for the problem.

• Languages: TypeScript, JavaScript, with Swift/Objective-C and Kotlin/Java for native modules
• Framework & UI: React Native (New Architecture, Hermes), Expo/Expo Router, React Navigation, Reanimated, Gesture Handler, NativeWind/styled-components, design tokens/component libraries, accessibility
• State & data: Redux Toolkit/Zustand/Jotai, TanStack Query, GraphQL (e.g., Apollo Client) and/or REST, AsyncStorage/MMKV/SQLite/WatermelonDB, secure storage (Keychain/Keystore)
• Runtime & tooling: Metro, Hermes, Xcode, Android Studio, Gradle, CocoaPods, monorepos (Nx/Turborepo), CI/CD
• Testing: unit/integration/e2e testing (Jest, React Native Testing Library, Detox/Maestro) plus native unit/UI tests
• Release & distribution: EAS Build/Submit/Update, Fastlane, App Store Connect, Google Play Console, TestFlight, over-the-air updates (Expo Updates/CodePush), code signing, provisioning
• Observability: crash reporting and monitoring (Sentry/Crashlytics/New Relic or similar), React Native DevTools/Flipper, performance profiling
• AI/LLM tooling & quality/safety: Cursor/Copilot-style IDE assistants; Claude