React Native Mobile Developer

About the role

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a React Native Mobile Developer based in Brazil.

Join a fast-growing engineering environment building proprietary mobile technology for field marketing and sales teams across the United States. As a senior contributor within a growing mobile engineering team, you will develop and maintain cross-platform applications for iOS and Android. You will take ownership of end-to-end feature delivery while shaping the architecture of new mobile initiatives. A key focus will be building reliable offline-first experiences that support field personnel working in areas with limited connectivity. Working with React Native, Expo, Supabase, and HubSpot integrations, you will help connect mobile workflows with enterprise systems. You will also contribute to an AI-first development culture, using advanced coding tools to accelerate delivery while maintaining high engineering standards. This is a fully remote opportunity offering significant technical ownership and collaboration with product and backend engineering teams.

Accountabilities You will own the development, architecture, and release of high-quality mobile applications, ensuring reliable performance across devices and connectivity conditions. Your responsibilities will include:

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Design, develop, and maintain cross-platform iOS and Android applications using React Native, TypeScript, and Expo.

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Architect and implement offline-first capabilities, including local data persistence, caching, background synchronization, conflict resolution, and retry/backoff strategies.

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Work with local storage and database technologies such as SQLite, MMKV, and WatermelonDB to support dependable field operations.

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Lead architectural decisions for new greenfield mobile projects while improving design patterns and maintainability across existing applications.

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Use agentic AI development tools to accelerate implementation, carefully reviewing and validating generated code before deployment.

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Integrate mobile applications with Supabase, including Postgres, Row-Level Security policies, and Realtime subscriptions, as well as custom production systems and third-party APIs such as HubSpot CRM.

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Collaborate with backend engineers and product leads to define efficient data models and type-safe API contracts.

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Manage the complete mobile release lifecycle, including provisioning profiles, certificates, build channels, TestFlight, and Google Play Console releases.

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Configure and maintain crash monitoring, performance tracing, and release-health telemetry using tools such as Sentry and Firebase Crashlytics.

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Investigate issues below the React Native abstraction layer by analyzing native crash logs in Xcode and Android Studio, and developing or modifying native modules when necessary.