React Native Mobile Developer

Jobgether; Brasil; Remote; BRL 276,000 - 331,000; Full time

Benefits offered by this job

Monthly compensation USD 5,000

Semi-monthly pay

Full-time, 40h/wk

100% remote from LATAM

Independent contractor engagement

Technical ownership in mobile tech

Job summary

Jobgether is partnering with a U.S.-focused team to hire a React Native Mobile Developer in Brazil. You will own end‑to‑end mobile feature delivery, architecture, offline-first capabilities, and enterprise integrations in a fully remote setup.

Expect collaboration with product and backend teams, plus a strong emphasis on AI-assisted development practices. The role requires 7+ years in mobile development (4+ in React Native), deep TypeScript/ES6 proficiency, Expo experience, and hands-on work

Qualifications

• 7+ years of professional mobile development experience, with 4+ years in React Native.
• Strong TypeScript, React hooks, and modern ES6+ JavaScript proficiency.
• Experience with state management and data-fetching libraries; TanStack Query preferred.
• Proficiency with Expo across development, builds, and release channels.
• Proven offline-first mobile architectures with local databases and synchronization.
• Experience with Supabase or Postgres-backed platforms and Realtime subscriptions.
• Familiarity with native iOS/Android tooling (Xcode, Android Studio) and app store submissions.
• Experience using AI coding tools and validating generated code.
• Experience writing unit, component, and end-to-end tests (Vitest, RTL, Detox).
• Excellent English communication; able to participate in architecture reviews.
• Willingness to work 40 hours Mon-Fri with overlap to US time zones.

Responsibilities

• Design, develop, and maintain cross-platform iOS/Android apps using React Native, TypeScript, and Expo.
• Architect offline-first capabilities including local storage, caching, and data synchronization.
• Work with SQLite, MMKV, WatermelonDB for reliable field operations.
• Lead architectural decisions for new mobile projects and improve patterns across apps.
• Leverage AI tooling to accelerate implementation while validating generated code.
• Integrate with Supabase, Postgres, and HubSpot; define data models and API contracts.
• Collaborate with backend engineers and product leads on data models and APIs.
• Manage mobile release lifecycle (provisioning, certificates, builds, TestFlight, Google Play).
• Set up crash monitoring and telemetry (Sentry, Firebase Crashlytics).
• Investigate native issues via Xcode/Android Studio crash logs and modify native modules as needed.
• Write and maintain unit, component, and end-to-end tests.

Skills

React Native

TypeScript

Expo

AI coding tools

Unit testing

Tools

Expo

Supabase

HubSpot

Xcode

Android Studio

Vitest

Detox

React Testing Library

Job description

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:

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

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

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

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

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

• 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.

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

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

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

• 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.

• Write and maintain unit, component, and end-to-end tests to ensure application reliability and quality.

Requirements

The ideal candidate brings extensive professional mobile engineering experience, strong architectural judgment, and the ability to work independently in a fast-paced, AI-enabled development environment. The following qualifications are required:

• At least 7 years of professional mobile development experience, including 4+ years working with React Native in production environments.

• Advanced proficiency in TypeScript, React hooks, and modern ES6+ JavaScript.

• Experience with state management and data-fetching libraries; TanStack Query is strongly preferred.

• Hands-on expertise with Expo across application development, builds, deployment, device management, and release channels.

• Proven experience designing and delivering offline-first mobile architectures, including local databases, background synchronization, and data conflict resolution.

• Production experience with Supabase or other Postgres-backed platforms, particularly Row-Level Security policies and Realtime subscriptions.

• Strong knowledge of native mobile development environments, including Xcode, Android Studio, native crash logs, and App Store and Google Play submissions.

• Experience managing application reviews and resolving App Store or Google Play submission rejections.

• Demonstrated ability to use AI coding tools effectively while rigorously validating generated code.

• Experience writing unit, component, and end-to-end tests using tools such as Vitest, React Testing Library, and Detox.

• Excellent written and spoken English, with the ability to contribute actively to technical architecture reviews and product discussions.

• Availability for a 40-hour workweek, Monday through Friday, with at least six hours of daily overlap with US Pacific Time business hours and the ability to work until at least 2:00 PM PT. Collaboration with US Eastern Time schedules is also required.

• A high-performance macOS development computer capable of running iOS simulators and Android emulators concurrently.

• A professional remote workspace with an HD webcam, noise-canceling headset, and enterprise-grade high-speed internet connection.

Additional experience that would be advantageous includes:

• Expo Application Services (EAS), Expo Router, expo-updates, over-the-air deployments, and React Native's New Architecture, including Fabric and TurboModules.

• Zustand, tRPC, Drizzle ORM, Zod, and NativeWind or Tailwind CSS.

• Location-based mobile features such as react-native-maps, background location tracking, geofencing, push notifications, and QR code scanning.

Benefits

• Monthly compensation of USD $5,000.

• Paid semi-monthly.

• Full-time, 40-hour workweek.

• 100% remote work from Latin America.

• Independent contractor engagement.

• Significant technical ownership and influence over mobile architecture.

• Opportunity to work with modern mobile technologies, Supabase, enterprise integrations, and AI-assisted development workflows.

• Collaboration with a growing engineering team on applications used by field marketing and sales professionals.

How Jobgether works:

We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team.

We appreciate your interest and wish you the best!

Data Privacy Notice:

By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.