Mobile Developer (React Native) - BR

About Fluxicart

Fluxicart is a white-label multi-tenant marketplace platform that empowers merchants to create their own fully customized online stores (themes, domains, branding) while operating under a centralized platform that manages payments, deliveries, commissions, and administrative dashboards.

We are building the "Shopify + iFood + Production System" for the European market, starting with Portugal and expanding to Ireland, the UK, and beyond.

Our stack is modern and ambitious:

• Current: Next.js 15 (App Router) + React 19 + TypeScript + Prisma + SQLite/PostgreSQL
• Future: Migrating to microservices with Rust (Axum) + gRPC + NATS + Redis
• Mobile: React Native + Expo for the Fluxiway rider delivery app

We are backed by a clear product vision, an active user base, and a roadmap that includes international expansion, WebSocket real-time features, and high-performance Rust microservices.

The Role

We are looking for a Mobile Developer with deep expertise in React Native to build and maintain the Fluxiway rider delivery app.

In this role, you will:

• Build and maintain the Fluxiway rider app (React Native + Expo)
• Implement real-time order tracking with WebSockets and geolocation
• Build offline-first features for riders in areas with poor connectivity
• Integrate with REST APIs and WebSockets for real-time updates
• Implement push notifications for order assignments and status changes
• Build file upload features for rider documents (RG, CNH, CRLV, vehicle photos)
• Implement geolocation features — matching riders to orders based on distance (Haversine formula)
• Create smooth animations and intuitive UX for the rider onboarding flow (7 steps)
• Collaborate with the backend team (Rust) to design APIs for the mobile app
• Ensure offline capability with local storage (AsyncStorage, SQLite)
• Optimize app performance — smooth scrolling, fast renders, minimal battery drain

You'll have a direct impact on the product and the company's growth — we're a flat team where engineers ship fast, learn continuously, and shape the product roadmap.

Key Responsibilities

Mobile Development (70%)

• Build and maintain the Fluxiway rider app with React Native + Expo
• Implement 7-step onboarding flow: Phone Verification → Personal Info → Address → Password → Vehicle Selection → Document Upload → Complete
• Implement real-time order feed — riders see nearby orders and can accept/reject
• Build GPS tracking — riders share their location in real-time
• Implement order lifecycle — view order details, navigate to pickup, confirm delivery
• Build profile management — edit personal info, vehicle details, documents
• Implement push notifications — new order alerts, status updates, system announcements
• Build offline-first capability — store data locally when offline, sync when back online
• Create beautiful, performant UI with animations and gestures

Integration & APIs (20%)

• Integrate with REST APIs (Auth, Orders, Riders, Logistics)
• Implement WebSocket connections for real-time updates (order assignments, status changes)
• Work with geolocation APIs (Google Maps, Mapbox, or Apple Maps)
• Implement file uploads for rider documents (expo-document-picker, expo-image-picker)
• Integrate push notifications (Expo Notifications, Firebase Cloud Messaging)
• Handle offline synchronization with AsyncStorage or SQLite

Architecture & Strategy (10%)

• Design state management for complex rider workflows (Zustand, Redux Toolkit, or Jotai)
• Implement navigation architecture (React Navigation)
• Design offline-first strategy with conflict resolution
• Optimize battery usage — efficient GPS tracking, background location updates
• Implement error tracking and crash reporting (Sentry)
• Set up CI/CD for mobile apps (Expo EAS Build, App Store Connect, Google Play Console)

Requirements

Must-Have

Requirement Details:

Experience: 3+ years of mobile development, 2+ years with React Native.

React Native: Expert-level hooks, navigation, native modules, performance optimization.

Expo: Experience with Expo ecosystem (EAS Build, EAS Submit, Expo Router).

TypeScript: Strong TypeScript skills.

REST APIs: Experience with API integration (fetch, axios, TanStack Query).

WebSockets: Real-time communication (Socket.io, or native WebSocket)/

Geolocation: Location services, GPS tracking, background location (expo-location).

Push Notifications: Expo Notifications or FCM/APNs.

State Management: Zustand, Redux Toolkit, or Jotai.

Navigation: React Navigation (Native Stack, Tabs, Drawer).

File Uploads: expo-document-picker, expo-image-picker, expo-file-system.

Offline Storage: AsyncStorage, SQLite, or MMKV.

Version Control: Git, GitHub, PR workflows.

Nice-to-Have

Requirement Details:

Android/iOS Native: Native modules (Swift/Kotlin) for performance-critical features.

Maps Integration: Google Maps, Mapbox, or Apple Maps SDKs.

Background Tasks

expo-background-fetch, expo-task-manager

Deep Linking: expo-linking, URL schemes.

App Deployment: Experience deploying to App Store and Google Play.

Mobile Testing: Detox, Maestro, or React Native Testing Library.

E-commerce/Delivery: Prior experience in delivery apps, ride-sharing, or logistics.

Reanimated: React Native Reanimated for complex animations.

Gesture Handler: React Native Gesture Handler.