Mobile App Development

React Native Expertise

Core Development

• Cross-platform development: Single codebase for iOS and Android with platform-specific optimizations

• Modern React Native: Functional components, hooks, TypeScript, and latest React Native features

• Performance optimization: 60fps animations, list virtualization, memory management

• Navigation: React Navigation, tab bars, stack navigation, deep linking

• State management: Redux, Zustand, React Query for mobile apps

• Offline-first architecture: Local storage, sync strategies, optimistic updates

Native Feature Integration

• Push Notifications: Firebase Cloud Messaging, APNs, notification scheduling, deep links

• Geolocation: Real-time location tracking, geofencing, proximity-based features

• Camera & Media: Photo/video capture, image picking, media library access

• Device Features: Biometric authentication, sensors, haptic feedback, calendar integration

• Native Modules: Custom native code integration when React Native APIs aren't sufficient

• Background Tasks: Location tracking, scheduled tasks, background fetch

App Store Expertise

iOS App Store

• Developer Portal Management: Certificates, provisioning profiles, App IDs, entitlements

• App Store Connect: TestFlight beta distribution, app metadata, screenshots, compliance

• Certificate Management: Distribution certificates, push notification certificates, signing

• Submission Process: App review guidelines, common rejection reasons, expedited reviews

• Enterprise Distribution: Custom B2B app distribution for corporate clients

Google Play Store

• Play Console Management: Release tracks, staged rollouts, pre-registration campaigns

• App Signing: App bundles, signing configurations, Google Play App Signing

• Store Listing Optimization: Screenshots, feature graphics, localized descriptions

• Beta Testing: Internal testing, closed testing, open testing tracks

Multi-Country Deployments

• Localization: Multi-language support, RTL layouts, regional content

• Regional Compliance: GDPR, data residency, country-specific regulations

• Coordinated Launches: Simultaneous releases across European markets

• Store Metadata Management: Translated descriptions, localized screenshots, country-specific ASO

Over-The-Air (OTA) Updates

Remote Update Capabilities

• Instant Updates: Deploy bug fixes and features without App Store approval

• CodePush Integration: Microsoft CodePush for instant JavaScript updates

• Expo Updates: Managed update system with rollback capabilities

• Custom Update System: Build custom OTA solutions for enterprise requirements

• Staged Rollouts: Gradual updates to user segments for risk mitigation

• A/B Testing: Deploy different versions to different user groups

What Can Be Updated

• ✅ UI changes and layout modifications

• ✅ Business logic and feature improvements

• ✅ Bug fixes and performance optimizations

• ✅ Content updates (text, images, data)

• ✅ API integration changes

• ❌ Native SDKs code changes (requires App Store update)

Enterprise Case Studies

Vodafone - Music Festival Apps

Solution Delivered:

• Cross-platform iOS and Android apps with Vodafone branding

• Push notifications for campaign announcements and promotions

• Geolocation features for store finder and proximity offers

• Multi-language support (Portuguese, Spanish, English, German)

• Custom enterprise certificates for internal distribution

• Coordinated App Store submissions across 4 countries

Technical Implementation:

• React Native with custom native modules for telecom features

• Firebase for push notifications and analytics

• Mapbox for advanced mapping and geofencing

• OTA updates for campaign content changes

• Offline-first architecture for low connectivity areas

Results:

• Deployed to thousands of users across Europe

• Zero downtime during campaign launches

• Successful expedited App Store reviews for time-sensitive releases

NOS - Music Festivals & Events App

Challenge: Event management app for music festivals and corporate events

Solution Delivered:

• Real-time event schedules with push notifications for updates

• Interactive venue maps with geolocation-based navigation

• Artist profiles and content streaming

• Social features for attendee engagement

• Admin panel for event organizers to update content remotely

Technical Features:

Advanced push notification system with rich media
Background geolocation for proximity-based alerts
Custom UI animations for smooth festival experience
Content caching for offline access
Real-time data synchronization

Scale:

• Handled 50,000+ concurrent users during peak events

• Push notifications to 30,000+ users simultaneously

• Zero crashes during high-traffic festival days

Superbock Group - Brand & Promotions App

Challenge: Consumer engagement app for beverage brand with promotional campaigns

Solution Delivered:

• Product catalog with AR features for label scanning

• Loyalty program with QR code rewards

• Push notifications for limited-time promotions

• Store locator with geolocation

• Social sharing and user-generated content

• Gamification features for user engagement

Technical Highlights:

• React Native with native AR modules (ARKit/ARCore)

• Camera integration for QR scanning and product recognition

• Location services for proximity marketing

• Secure authentication and payment integration

• Remote content updates via OTA

Business Impact:

• High engagement rates during promotional campaigns

• Rapid content updates without app store delays

Serralves - Museum & Events App

Challenge: Cultural institution app for exhibitions, events, and visitor guidance

Solution Delivered:

• Interactive museum guide with audio tours

• Event calendar with ticket purchasing

• Augmented reality features for art installations

• Indoor navigation for museum layout

• Multi-language audio guides (6 languages)

• Push notifications for exhibition openings

Innovative Features:

• Beacon-based indoor positioning for room-by-room guidance

• Audio synchronization with exhibit viewing

• Offline content for entire museum experience

• Accessibility features (VoiceOver, high contrast)

• Rich media gallery with high-resolution artwork

Impact:

• Enhanced visitor experience for thousands of museum guests

• Reduced operational costs (digital vs. physical audio guides)

• Positive feedback from international visitors

Development Process

Phase 1: Planning & Architecture

• Requirements gathering and feature prioritization

• Technical architecture design

• Platform-specific considerations (iOS vs Android differences)

• Third-party service selection (analytics, crash reporting, etc.)

• Timeline and milestone planning

Phase 2: Core Development

• React Native app structure setup

• Navigation implementation

• Core features development

• Native module integration

• API integrations and data layer

• Local storage and offline capabilities

Phase 3: Native Features

• Push notification setup (Firebase/APNs)

• Geolocation implementation

• Camera and media features

• Biometric authentication

• Deep linking and universal links

• Background tasks and services

Phase 4: Polish & Testing

• UI/UX refinement and animations

• Performance optimization

• Testing on real devices (iOS and Android)

• Crash reporting and analytics setup

• Beta testing with TestFlight and Play Console

Phase 5: Deployment

• App Store assets preparation (screenshots, descriptions)

• Certificate and provisioning profile management

• App Store and Play Store submission

• Review process management

• Production release and monitoring

Phase 6: Post-Launch Support

• OTA updates for quick fixes and features

• Push notification campaigns

• Analytics monitoring and optimization

• User feedback incorporation

• Feature additions and improvements

Technical Stack

Core Technologies

• React Native: Latest version with New Architecture support

• TypeScript: Type-safe development

• React Navigation: Native-like navigation patterns

• Expo: When appropriate for faster development (or bare React Native for custom needs)

State Management

• Zustand: Lightweight state management

• React Query: Server state and caching

• AsyncStorage: Persistent local storage

Native Features

• Firebase: Push notifications, analytics, crash reporting, remote config

• Mapbox / Google Maps: Advanced mapping and geolocation

• Camera: Camera and barcode scanning

• Permissions: Permission handling

• Keychain: Secure storage

• Geolocation: Location tracking

Performance & Monitoring

• Sentry: Error tracking and performance monitoring

• Firebase Analytics: User behavior and engagement

• Flipper: Development debugging

• React Native Performance: FPS monitoring and optimization

CI/CD & Distribution

• Fastlane: Automated builds and deployments

• CodePush / Expo Updates: OTA updates

• TestFlight: iOS beta distribution

• Firebase App Distribution: Multi-platform beta testing

App Store Management Services

Certificate & Profile Management

• Developer account setup and configuration

• Certificate generation and renewal

• Provisioning profile management

• Push notification certificate setup

• Enterprise distribution certificates

Submission & Review

• App metadata optimization for ASO

• Screenshot and preview video creation

• App review guidelines compliance

• Handling rejection and resubmission

• Expedited review requests for urgent releases

Ongoing Maintenance

• Version updates and release management

• Crash monitoring and bug fixes

• Performance optimization based on analytics

• User feedback response and feature prioritization

• Compliance with platform policy changes

Ideal For

• Companies needing cross-platform mobile apps (iOS + Android from single codebase)

• Startups wanting rapid mobile app development without native teams

• Enterprises requiring apps with complex native features (geolocation, push, camera)

• Organizations needing multi-country app deployments

• Businesses wanting OTA update capability for rapid iteration

• Products requiring offline-first mobile experiences

Why Choose React Native

✅ Cost Effective: Single codebase for iOS and Android (50% less development time)
✅ Fast Development: Rapid iteration with hot reload and extensive libraries
✅ Native Performance: Near-native performance with optimization
✅ Large Ecosystem: Huge community, packages, and tooling
✅ Easy Maintenance: One team maintains both platforms
✅ OTA Updates: Deploy fixes without App Store approval
✅ Proven Scale: Used by Facebook, Instagram, Airbnb, Microsoft, and thousands more

Deliverables

• Production-ready iOS and Android applications

• App Store and Play Store submissions

• Developer account setup and management

• Push notification infrastructure

• OTA update system implementation

• Analytics and crash reporting setup

• Documentation (technical docs, deployment guides)

• Source code and CI/CD configuration

• Beta testing setup (TestFlight, Play Console)

• Post-launch support and maintenance plan

Engagement Models

• Full App Development: Complete app from concept to store deployment

• Feature Addition: Add native features to existing React Native apps

• App Store Management: Handle submissions, updates, and compliance

• Migration to React Native: Convert existing native apps to React Native

• Technical Consulting: Architecture review and optimization

• Ongoing Maintenance: Monthly retainer for updates and support

Real-World Expertise

Having deployed apps for major brands (Vodafone, NOS, Superbock, Galp, Serralves), I understand:

• Enterprise requirements and compliance needs

• Multi-country coordination and localization

• High-traffic event apps (festivals, campaigns)

• Complex integrations (payments, loyalty, AR)

• App Store policies and approval strategies

• Security and data protection for sensitive apps

I don't just build apps, I navigate the entire mobile ecosystem to ensure your app succeeds.

Ready to discuss your mobile app project?

Let's talk about your requirements, timeline, and how React Native can bring your app to life on iOS and Android.