Lead Mobile Engineer (React Native / Expo)

SNI is an IT Outsourcing partner working on global projects including a patient-facing mobile application for iOS and Android integrated into an enterprise Microsoft/.NET ecosystem.

• Extensive commercial experience with React Native, Expo (SDK 50+), and TypeScript on iOS and Android platforms.
• Strong expertise in mobile authentication protocols including OAuth 2.0, OpenID Connect, PKCE, JWT, and Microsoft Entra ID (Azure AD).
• Hands-on experience with React Native WebView integrations, session management, and REST APIs.
• Practical experience configuring push notifications with Azure Notification Hub, APNs, and Firebase Cloud Messaging (FCM).
• Proficiency with EAS Build, EAS Submit, and publishing to App Store Connect and Google Play Console.
• Solid understanding of mobile security and secure storage mechanisms such as Expo SecureStore.
• Strong communication skills for working independently in a distributed team aligned with US business hours.

Nice to have:

• Experience with Azure AD B2C, CIAM solutions, and MSAL for mobile.
• Background in healthcare, regulated software, or patient-facing applications.
• Experience with hybrid architecture combining native apps with WebView-based solutions.
• Prior experience with enterprise authentication and identity management platforms.

• Design and deliver cross-platform mobile applications using React Native, Expo (SDK 50+), TypeScript, and Expo Router.
• Implement OAuth 2.0 / OpenID Connect authentication flows with PKCE, JWT token management, and Microsoft Entra ID (Azure AD).
• Design and execute secure session propagation between the mobile app and web applications integrated via WebViews.
• Configure and maintain push notification services using Azure Notification Hub, APNs, and Firebase Cloud Messaging (FCM).
• Manage deep linking, navigation, app lifecycle, and secure local storage (e.g., Expo SecureStore).
• Set up and maintain automated build and delivery pipelines using EAS Build and EAS Submit.
• Oversee application publishing, release management, and store deployments via App Store Connect and Google Play Console.

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