Senior iOS Application Engineer

Location: 2 Broadway, NY, NY – 3 days on site or as needed. Duration: 1 year. Interview mode: phone then video.

About the role

The Senior iOS Application Engineer will support the design, development, enhancement, integration, testing, deployment, and production support of the E-Citations mobile application. Work closely with Product, Engineering, Architecture, Cybersecurity, Infrastructure, and business stakeholders to deliver secure, reliable, high-performance functionality for field operations. Apply deep hands-on .NET MAUI/iOS engineering expertise to independently deliver complex application enhancements in an enterprise environment. Combine strong problem-solving skills with a focus on scalability, performance, and security.

Responsibilities

• Design, develop, enhance, and support the E-Citations iOS application using .NET MAUI and C#.
• Build secure, scalable, high-performance mobile functionality using .NET MAUI, XAML, and native iOS APIs where required.
• Develop offline-first capabilities: local storage (e.g., SQLite), caching, background sync, retry logic, conflict resolution, and offline/online reconciliation.
• Integrate securely with REST/GraphQL APIs, .NET backend services, Azure services, relational databases, and enterprise systems.
• Develop and support Bluetooth/BLE integrations—including Zebra ZQ-series mobile printers—with robust connection recovery and error handling.
• Implement camera, photo capture, barcode scanning, OCR, document scanning, and identity workflows using .NET MAUI and native iOS capabilities.
• Implement secure authentication and data protection using OAuth 2.0, OIDC, JWT, Keychain, encryption, certificate pinning, and secure local storage.
• Develop responsive, accessible, field-friendly UIs optimized for rapid operational workflows.
• Perform unit, integration, regression, UI, and performance testing; troubleshoot application, connectivity, integration, and production issues.
• Support CI/CD pipelines, automated builds, provisioning, code signing, release workflows, telemetry, and production monitoring.
• Participate in Agile delivery: estimation, code reviews, demos, and release planning.
• Maintain technical documentation for developed features, integrations, deployment, and operational support.

Requirements

• Extensive hands-on experience developing enterprise mobile applications using .NET MAUI and C# for iOS.
• Strong experience with XAML, .NET MAUI Community Toolkit, .NET MAUI Essentials, MVVM, Clean Architecture, and dependency injection.
• Experience building offline-first mobile applications using SQLite, local caching, synchronization, retry, and conflict-resolution patterns.
• Hands-on experience with Bluetooth/BLE and Zebra mobile printers (especially ZQ-series) and Zebra SDK integration.
• Strong experience integrating mobile apps with REST/GraphQL APIs, .NET/ASP.NET Core services, Azure, SQL Server, and Azure SQL.
• Experience integrating .NET MAUI apps with native iOS frameworks and platform-specific APIs where needed.
• Strong knowledge of enterprise security: OAuth, OIDC, JWT, Keychain, encryption, certificate pinning, and application hardening.
• Experience with enterprise MDM platforms: Microsoft Intune, Workspace ONE/AirWatch, or Jamf.
• Strong experience with Git, GitHub/GitLab, CI/CD (Jenkins/Bitrise), automated testing, provisioning, and code signing.
• Knowledge of App Store Connect, APNs, telemetry, crash reporting, diagnostics, and application monitoring.
• Strong troubleshooting, collaboration, and independent execution skills within complex enterprise environments.

Preferred Experience

• Experience supporting public-sector, public-safety, transportation, enforcement, citation, or field-workforce applications—especially those involving:
• Mobile printing
• Offline operation
• Secure enterprise integration
• Mission-critical field usage