Role: Senior iOS Application Engineer Location: 2 Broadway, New York, NY (Hybrid - 3 days on site or as needed) Duration: Long TermPosition Overview: The Senior iOS Application Engineer / Consultant will support the design, development, enhancement, integration, testing, deployment, and production support of the E-Citations mobile application.
The consultant will work closely with Product, Engineering, Architecture, Cybersecurity, Infrastructure, and business stakeholders to deliver secure, reliable, high-performance functionality for field operations.
This role requires deep hands-on .NET MAUI/iOS engineering expertise, strong problem-solving skills, and the ability to independently deliver complex application enhancements within an enterprise environment.
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, including local storage, caching, background synchronization, 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, connection recovery, and printer staterror handling.
- Implement camera, photo capture, barcode scanning, OCR, document scanning, and identity-related 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 interfaces optimized for rapid operational workflows.
- Perform unit, integration, regression, UI, and performance testing; troubleshoot application, connectivity, integration, and production issues.
- Support CI/CD, automated builds, provisioning, code signing, release workflows, telemetry, and production support.
- Participate in Agile delivery, estimation, code reviews, demonstrations, and release planning.
- Maintain technical documentation for developed functionality, integrations, deployment, and operational support.
Required Skills & Experience: - 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, preferably including Zebra ZQ-series printers and Zebra SDK integration.
- Strong experience integrating mobile applications with REST/GraphQL APIs, .NET/ASP.NET Core services, Azure, SQL Server, and Azure SQL.
- Experience integrating .NET MAUI applications with native iOS frameworks and platform-specific APIs where required.
- Strong knowledge of enterprise security including OAuth, OIDC, JWT, Keychain, encryption, certificate pinning, and application hardening.
- Experience with enterprise MDM platforms such as Microsoft Intune, Workspace ONE/AirWatch, or Jamf.
- Strong experience with Git, GitHub/GitLab, CI/CD, Jenkins/Bitrise, automated testing, provisioning and 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, particularly solutions involving mobile printing, offline operation, secure enterprise integration, and mission-critical field usage.
- .NET MAUI / C# iOS Application Development
- iOS Platform Integration / Native iOS APIs
- Offline-First Mobile Architecture & Synchronization
- Bluetooth / BLE & Zebra Mobile Printer Integration
- REST / GraphQL API & .NET Backend Integration
- Mobile Security, Authentication & Encryption
- Azure Services / SQL Server / Azure SQL Integration
- Mobile Testing, Debugging & Performance Optimization
- CI/CD, Code Signing, Provisioning & TestFlight
- Camera, Barcode Scanning, OCR & Document Capture
- Enterprise MDM - Intune / Workspace ONE / Jamf
- MVVM, Clean Architecture & Modular Application Design
- Mobile Telemetry, Crash Reporting & Production Support
- Accessible / Field-Oriented Mobile UI Development
- Git / GitHub / GitLab / Jenkins / Bitrise.
Required Additional Skills: - Application Development - 6+ years of experience
- Field Service - 6+ years of experience
- Production - 6+ years of experience
- Testing and Development - 6+ years of experience
- Web Development/Design - 6+ years of experience
- .NET Framework - 6+ years of experience
- Visual Studio - 6+ years of experience
- .NET Code Development - 6+ years of experience
- Developing/Executing Test Plans - 6+ years of experience
- GUI Design in a .NET Framework - 6+ years of experience
- Product Development - 6+ years of experience
- Rapid Prototyping System Development - 6+ years of experience
- User Interface Design - 6+ years of experience
- Wireless/Mobile Development - 6+ years of experience
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