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Role: IOS Mobile Engineer - 5908 

Location: Broadway NY (Hybrid) 

Duration: 12 months 

Working Hours: 37.5 hrs/week 

Position 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. 

Key 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. 

Additional Skills and Information:       

• .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 

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.