Senior iOS Application Engineer

Job Description

Role: Senior iOS Application Engineer

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Location: 2 Broadway, New York, NY (Hybrid - 3 days on site or as needed)

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Duration: Long Term

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Position Overview:

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The Senior iOS Application Engineer / Consultant will support the design, development, enhancement, integration, testing, deployment, and production support of the E-Citations mobile application.

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The consultant will work closely with Product, Engineering, Architecture, Cybersecurity, Infrastructure, and business stakeholders to deliver secure, reliable, high-performance functionality for field operations.

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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.

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Responsibilities:

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

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

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• 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.
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• .NET MAUI / C# iOS Application Development
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• iOS Platform Integration / Native iOS APIs
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• Offline-First Mobile Architecture & Synchronization
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• Bluetooth / BLE & Zebra Mobile Printer Integration
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• REST / GraphQL API & .NET Backend Integration
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• Mobile Security, Authentication & Encryption
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• Azure Services / SQL Server / Azure SQL Integration
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• Mobile Testing, Debugging & Performance Optimization
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• CI/CD, Code Signing, Provisioning & TestFlight
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• Camera, Barcode Scanning, OCR & Document Capture
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• Enterprise MDM – Intune / Workspace ONE / Jamf
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• MVVM, Clean Architecture & Modular Application Design
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• Mobile Telemetry, Crash Reporting & Production Support
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• Accessible / Field-Oriented Mobile UI Development
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• Git / GitHub / GitLab / Jenkins / Bitrise.
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Required Additional Skills:

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• Application Development – 6+ years of experience
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• Field Service – 6+ years of experience
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• Production – 6+ years of experience
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• Testing and Development – 6+ years of experience
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• Web Development/Design – 6+ years of experience
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• .NET Framework – 6+ years of experience
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• Visual Studio – 6+ years of experience
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• .NET Code Development – 6+ years of experience
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• Developing/Executing Test Plans – 6+ years of experience
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• GUI Design in a .NET Framework – 6+ years of experience
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• Product Development – 6+ years of experience
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• Rapid Prototyping System Development – 6+ years of experience
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• User Interface Design – 6+ years of experience
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• Wireless/Mobile Development – 6+ years of experience
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