Title: Senior iOS Application Engineer/.net Developer

Location : 2 Broadway, NYC, NY (Hybrid) (Need Only Nj/NY Candidates)

Exp : 10+ Years

Client : MTA

Visa: Noh1b, OPT, CPT

Rate: $70/hr C2C

In Person Interview (No exception for virtual) so local people will work mostly

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.

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.

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