Senior iOS Application Engineer

ZealHire Inc.; New York (NY); Hybrid; USD 125,000 - 155,000; Full time

Job summary

ZealHire Inc. in New York seeks a Senior iOS Application Engineer to design, develop, and maintain the E-Citations mobile app using .NET MAUI and C#. The role emphasizes offline-first mobile capability, secure integrations with REST/ GraphQL backends, and collaboration with product, architecture, and security teams.

You will work on secure authentication, Keychain, and printer integrations (Zebra), delivering high-performance solutions in an enterprise setting with a hybrid work model in NYC.

Qualifications

• Extensive hands-on experience developing enterprise mobile apps with .NET MAUI and C# for iOS.
• Strong knowledge of XAML, MVVM, Clean Architecture, and dependency injection.
• Experience building offline-first apps using SQLite, caching, synchronization and conflict resolution.
• Experience with Bluetooth/BLE and Zebra printers; Zebra SDK integration is a plus.
• Strong integration with REST/GraphQL, .NET/ASP.NET Core services, Azure, SQL Server.
• Experience integrating MAUI apps with native iOS frameworks and security features.
• Security expertise: OAuth, OIDC, JWT, Keychain, encryption and certificate pinning.
• Experience with Git, CI/CD, automated testing, and provisioning.
• Familiarity with App Store Connect, telemetry, crash reporting and diagnostics.
• Ability to work independently within complex enterprise environments.

Responsibilities

• Design, develop, enhance, and support the E-Citations iOS app using .NET MAUI and C#.
• Implement offline-first functionality with local storage and sync.
• Integrate securely with REST/GraphQL, Azure, and enterprise backends.
• Support CI/CD, code signing, release workflows, and telemetry.
• Collaborate with product, security, and engineering stakeholders.

Skills

.NET MAUI

C#

XAML

MVVM

OAuth/JWT

Bluetooth/BLE

REST/GraphQL

Azure SQL

CI/CD

App Store Connect

Zebra SDK

Git

Tools

Zebra SDK

Git

Job description

Senior iOS Application Engineer | JPC-8600

Role: Senior iOS Application Engineer
Location: New York, NY (Hybrid) (Local candidates)
Duration: 12 Months

USC, GC, H4-EAD (only genuine profiles please )

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 status/error 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.
• 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

$000,000 – $000,000 Salary range is not shown on the candidate portal