{"id":1815033,"url":"https://alion.io/job/tri-force-consulting-services-senior-ios-application-engineer-5908-1","title":"Senior iOS Application Engineer-5908-1","company":{"id":3856821,"name":"Tri-Force Consulting Services","domain":"triforce-inc.com","url":"https://alion.io/company/tri-force-consulting-services","size_band":"11-50","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"Zoho Recruit","truth_index":null},"role":"Mobile","role_family":"Mobile","seniority":"senior","employment_type":"contractor","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["New York, United 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Injection","optional":false},{"name":"Git","optional":false},{"name":"GitHub","optional":false},{"name":"GitLab","optional":false},{"name":"GraphQL","optional":false},{"name":"Jenkins","optional":false},{"name":"MAUI","optional":false},{"name":"MVVM","optional":false},{"name":"OCR","optional":false},{"name":"Offline-First","optional":false},{"name":"Push Notifications","optional":false},{"name":"Rest API","optional":false},{"name":"SQL","optional":false},{"name":"SQLite","optional":false}],"status":"live","first_seen_at":"2026-10-03T23:47:12Z","employer_posted_date":"2026-10-03","last_verified_at":"2026-10-21T02:09:46Z","board_verified":true,"closed_at":null,"days_open":17,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":17},"description":"Name of position: Senior iOS Application Engineer-5908-1\nLocation: 2 Broadway - MTA Headquarters NY \nNote: Hybrid role with 3 days on-site\nPosition Overview\nThe Senior iOS Application Engineer / Consultant will support the design, development, enhancement, integration, testing, deployment, and production support of the E-Citations mobile application.\nThe consultant will work closely with Product, Engineering, Architecture, Cybersecurity, Infrastructure, and business stakeholders to deliver secure, reliable, high-performance functionality for field operations.\nThis 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.\nKey Responsibilities\n\nDesign, develop, enhance, and support the E-Citations iOS application using .NET MAUI and C#.\nBuild secure, scalable, high-performance mobile functionality using .NET MAUI, XAML, and native iOS APIs where required.\nDevelop offline-first capabilities, including local storage, caching, background synchronization, retry logic, conflict resolution, and offline/online reconciliation.\nIntegrate securely with REST/GraphQL APIs, .NET backend services, Azure services, relational databases, and enterprise systems.\nDevelop and support Bluetooth/BLE integrations, including Zebra ZQ-series mobile printers, connection recovery, and printer status/error handling.\nImplement camera, photo capture, barcode scanning, OCR, document scanning, and identity-related workflows using .NET MAUI and native iOS capabilities.\nImplement secure authentication and data protection using OAuth 2.0, OIDC, JWT, Keychain, encryption, certificate pinning, and secure local storage.\nDevelop responsive, accessible, field-friendly interfaces optimized for rapid operational workflows.\nPerform unit, integration, regression, UI, and performance testing; troubleshoot application, connectivity, integration, and production issues.\nSupport CI/CD, automated builds, provisioning, code signing, release workflows, telemetry, and production support.\nParticipate in Agile delivery, estimation, code reviews, demonstrations, and release planning.\nMaintain technical documentation for developed functionality, integrations, deployment, and operational support.\nRequired Skills & Experience\n\nExtensive hands-on experience developing enterprise mobile applications using .NET MAUI and C# for iOS.\nStrong experience with XAML, .NET MAUI Community Toolkit, .NET MAUI Essentials, MVVM, Clean Architecture, and dependency injection.\nExperience building offline-first mobile applications using SQLite, local caching, synchronization, retry, and conflict-resolution patterns.\nHands-on experience with Bluetooth/BLE and Zebra mobile printers, preferably including Zebra ZQ-series printers and Zebra SDK integration.\nStrong experience integrating mobile applications with REST/GraphQL APIs, .NET/ASP.NET Core services, Azure, SQL Server, and Azure SQL.\nExperience integrating .NET MAUI applications with native iOS frameworks and platform-specific APIs where required.\nStrong knowledge of enterprise security including OAuth, OIDC, JWT, Keychain, encryption, certificate pinning, and application hardening.\nExperience with enterprise MDM platforms such as Microsoft Intune, Workspace ONE/AirWatch, or Jamf.\nStrong experience with Git, GitHub/GitLab, CI/CD, Jenkins/Bitrise, automated testing, provisioning and signing.\nKnowledge of App Store Connect, APNs, telemetry, crash reporting, diagnostics, and application monitoring.\nStrong troubleshooting, collaboration, and independent execution skills within complex enterprise environments.\nPreferred Experience\nExperience 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 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