iOS Developer

Below is the job description for the position. Position Title- 3- Sr. Native iOS Mobile Application Developer with (AWS/Dynatrace Exp)Location- Washington, DCDuration- 12 + months of Contract with more extension Mode of interview- Telephonic/Skype Client – Direct Client Remote but as long as they can come DC on need basis and attend the important SAFe ceremonies like PI onsite.Job OverviewDesign, build, and support native iOS frontline applications and the cloud services they consume. The position focuses on reliable passenger-facing operational workflows, offline transaction continuity, secure mobile integrations, and reusable app components that serve conductors and station/onboard employees.Key ResponsibilitiesDevelop and maintain native iOS features using Swift and applicable Objective-C Implement ticket scan/search, passenger and manifest presentation, ancillary identification, check-in/lift workflows, and safe transaction-state transitions.Maintain offline-first data storage, local transaction queues, conflict handling, reconnection/replay, and approved peer-to-peer synchronization patterns (e.g., Ditto/Infinite PeerConnect where used).Integrate iOS clients with AMG/BFF REST APIs using approved OAuth/OIDC flows, secure storage, request correlation, and defensive error handling.Build reusable JSON/configuration-driven UI elements, forms, role-targeted surveys, and feature-flagged behaviors where approved.Improve performance, accessibility, lifecycle/threading safety, crash resilience, and usability on supported iPhone/iPad generations.Instrument workflows with Dynatrace mobile RUM, privacy controls, crash symbolization, and measurable performance telemetry.Partner with backend developers on contract tests, API evolution, idempotency, and synchronized mobile/server data models.Required Skills Experience with AWS API Gateway, Lambda, ECS Fargate, Cognito/Entra identity, or Spring Boot APIs.Experience with Ditto/peer synchronization, Core Data, Bluetooth peripherals or barcode scanning hardware.Experience with Dynatrace RUM, accessibility/VoiceOver, App Intents/Shortcuts, or enterprise MDM deployment.Familiarity with reservation, transportation, retail ticketing, or other high-availability frontline systems