Senior iOS Developer
Idexcel
Job Description
Job Title: Senior iOS Developer (Native iOS Mobile App + AWS)
\nLocation: Washington, DC / Hybrid
\nDuration: 12+ Months
\n \nJob Overview
\nDesign, build, and support native iOS frontline applications and the cloud services they consume.
\nThe 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.
\n \nKey Responsibilities
\nDevelop and maintain native iOS features using Swift and applicable Objective-C
\nImplement ticket scan/search, passenger and manifest presentation, ancillary identification, check-in/lift workflows, and safe transaction-state transitions.
\nMaintain 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).
\nIntegrate iOS clients with AMG/BFF REST APIs using approved OAuth/OIDC flows, secure storage, request correlation, and defensive error handling.
\nBuild reusable JSON/configuration-driven UI elements, forms, role-targeted surveys, and feature-flagged behaviors where approved.
\nImprove performance, accessibility, lifecycle/threading safety, crash resilience, and usability on supported iPhone/iPad generations.
\nInstrument workflows with Dynatrace mobile RUM, privacy controls, crash symbolization, and measurable performance telemetry.
\nPartner with backend developers on contract tests, API evolution, idempotency, and synchronized mobile/server data models.
\n \nRequired Skills
\nExperience with AWS API Gateway, Lambda, ECS Fargate, Cognito/Entra identity, or Spring Boot APIs.
\nExperience with Ditto/peer synchronization, Core Data, Bluetooth peripherals or barcode scanning hardware.
\nExperience with Dynatrace RUM, accessibility/VoiceOver, App Intents/Shortcuts, or enterprise MDM deployment.
\nFamiliarity with reservation, transportation, retail ticketing, or other high-availability frontline systems.
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