Senior IOS Developer

Project overview

Job Title: Senior IOS Developer

Design, 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.

Responsibilities

Develop 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.

About IDEXCEL, INC

Idexcel is an IT services organization, with a mission to bring great people and great organizations together. Our diverse client base represents a wide range of industries, including technology, telecom, insurance, healthcare, manufacturing, banking & financial services, food & commodities trading and federal organizations. Our teams of experienced recruiters directly work with client companies seeking exceptional people to help with their business initiatives. Idexcel, Inc. is an Equal Opportunity Employer.

Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, age, disability, military status, national origin or any other characteristic protected under federal, state, or applicable local law.

Job Facts: Contract W2 | Contract Independent | Contract Corp To Corp | 12 Months | Hybrid | $50+

Skills: Swift, Objective-C, iOS Development, Senior iOS Developer, Senior iOS Engineer, Senior iOS Software Engineer, Native iOS Applications, Mobile Application Development, iPhone, iPad, Core Data, Offline-First Architecture, Offline Data Storage, Local Persistence, Local Transaction Queues, Transaction Management, Transaction Replay, Conflict Resolution, Data Synchronization, Peer-to-Peer Synchronization, Ditto, Infinite PeerConnect, REST API, RESTful APIs, JSON, AMG, Backend for Frontend, BFF, API Integration, AWS API Gateway, AWS Lambda, Amazon ECS Fargate, AWS, Amazon Cognito, Microsoft Entra ID, OAuth 2.0, OpenID Connect, OIDC, Spring Boot, Secure Storage, iOS Keychain, Authentication, Authorization, Token Management, API Error Handling, Request Correlation, Idempotency, API Contract Testing, API Versioning, Backend Integration, Mobile Backend Integration, Distributed Systems, Eventual Consistency, Transaction State Management, Ticket Scanning, Barcode Scanning, Barcode Scanner Integration, Bluetooth Peripherals, Passenger Management, Passenger Manifests, Ticketing Systems, Reservation Systems, Transportation Systems, Railway Applications, Frontline Applications, Check-In Workflows, Ancillary Identification, Lift Workflows, Operational Workflows, High-Availability Systems, Enterprise Mobility, Enterprise iOS Applications, Reusable UI Components, JSON-Driven UI, Configuration-Driven UI, Dynamic Forms, Role-Based UI, Role-Targeted Surveys, Feature Flags, Dynatrace, Dynatrace Mobile RUM, Real User Monitoring, Mobile Application Monitoring, Performance Optimization, Crash Reporting, Crash Symbolication, Crash Resilience, Application Lifecycle Management, Thread Safety, Concurrency, Multithreading, Accessibility, VoiceOver, App Intents, Siri Shortcuts, Apple Shortcuts, Mobile Security, Data Privacy, Telemetry, Production Support, Mobile Application Testing, Integration Testing, Mobile Architecture, Enterprise Application Development, Mobile Device Management, MDM, Agile, CI/CD, Production iOS Development, Senior Mobile Developer, Senior Mobile Engineer, iOS Application Engineer, Mobile Software Engineer, Native Mobile Development

Reference: Dice Id: eveva001 | Position Id: IDXL_BH_IO1104

Project details

Washington, DC / Hybrid

12+ Months

• Start: flexible
• Duration: 12 Months
• Remote: hybrid
• Location: Washington D.C., DC, US, US
• Rate: 60-75 EUR/h