iOS Developer

Infojini Inc; Washington (District of Columbia); Hybrid; USD 120,000 - 190,000; Full time

Job summary

Infojini Inc. is seeking a Sr. Native iOS Mobile Application Developer with AWS and Dynatrace experience in Washington, DC. The role involves building and supporting frontline iOS applications and their cloud services, focusing on reliable passenger workflows and secure mobile integrations.

You will implement offline-first data handling, peer-to-peer synchronization, and reusable UI components, while collaborating with backend teams to ensure API consistency and performance across devices.

Qualifications

• Proficiency in native iOS development with Swift and Objective-C.
• Experience with AWS API Gateway, Lambda, ECS Fargate, Cognito or similar services.
• Dynatrace RUM and accessibility testing experience.
• Experience with offline-first data handling and Core Data.

Responsibilities

• Develop and maintain native iOS features using Swift and Objective-C.
• Implement ticket scanning, passenger/manifest presentation, and safe transaction-state transitions.
• Maintain offline data storage, queues, conflict handling, and peer-to-peer sync patterns such as Ditto/Infinite PeerConnect.
• Integrate iOS clients with REST APIs using OAuth/OIDC and secure storage.
• Create reusable JSON/configuration-driven UI elements and feature-flagged behaviors.
• Improve performance, accessibility, and crash resilience on supported devices.
• Instrument workflows with Dynatrace mobile RUM and telemetry.
• Collaborate with backend teams on API evolution and data models.

Skills

Swift/Obj-C

AWS API Gateway

Dynatrace RUM

OAuth/OIDC REST

Tools

Core Data

Bluetooth/barcode hardware

MDM deployment

REST APIs

Job description

Below is the job description for the position.

Position Title- 3- Sr. Native iOS Mobile Application Developer with (AWS/Dynatrace Exp)

Location- Washington, DC

Duration- 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 Overview

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.

Key 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