Senior iOS Application Developer – Enterprise Mobility

COGENT Infotech; Washington (District of Columbia); Hybrid; USD 120,000 - 160,000; Full time

Job summary

Cogent Infotech invites applications for a Senior iOS Application Developer – Enterprise Mobility in Washington, DC. You will design, build, and support native iOS front-line applications and the cloud services they consume, focusing on reliable passenger workflows, offline transactions, and secure mobile integrations.

The role requires hands-on experience with Swift/Objective-C, REST APIs, OAuth/OIDC, and high-availability frontline systems.

Qualifications

• Experience with native iOS development using Swift and Objective-C.
• Hands-on experience with RESTful APIs and OAuth/OIDC authentication flows.
• Familiarity with iOS performance, accessibility, and offline capabilities.
• Experience with high-availability frontline systems in transportation or retail contexts.

Responsibilities

• Develop and maintain native iOS features using Swift and Objective-C.
• Implement ticket scan/search, passenger and manifest presentation, and check-in workflows.
• Maintain offline storage, local queues, and synchronization patterns.
• Integrate iOS clients with REST APIs and secure storage with proper error handling.
• Build reusable UI elements and feature-flagged behaviors.
• Improve performance, accessibility, and crash resilience on iPhone/iPad.

Skills

Swift

Objective-C

REST APIs

OAuth/OIDC

Dynatrace RUM

Accessibility

Tools

AWS API Gateway

AWS Lambda

ECS Fargate

Cognito/Entra

Spring Boot

Ditto/Peer Sync

Core Data

Bluetooth/Barcode Scanning

Enterprise MDM

Xcode

Job description

Title: Senior iOS Application Developer – Enterprise Mobility

Location: Washington, DC (Hybrid)

Duration: 12 months contract

About Cogent Infotech

At Cogent Infotech, we believe in creating opportunities that empower individuals and transform organizations. With over 23 years of excellence in consulting and talent solutions, we pride ourselves on building inclusive workplaces and driving innovation in everything we do. Our diverse teams bring unique perspectives to help deliver cutting-edge solutions to global clients across both public and private sectors.

Position Summary

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-Financial 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 Qualifications and 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.

Equal Opportunity & Inclusion Statement

Cogent Infotech is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment where everyone feels welcome and valued. We encourage applications from individuals of all backgrounds, identities, abilities, and experiences. If you’re excited about this role but don’t meet every requirement, we still encourage you to apply

Join Us

At Cogent Infotech, your ideas matter. Join a purpose-driven organization that celebrates diversity, encourages collaboration, and invests in your future.