Senior Software Engineer - iOS; Mobile, Bluetooth Printing, Secure Field App

Senior Software Engineer - iOS (Mobile, Bluetooth Printing, Secure Field App)

Product Director, Legal, Safety, and Risk

LOCATION:

2 Broadway, New York, NY 10004

HOURS OF WORK:

9:00 am - 5:30 pm (7.5 hours/day) or as required

This position is eligible for telework, which is currently 2 days per week. New hires are eligible to apply 30 days after their effective date of hire.

Opening

The Metropolitan Transportation Authority is North America's largest transportation network, serving a population of 15.3 million people across a 5,000-square-mile travel area surrounding New York City, Long Island, southeastern New York State, and Connecticut. The MTA network comprises the nation’s largest bus fleet and more subway and commuter rail cars than all other U.S. transit systems combined. MTA strives to provide a safe and reliable commute, excellent customer service, and rewarding opportunities.

About Us

The MTA transportation network has a very large system and infrastructure for financial, business, automated train, transportation, power, and physical security. The MTA IT Department is centrally responsible for providing a full range of Information and Operational Technology services to the MTA agencies and administrative units through its operating and support units. Services are provided on a 7/24/365 basis in support of the MTA organization and its ridership.

MTA IT’s Product Development group is empowered, multi-functional teams focused on the end-to-end management of development products from strategy to delivery. Using innovative processes and tools, the teams are responsible for developing and maintaining highly effective, secure, and innovative transportation, operational, and back-end information systems to support MTA goals and priorities.

Summary

Leads requirements management, software design, and engineering, and testing activities across all stages and iterations of medium complexity software development. Role is responsible for using defined models, methods, and tools. May own medium impact/value services or products.

Critical Skills :

• Expert in Swift, Objective-C, and Xcode - mastery of both languages is essential.
• Deep experience with iOS frameworks: UIKit, Core Data, Core Animation, Swift
  
  UI.
• Extensive hands‑on use of camera frameworks for photo capture, , and barcode scanning.
• Familiar with Vision Kit / Vision Framework for OCR, barcode, and text recognition.
• Strong experience building offline‑first mobile apps with resilient local storage (SQLite/Core Data).
• Solid understanding of MVC, MVVM, VIPER, Clean Architecture, modularization, and domain‑driven design.

• Direct experience integrating Bluetooth/BLE printers, including:
  • Zebra ZQ‑series (ZQ310, ZQ511 preferred)
  • Zebra iOS SDK
  • BLE communication protocols
• Ability to manage printer operational states: low battery, jams, no paper, timeouts, and connection loss.

• Knowledge of mobile app hardening, anti‑tamper measures, and secure local data handling.
• Experience with MDM solutions (Intune, Air Watch, Jamf) for enterprise deployment.
• Familiarity with certificate pinning, secure key storage, encrypted storage, and secure enclave patterns.
• Experience implementing SSO via OIDC, OAuth 2.0, and SAML provider SDKs.
• Strong knowledge of secure authentication and data protection: OAuth, JWT, Keychain, encryption.
• Strong experience integrating with backend services via REST/ Graph
  
  QL APIs, supporting secure real‑time and near‑real‑time synchronization through Azure services, data warehouses, and relational databases.
• Skilled in retry logic, conflict resolution, offline/online reconciliation, and data integrity guarantees.

• Skilled in creating responsive, accessible, high‑performance UI/UX.
• Ability to design field‑friendly interfaces optimized for:
  • Large touch targets
  • Low‑interaction workflows
  • Glove‑friendly usage
• Knowledgeable in ADA and accessibility compliance for mobile applications.

• Proficient in structured testing (unit, integration, system, regression, TDD) using XCTest and XCUITest.
• Knowledgeable in App Store Connect, provisioning profiles, signing, Test Flight, and release…