Senior IOS Developer

Senior Software EngineerSalary Range: $126,745 - $149,600Department: Information TechnologySupervisor: Product Director, Legal, Safety, and RiskLocation: 2 Broadway, New York, NY 10004Hours of Work: 9:00 am - 5:30 pm (7.5 hours/day) or as requiredThis 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.About UsThe Metropolitan Transportation Authority (MTA) 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.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.SummaryLeads 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 SkillsCore iOS EngineeringExpert in Swift, Objective-C, and Xcode - mastery of both languages is essential.Deep experience with iOS frameworks: UIKit, Core Data, Core Animation, SwiftUI.Extensive hands-on use of camera frameworks for photo capture, ID scanning, and barcode scanning.Familiar with VisionKit/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.Hardware IntegrationDirect experience integrating Bluetooth/BLE printers, including:Zebra ZQ-series (ZQ310, ZQ511 preferred)Zebra iOS SDKBLE communication protocolsAbility to manage printer operational states: low battery, jams, no paper, timeouts, and connection loss.Security & ComplianceKnowledge of mobile app hardening, anti-tamper measures, and secure local data handling.Experience with MDM solutions (Intune, AirWatch, 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.Backend CommunicationStrong experience integrating with backend services via REST/GraphQL 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.User ExperienceSkilled in creating responsive, accessible, high-performance UI/UX.Ability to design field-friendly interfaces optimized for:Large touch targetsLow-interaction workflowsGlove-friendly usageKnowledgeable in ADA and accessibility compliance for mobile applications.Quality, Analytics & DeliveryProficient in structured testing (unit, integration, system, regression, TDD) using XCTest and XCUITest.Knowledgeable in App Store Connect, provisioning profiles, signing, TestFlight, and release workflows.Experience collaborating with product owners and field officers to refine operational use cases.Hands-on experience with DevOps/DevSecOps, CI/CD pipelines (GitHub/GitLab, Jenkins, Bitrise), and dependency managers (SPM, CocoaPods, Carthage).Experienced with APNs, Firebase, and cloud analytics for telemetry, diagnostics, and notifications.ResponsibilitiesLeads requirements management, software design, and engineering, and testing activities across all stages and iterations of medium complexity software development and integration initiatives, using agreed models, methods, and tools. Assists with the organization's selection, adaptation, and adoption of new models, methods, and tools. Collaborates across parties involved in product, systems, or service design.May own medium impact/value services or products. Defines, documents, and executes medium-sized projects within business objectives and resource constraints, ensuring adherence to agreed enterprise architectures, and the application of effective change-release-, risk, and quality-management processes.Maintains software support processes and documentation and applies software management tools to investigate and resolve moderately complex issues, prioritize, diagnose incidents, collect system statistics, and create reports.Develops system and acceptance testing criteria related to functional and non-functional requirements, user stories, features, business processes, and business rules. Designs, specifies, and executes test cases and scenarios.Adept in applying agreed tools and techniques to evaluate user experiences of programs and products, and validate that usability, accessibility, and visual design requirements are satisfied.Develops, maintains, and applies tools and documentation to track, log, and maintain accurate and complete system information. Audits medium-complexity software systems for adherence to configuration standards.Plans and conducts assigned assurance assessments and suggests opportunities for quality and safety improvement. Contributes to the identification, analysis, and documentation of software-related safety risks and proposes corrective actions.Monitors supplier performance and customer satisfaction. Engages proactively and collaboratively with suppliers to resolve incidents and problems.Continuously develops and maintains adept knowledge of software engineering practices, emerging trends, and technologies.Provides technical advice to project teams and mentors less experienced staff to foster talent development.Travel may be required to other MTA locations or other external sites.May need to work outside of normal work hours supporting 24/7 operations (i.e., evenings and weekends).Performs other duties and tasks as assigned.Provides technical advice to project teams and mentors less experienced staff to foster talent development.Observing the work performed by the contractor.Reviewing invoices and approving them if the work meets contractual standards.Addressing performance issues with the contractor when possible.Escalating issues to other parties as needed.Regular and reliable attendance is expected and required.Required QualificationsEducation: Bachelor's degree and a minimum of 5 years of relevant experience. An equivalent combination of education and experience may be considered in lieu of a degree.Experience: 5 yearsCertification(s): Requires at least one certification in the current platform/domain/technical skill. Possible certifications could be, but are not limited to:Relevant CertificationsAgile Project Management - Azure Solutions ArchitectC Programming Language (CLA, CLP, CPA, CPP) - Certified Information Privacy Professional (CIPP)Certified Information Security Manager (CISM) - Certified Information Systems Auditor (CISA)Certified Secure Software Lifecycle Professional