Senior / Lead iOS Developer

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Location: New York City, NY (Hybrid)

Job Summary

STAFFXPERT LLC is seeking a Senior / Lead iOS Developer on behalf of our client in New York City, NY. This is an exciting opportunity for a senior-level mobile engineer with expertise in native iOS development, cloud integrations, and high-performance applications within the financial services domain. The ideal candidate will play a key role in designing and building scalable, secure, and responsive mobile solutions that support real-time data processing and mission-critical business operations.

Key Responsibilities

• Design, develop, and maintain native iOS applications using Swift, SwiftUI, UIKit, and modern architectural patterns.
• Build high-performance mobile interfaces capable of handling real-time data streams and complex user interactions.
• Integrate mobile applications with cloud-based services and backend APIs.
• Implement secure authentication, data protection, and mobile security best practices.
• Optimize application performance, memory utilization, and responsiveness through profiling and performance tuning.
• Develop and maintain automated testing frameworks and CI/CD pipelines.
• Collaborate with cross-functional teams including product managers, architects, and backend engineers to deliver high-quality solutions.
• Participate in technical design discussions, code reviews, and best practice initiatives.

Required Qualifications

• 6+ years of professional experience in native iOS application development.
• Strong expertise in Swift, SwiftUI, UIKit, and Combine.
• Experience with modern architectural patterns such as MVVM, MVVM-C, or similar frameworks.
• Hands-on experience integrating mobile applications with cloud platforms and backend services.
• Strong understanding of RESTful APIs, GraphQL, WebSockets, and mobile networking concepts.
• Advanced knowledge of Swift Concurrency, asynchronous programming, multithreading, and performance optimization.
• Experience using Xcode Instruments for debugging, profiling, and performance analysis.
• Strong understanding of secure mobile application development, authentication mechanisms, and data protection practices.
• Experience within Investment Banking, Capital Markets, Wealth Management, Trading, or other Financial Services environments.
• Strong communication, leadership, and problem-solving skills.

Preferred Qualifications

• Experience with AWS services such as API Gateway, AppSync, Cognito, Lambda, DynamoDB, and S3.
• Experience with RxSwift, gRPC, Protobuf, or other event-driven frameworks.
• Knowledge of financial industry regulations and compliance standards.
• Experience building low-latency, real-time applications for financial markets.
• Familiarity with Metal, Core Graphics, or advanced data visualization technologies.
• Experience with CI/CD tools such as GitHub Actions, Fastlane, and automated mobile testing platforms.