Senior / Lead iOS Developer

Staffxpert LLC; New York (NY); Hybrid; USD 120,000 - 160,000; Full time

Job summary

StaffXpert LLC in New York City, NY is seeking a Senior / Lead iOS Developer to design native iOS applications using Swift, SwiftUI, and UIKit, with a focus on high-performance mobile solutions for real-time data in the financial services sector.

You will drive cloud integrations, secure data handling, and CI/CD pipelines while collaborating with product, architecture, and backend teams to deliver scalable, secure mobile platforms.

Qualifications

• 6+ years of native iOS development experience.
• Strong Swift, SwiftUI, UIKit, and Combine expertise.
• Experience with MVVM/MVVM-C patterns.
• Cloud and backend integration experience with REST/GraphQL/WebSockets.
• Proficient with Swift Concurrency and performance optimization.
• Experience with Xcode Instruments for profiling.
• Security-aware mobile development for finance environments.
• Financial services domain experience advantageous.

Responsibilities

• Design, develop, and maintain native iOS apps using Swift, SwiftUI, and UIKit.
• Handle real-time data streams and complex user interactions.
• Integrate with cloud services and backend APIs.
• Implement secure authentication and data protection practices.
• Optimize performance and memory usage with profiling.
• Develop automated tests and CI/CD pipelines.
• Collaborate with cross-functional teams to deliver high-quality solutions.
• Participate in design reviews and best-practice initiatives.

Skills

6+ years experience

Swift

SwiftUI

UIKit

Combine

MVVM

RESTful APIs

GraphQL

WebSockets

Swift Concurrency

Tools

AWS (API Gateway, AppSync, Cognito, Lambda, DynamoDB, S3)

RxSwift

gRPC

Protobuf

Xcode Instruments

CI/CD (GitHub Actions, Fastlane)

Job description

a { text-decoration: none; color: #464feb; } tr th, tr td { border: 1px solid #e6e6e6; } tr th { background-color: #f5f5f5; } Senior / Lead iOS Developer

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.