Senior iOS Engineer: Build Scalable, High-Performance Apps

L7Commerce; Los Angeles (CA); On-site; USD 130,000 - 140,000; Full time

Job summary

Litmus7 is seeking an experienced iOS Developer in Los Angeles to design, develop, and maintain high-quality iOS apps for our clients. You will work with cross-functional teams to deliver robust, high-performing mobile solutions.

The role requires 10+ years in iOS, strong Swift/Objective-C, UIKit/SwiftUI, MVVM, and REST/GraphQL integration, with a track record of performance optimization and thorough testing.

Qualifications

• A minimum of 10 years of professional experience in iOS development.
• Proficiency in Swift and Objective-C.
• Expertise in UIKit and SwiftUI.
• Proven experience with the Combine framework.
• Strong understanding of iOS frameworks such as Core Data.
• Experience with animations and transitions.
• Proven experience with MVVM and familiarity with other architectural patterns
• Familiarity with RESTful and GraphQL APIs and integration with third-party libraries.
• Demonstrated expertise in unit testing and UI testing.
• Knowledge of iOS design principles and Apple’s Human Interface Guidelines.
• Experience optimizing the performance of SwiftUI applications.
• Understanding of memory management in Swift and resolving related issues in SwiftUI applications.
• Hands-on experience in multi-threaded programming and a good understanding of networking concepts.
• Experience with version control systems like Git or Bitbucket.
• Familiarity with CI/CD tools such as Jenkins, Bamboo and test tools such as XCTest
• Experience with iOS App Store submission and release processes.
• Knowledge of security best practices.
• Excellent problem-solving and analytical skills.
• Strong communication and interpersonal abilities.

Responsibilities

• Create and maintain high-quality, scalable, and reusable iOS applications aligned with business requirements.
• Work closely with product managers, UX/UI designers, and backend developers to integrate user-facing features and backend services.
• Write clean, maintainable, and efficient code while adhering to best practices, including unit testing, debugging, and code reviews.
• Identify and resolve performance bottlenecks, memory leaks, and other system inefficiencies.
• Stay up to date with the latest iOS development trends, frameworks, and tools to ensure the use of cutting-edge technologies.

Skills

Swift

Objective-C

UIKit

SwiftUI

Combine

MVVM

REST APIs

GraphQL

Unit Testing

UI Testing

Memory Management

Multithreading

Networking

Git

CI/CD

Job description

Litmus7 is seeking an experienced iOS Developer in Los Angeles to design, develop, and maintain high-quality iOS apps for our clients. You will work with cross-functional teams to deliver robust, high-performing mobile solutions.

The role requires 10+ years in iOS, strong Swift/Objective-C, UIKit/SwiftUI, MVVM, and REST/GraphQL integration, with a track record of performance optimization and thorough testing.