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Johnson Service Group
Senior iOS Mobile Engineer (124)Johnson Service Group • Toronto, ON, CA
Senior iOS Mobile Engineer (124)

Senior iOS Mobile Engineer (124)

Johnson Service Group • Toronto, ON, CA
15 hours ago
Job type
  • Full-time
  • Quick Apply
Job description

Our client is seeking a Senior iOS Mobile Engineer to design, develop, and maintain scalable, high-performing iOS applications while collaborating with cross-functional teams to deliver exceptional mobile experiences. (Toronto, Hybrid, 2 days in office/wk)
Must Have Skills
  • 9–10 years of hands-on iOS application development experience.
  • Strong proficiency in Swift, including protocols, generics, and functional programming concepts.
  • Experience building applications using SwiftUI and modern iOS frameworks.
  • Expertise with Xcode for development, debugging, performance optimization, and profiling.
  • Experience integrating REST APIs, GraphQL, JSON, and third-party services.
  • Knowledge of CoreData, Keychain, and UserDefaults for data persistence.
  • Experience with XCTest, XCUI, and Test-Driven Development (TDD).
  • Strong Git-based source control and collaborative development practices.
  • Experience using Xcode Instruments and Memory Graph to analyze and optimize application performance.
  • Strong understanding of MVC, MVVM, and Clean Architecture design patterns.
  • Excellent problem-solving, debugging, and troubleshooting skills.
  • Proven ability to work independently with strong ownership and accountability.

Nice to Have Skills
  • Backend development experience.
  • Passion for learning and adopting emerging iOS technologies.

Responsibilities
  • Design, develop, and maintain high-quality iOS applications and new features.
  • Collaborate with product managers, designers, QA engineers, and fellow developers to deliver exceptional user experiences.
  • Translate business requirements into scalable, maintainable technical solutions.
  • Work effectively with cross-functional teams while managing dependencies and resolving technical challenges independently.
  • Participate in code reviews and contribute to engineering best practices.
  • Identify, troubleshoot, and resolve application performance, stability, and usability issues.
  • Continuously improve application quality, performance, and maintainability.
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Senior iOS Mobile Engineer (124) • Toronto, ON, CA

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