Markham, On Senior mobile application developer Jobs – 78 Openings This Week

Senior iOS Mobile Engineer (124)
Johnson Service Group Inc. —Toronto, ON
- Contract
- APIs
Quick apply
14h
Principal Android Engineer
Rakuten —Toronto, ON
- Full-time
- Computer Science
- Engineering
- Java
Principal Android Engineer
Rakuten Global —Toronto, ON
- Full-time
- Computer Science
- Engineering
- Java
Principal Front End Engineer
Questrade Financial Group —Toronto, ON
- $130,000–$170,000 a year
- Full-time
- Hybrid work
- System design
- Analysis skills
- JavaScript
Quick apply
4h

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Pala Interactive Canada Inc., operating as Boyd Interactive, is a full service real-money and social gaming technology provider and operator which caters to…
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Principal Front End Engineer
Questrade Financial Group —Toronto, ON
Best Practices & Quality: Establish and govern front-end engineering best practices, including code quality, component libraries, state management, testing…
$130,000–$170,000 a year
Quick apply
4h

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Senior iOS Mobile Engineer (124)

Johnson Service Group Inc. -
Toronto, ON

Quick apply

Job details

Contract
14 hours ago

Qualifications

MVC
iOS development
iOS
Git
Test-driven development
Application development
Usability
REST
APIs
JSON
GraphQL
Swift
Debugging

Full 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.

#LI-TF1
#D480

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senior mobile application developer jobs in markham, on

Senior iOS Mobile Engineer (124)

Principal Android Engineer

Principal Android Engineer

Principal Front End Engineer

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