Senior iOS Developer
Pittsburgh, Pennsylvania
Experience: 5
Category: Information Technology
Contractor Work Model: Hybrid
Brand: System One
Job ID: 381268
Date Posted: 09/30/2026
Shortcut: http://jobs.systemone.com/sA7xfD
Job Title: Senior iOS Developer
Location: Pittsburgh, Pennsylvania
Type: Permanent Full Time
Work Model: Hybrid – onsite and remote
Responsibilities
- Responsible for sound and high quality technical deliverables.
- Analyze, quantify, and estimate the amount of work for every sprint or release.
- Understand the requirements, current state architecture of the enterprise, and create a roadmap for future enhancements accordingly.
- Develop mobile application code in coordination with other team members.
- Integrate the mobile applications with the centralized authentication application.
- Create Software Architecture Document, High Level and Low Level Design document, Nonfunctional requirements for the project.
- Work in an Agile environment and adapt to the changing needs and requirements of the business.
- Always be ready to be hands-on to develop or fix issues to deliver on time and with highest quality.
- Work closely with BA/QA team members to create test plans, and ensure that issues are properly identified, fixed, and tested.
- Ensure that software design patterns like MVP, MVVM are strictly followed.
- Groom the team and develop the application with customer-centric ideas and innovation as the core of every activity.
- Escalate issues and concerns to the leads in a timely manner to avoid impacts to timelines.
- Effective participant of requirements gathering and analysis.
- Apply technologies and domain knowledge with the delivery of developed or integrated components.
- Work on problems of moderate scope where analysis of situations or data requires review of various factors.
- Triage or analyze situations for production support.
- Knowledge on biometric authentication and device capabilities like Camera, Phone state, Location, Notifications, Permissions management, etc.
Requirements
- 7+ years of experience with mobile development.
- 5+ years of experience with iOS App Development on Swift, Swift UI, and Objective C.
- Strong Object-Oriented background.
- Experience with iOS frameworks such as Core Data, Core Animation, etc.
- Experience with XCode for coding, debugging, and deploying iOS apps.
- Experience with offline storage, threading, performance tuning, and mobile memory management.
- Familiarity with RESTful APIs to connect iOS applications to back-end services.
- Familiarity with app architecture patterns MVC, MVP, MVVM.
- 4+ years of experience integrating with RESTful APIs and JSON.
- Knowledge of web technologies and UI/UX standards.
- Understanding of Apple's design principles and interface guidelines.
- Knowledge of low-level C-based libraries is preferred.
- Familiarity with cloud message APIs and push notifications.
- Experience with Git or other version control systems.
- Experience with XCTestFramework and XCUITestFramework.
- Exceptional at component and unit testing following standard practices.
- Ability to deliver on time with minimal supervision.
- Strong agile/scrum development experience.
- Strong collaboration and communication skills within distributed teams.
- Excellent written and verbal communication skills.
**System One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.
System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.**
Ref: #404-IT Pittsburgh
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