The Role
The Senior Native iOS Developer will design, build, and launch a native iOS app, drive development, ensure code quality and collaborate in an Agile setting.
Summary Generated by Built In
Job Summary
We are seeking a Senior iOS Developer (Contractor) for a high-impact 6-month engagement to design, build, and launch a robust native iOS application.
The ideal candidate will:
- Drive development from requirements to production within a 5-month delivery timeline
- Have deep expertise in Swift, SwiftUI, and modern concurrency (async/await)
- Be experienced in secure authentication (OAuth/MSAL) and performance optimization
- Thrive in a fast-paced Agile environment with high technical standards
This is a hands-on execution role for a developer who excels in delivering high-quality applications under tight deadlines.
Key Responsibilities1. Development & Delivery- Develop and deploy production-ready iOS features using Swift, SwiftUI, and UIKit
- Implement modern concurrency (async/await) for responsive UI and background processing
- Design and integrate secure authentication flows (OAuth, MSAL, SSO)
- Build scalable networking layers for RESTful API integration
- Implement efficient data handling and local caching
- Design modular, scalable applications using MVVM or Clean Architecture
- Perform advanced debugging and optimization using Xcode Instruments (Time Profiler, Leaks)
- Ensure code quality through peer reviews and best practices
- Follow Apple Human Interface Guidelines for UI/UX standards
- Participate in Agile ceremonies (stand-ups, sprint planning, retrospectives)
- Identify and resolve technical debt and bottlenecks proactively
- Maintain clear technical documentation for architecture and authentication
- Ensure smooth handoff post-contract
- 7–8+ years of native iOS development experience
- Proven track record of delivering 2–3+ apps end-to-end (concept to App Store)
- Expert in Swift (latest versions), SwiftUI, and UIKit
- Strong experience with async/await and multi-threading
- Hands-on experience with MVVM or Clean Architecture
- Ability to build scalable, maintainable applications
- Experience with OAuth, MSAL, and SSO-based authentication
- Strong background in REST API integration
- Experience with data persistence (Core Data / SwiftData)
- Expertise in Xcode Instruments (Time Profiler, Leaks, Network)
- Experience with:
- Git-based version control
- CI/CD tools (GitHub Actions, Bitrise, Xcode Cloud)
- Strong experience in Agile/Scrum environments
- Ability to manage tight deadlines and changing priorities
- Experience with:
- App Store Connect
- Certificates & provisioning
- Apple review process
- Ensure compliance with security best practices (Keychain, secure APIs)
- Manage TestFlight releases and versioning
- Collaborate with backend/design teams for API & UI optimization
- Conduct code reviews and mentor junior developers
- Identify and mitigate technical and delivery risks proactively
Top Skills
Async/Await
Ci/Cd Tools
Core Data
Git
Msal
Oauth
Restful Apis
Swift
Swiftui
Uikit
Xcode Instruments
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The Company
What We Do
DATAMAXIS takes pride in delivering a wide range of business IT modernization, data analytics, and technology management services. With command of the cutting-edge developments in these fields, our team and consultants are ready to provide you a robust technology modernization experience that results in a big boost in performance capability and operational efficiency.
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