Freelance App Store Optimization Jobs in Michigan

Job Title: Senior Native iOS Developer

Location: Dearborn, MI (Hybrid)

Hiring Type: Contract

Note: F2F interview Must

Job Summary: We are looking for a Senior iOS Contractor for a high-impact, 6-month project to build and launch a robust native application. Your primary mission is to take our existing requirements to a production-ready state within 5 months. This role requires an expert in Swift and SwiftUI who can immediately implement modern async/await concurrency and secure SSO/MSAL authentication. You must be highly proficient with Xcode Instruments for rapid performance tuning and debugging to ensure a stable launch. Working in a fast-paced Agile environment, you will use MVVM/Clean Architecture to build scalable features that are easy to hand off. This is a hands-on execution role for a developer who thrives on tight delivery timelines and high technical standards.

Essential Job Functions

Development & Delivery

• Rapid Feature Execution: Develop and deploy production-ready native iOS features using Swift, SwiftUI, and UIKit within a compressed 5-month build cycle.
• Modern Concurrency: Implement highly responsive user interfaces by leveraging async/await and modern Swift concurrency patterns to handle complex background tasks.
• Secure Authentication: Architect and integrate secure login flows using OAuth and MSAL for seamless SSO-based implementations.
• API Integration: Build robust networking layers to consume RESTful APIs, ensuring efficient data handling and local caching where necessary.

Architecture & Code Quality

• Scalable Design: Utilize MVVM or Clean Architecture patterns to ensure the codebase remains modular, testable, and easy to transition after the 6-month term.
• Performance Optimization: Conduct deep-dive debugging and memory management using Xcode Instruments (Time Profiler, Leaks) to ensure a high-performance, crash-free user experience.
• Code Governance: Participate in rigorous peer code reviews to maintain high standards for code cleanliness, security, and adherence to Apple’s Human Interface Guidelines.

Agile Collaboration

• Sprint Execution: Actively participate in Agile ceremonies (Daily Standups, Sprint Planning) to ensure project milestones are met for the month-5 delivery target.
• Technical Problem Solving: Identify and resolve technical debt or architectural bottlenecks early to prevent delays in the launch schedule.
• Documentation & Handoff: Provide clear technical documentation for the authentication logic and core architecture to ensure a smooth transition at the end of the contract.

Minimum Qualifications and Job Requirements

Professional Experience

• Senior-Level Expertise: 7–8+ years of professional experience in native iOS development with a proven track record of shipping high-quality applications.
• Full Lifecycle Success: Must have successfully led the development and deployment of at least 2–3 major apps from initial concept to App Store launch.

Technical Core:

• Advanced Swift Mastery: Expert-level command of Swift (latest versions), including deep knowledge of SwiftUI and UIKit interoperability.
• Concurrency Specialist: Hands-on experience implementing async/await and modern Swift concurrency patterns to manage complex, multi-threaded applications.
• Architectural Proficiency: Strong understanding of scalable architecture patterns, specifically MVVM or Clean Architecture, and their practical application in production environments.

Security & Integration

• Identity & Auth: Proven experience integrating secure authentication frameworks, specifically OAuth and MSAL for SSO-based enterprise environments.
• API Excellence: Deep experience consuming RESTful APIs and managing complex data persistence (Core Data or SwiftData).

Stability & Tools

• Performance Tuning: Expert proficiency with Xcode Instruments (Time Profiler, Leaks, Network) for debugging and optimizing app performance and memory usage.
• Tooling: Experience with Git-based version control and CI/CD pipelines (e.g., GitHub Actions, Bitrise, or Xcode Cloud).

Project Execution

• Agile Veteran: Experience working in fast-paced Agile/Scrum environments, with the ability to manage strict deadlines and shifting priorities.
• Deployment Ownership: Hands-on experience with App Store Connect, certificates, provisioning, and navigating the Apple review process.

Other Responsibilities

• Security & Compliance: Ensure all development adheres to industry-standard security protocols, particularly regarding data storage (Keychain) and secure API communication, to meet enterprise requirements.
• Release Management: Coordinate TestFlight deployments for stakeholder feedback and internal QA cycles, managing versioning and build distribution throughout the 5-month build.
• Architectural Guidance: Act as a technical consultant for backend or design teams to ensure API contracts and UI assets are optimized for native iOS performance and constraints.
• Code Review & Mentorship: Conduct rigorous peer code reviews for any auxiliary developers or contributors, ensuring the codebase remains clean, maintainable, and free of technical debt.
• Risk Mitigation: Proactively identify and communicate potential technical or timeline risks to project leadership, offering actionable solutions to keep the 5-month launch on track.