Senior iOS App Developer Needed for Mobile Auth Overhaul Delivery

Keystone Digital

Freelance · Remote · Flexible hours

About the role

Keystone Digital is expanding a B2B SaaS platform with a new multi‑tenant feature set. We need an iOS App Developer to design and ship isolated tenant experiences while keeping the core codebase stable. This short‑term contract focuses on delivering clean, testable modules that integrate with existing back‑end services.

Key responsibilities

• Architect and implement tenant‑aware UI components in Swift
• Consume REST APIs securely and handle dynamic configuration per tenant
• Write unit and UI tests to guarantee feature isolation
• Collaborate with product and backend teams to define data contracts
• Document implementation patterns for future tenant extensions

Must-have skills

• Strong proficiency in Swift and iOS SDK
• Hands‑on experience with REST API integration
• Understanding of multi‑tenant architecture concepts
• Ability to produce clean, maintainable code under tight timelines

Nice to have

• Familiarity with Combine or RxSwift for reactive data flows
• Experience with CI/CD pipelines for iOS
• Knowledge of App Store deployment for enterprise distribution