Senior Ios Developer

TEKsystems•Deerfield, IL

1d•$55 - $60•Hybrid

About The Position

Key Responsibilities: iOS Engineering -Build and maintain modern iOS apps using Swift, SwiftUI, and UIKit. -Architect modular, testable, scalable applications with MVVM and DI. -Implement reactive and asynchronous flows using Combine and async/await. -Integrate with REST APIs and implement offline persistence (Core Data/Realm/SQLite). -Optimize performance using Instruments (e.g., memory usage, CPU, launch time). App Distribution & DevOps -Manage modules and internal frameworks using SPM. -Own CI/CD workflows for iOS builds (Fastlane or equivalents). -Configure and manage TestFlight distribution and release automation. Quality & Collaboration -Write and maintain unit and UI tests (XCTest). -Participate in code reviews, technical discussions, and architectural planning. -Work closely with Product Engineering, Backend teams, and Android developers. App Ownership -Take independent ownership of features, releases, and roadmap items. -Guide the team on best practices, modern iOS development patterns, and release processes.

Requirements

swift
mvvm
application development
apple ios
android
api development

Nice To Haves

Android knowledge or experience supporting Android apps (highly preferred by the team for cross‑skill coverage).
Experience working in healthcare, HIPAA‑regulated environments, or other high‑compliance systems (not required, but helpful).
Understanding of backend service development or API design principles.
Experience collaborating with backend teams on REST API improvements.
Understanding of backend service development or API design principles.
Experience collaborating with backend teams on REST API improvements.
Familiarity with modular architecture, feature modules, and dynamic frameworks.
Experience with analytics platforms (Firebase, Amplitude, Mixpanel, Segment, etc.).
Experience managing A/B testing or in‑app experiments.

Responsibilities

Build and maintain modern iOS apps using Swift, SwiftUI, and UIKit.
Architect modular, testable, scalable applications with MVVM and DI.
Implement reactive and asynchronous flows using Combine and async/await.
Integrate with REST APIs and implement offline persistence (Core Data/Realm/SQLite).
Optimize performance using Instruments (e.g., memory usage, CPU, launch time).
Manage modules and internal frameworks using SPM.
Own CI/CD workflows for iOS builds (Fastlane or equivalents).
Configure and manage TestFlight distribution and release automation.
Write and maintain unit and UI tests (XCTest).
Participate in code reviews, technical discussions, and architectural planning.
Work closely with Product Engineering, Backend teams, and Android developers.
Take independent ownership of features, releases, and roadmap items.
Guide the team on best practices, modern iOS development patterns, and release processes.