iOS Engineer_Native Biomathematical Engine Integration

Position Type: Contract-to-hire or contract preferred; direct hire optional (candidate must own Mac required)

Hourly Pay: $25 - $30

Location: Remote (U.S.)

Minimum Years of Experience Required: 2

Company: The name of our partner organization will be disclosed during the interview process. This is not a direct role with LaunchCode; it is a position through LaunchCode, working with one of our partner companies.

Mid-level iOS Engineer (Swift) - Native SDK Integration

About the Role

We're looking for an experienced mid-level iOS Engineer to integrate a licensed third-party native SDK into an established production iOS application. This role is focused on engineering excellence, system integration, testing, and reliability-not building a new application from scratch.

You'll work within an existing SwiftUI codebase to integrate a sophisticated computational engine behind a pre-defined architecture, ensuring seamless functionality while preserving the existing user experience.

This is an opportunity to solve complex technical challenges involving native SDK integration, testing, concurrency, and production-quality software delivery.

What You'll Do

• Integrate a licensed third-party native iOS SDK into an existing production application.
• Implement a protocol-based adapter that maps SDK inputs and outputs to the application's domain models.
• Package and maintain third-party libraries using Swift Package Manager and/or XCFrameworks.
• Ensure compatibility with the existing architecture without requiring UI rewrites.
• Develop robust regression and dual-run testing to validate behavior against the existing implementation.
• Implement feature flags to safely transition between implementations.
• Document integration decisions, versioning strategy, upgrade paths, and failure scenarios.
• Collaborate with product and technical stakeholders to validate integration quality and release readiness.
• Help maintain modern Swift concurrency practices and high code quality standards.

Required Qualifications

• 3+ years of professional iOS development experience.

• Strong proficiency with Swift, SwiftUI, and modern iOS development.

• Experience with:

• Swift concurrency (async/await, actors, @MainActor)

• Integrating third-party native SDKs

• Swift Package Manager (SPM) and/or XCFrameworks

• Dependency management and resolving module/linker issues

• Strong understanding of API and data contract design, including timestamps, units, and data mapping.

• Experience creating comprehensive unit, integration, and regression test suites.

• Comfortable working within an established production codebase while maintaining existing architecture and patterns.

• Strong written communication skills and ability to document technical decisions.

• Mac development environment.

Preferred Qualifications

• Experience with HealthKit, BackgroundTasks, or local notification scheduling.
• Background working with scientific, healthcare, wellness, or safety-critical applications.
• Familiarity with numerical modeling, physiological modeling, or data-intensive computational systems.
• Experience optimizing on-device performance and numerical stability.
• Previous experience integrating licensed or closed-source SDKs under NDA.

Technical Environment

• Swift 5.9+
• iOS 17+
• SwiftUI
• MVVM architecture with service layer
• Core Data
• Keychain
• HealthKit
• UserNotifications
• BackgroundTasks
• XCTest & UI Testing
• Git / Pull Request workflow
• Modern Swift concurrency

What Success Looks Like

• The third-party SDK is successfully integrated into the production application.
• Existing application behavior remains stable through comprehensive regression testing.
• The integration can be safely enabled through feature flags.
• Technical documentation supports future SDK upgrades and maintenance.
• The solution meets performance, quality, and reliability expectations for production release.

This role is ideal for a senior iOS engineer who enjoys solving complex integration challenges, working with modern Swift technologies, and delivering production-ready software with a strong emphasis on quality, testing, and maintainability.