Senior iOS Engineer (Healthcare)

Whoop; Boston (MA); On-site; USD 100,000 - 130,000; Full time

Job summary

WHOOP is seeking a Senior iOS Engineer to join their Healthcare team in Boston, Massachusetts. In this role, you will build and improve the iOS applications that enhance WHOOP's medical offerings, focusing on platform capabilities and user features that promote healthy behaviors.

The ideal candidate will bring significant experience in native iOS app development, particularly with Swift and various frameworks, along with a strong understanding of iOS performance and reliability.

This position entails leading technical initiatives, mentoring other engineers, and ensuring the delivery of high-quality member-facing features.

Qualifications

• Significant experience with native iOS application development in production.
• Strong proficiency in Swift and various iOS frameworks.
• Experience collaborating across functions and mentoring other engineers.

Responsibilities

• Build foundations for WHOOP’s medical offerings across the iOS app.
• Lead technical planning for complex iOS initiatives.
• Mentor junior engineers and establish engineering standards.

Skills

Swift

iOS frameworks (SwiftUI, UIKit, XCTest)

Mobile application integration with backend services

Leadership in technical planning

iOS performance and reliability fundamentals

Tools

Xcode

Git

CI

Fastlane

Swift Package Manager

Job description

Requirements

• Significant experience building, testing, debugging, and shipping native iOS applications in production environments.
• Strong proficiency with Swift and iOS frameworks (for example, SwiftUI, UIKit, XCTest) and experience with modern architecture patterns (for example, MVVM).
• Experience leading technical planning and delivery for ambiguous, cross-cutting iOS initiatives (for example, modularization, large refactors, performance programs, or reliability initiatives).
• Strong foundation in iOS performance and reliability fundamentals (for example, memory management, profiling, and concurrency with Swift Concurrency and/or GCD).
• Experience integrating mobile apps with backend services and APIs (for example, RESTful APIs, authentication flows, and resilient networking).
• Familiarity with common iOS tooling and workflows (for example, Xcode, Git, CI, Fastlane, Swift Package Manager, CocoaPods).
• Demonstrated ability to collaborate effectively across functions (for example, Product, Design, QA, Data, and Backend Engineering) and communicate clearly with technical and non-technical audiences.
• Bonus: Experience building shared mobile foundations across platforms (for example, collaborating closely with Android on patterns and releases), or contributing to backend services and APIs (for example, Java).

Responsibilities

• As a Senior iOS Engineer on the Healthcare team, you will build the foundations that power WHOOP’s medical offerings across the iOS app—owning platform capabilities, shared architecture, and reliability and performance improvements that enable secure, scalable delivery of Medicare and Medicaid experiences.
• You will help bring WHOOP’s clinical and behavior‑change programs to life, developing features that drive measurable habit improvement and reinforce healthy behaviors for our members.
• In this role, you will lead technical planning for complex, highly regulated initiatives, mentor other engineers, and raise the bar for engineering excellence.
• Lead the design and implementation of core iOS platform capabilities (for example, app architecture, navigation patterns, shared UI components, networking, persistence, and feature flagging).
• Drive technical planning for initiatives, including scoping and sequencing work, identifying dependencies and risks, and communicating tradeoffs and timelines to stakeholders.
• Deliver high‑quality, member‑facing iOS features in Swift, collaborating with cross‑functional partners to ensure requirements are met and outcomes are measurable.
• Improve app reliability, performance, and maintainability through testing, observability, crash and performance monitoring, and disciplined release practices.
• Establish and evolve shared engineering standards through code reviews, documentation, and architectural discussions, influencing patterns used across iOS development.
• Mentor and support other engineers through pairing, feedback, and knowledge sharing, helping grow individual capability and the overall health of the codebase.