Senior iOS Engineer

ww; United States; Hybrid; USD 180,000 - 260,000; Full time

Benefits offered by this job

Benefits package

Annual bonus program

Job summary

ww seeks a Senior iOS Engineer to build and improve native mobile features for a health and wellness product. You will work with product, design, data, and behavioral science partners to shape architecture, quality, and long-term maintainability while advancing engaging user experiences.

You will lead development of tracking, insights, and engagement features, including health data integrations, and contribute to performance optimizations, testing, and scalable code.

Qualifications

• 12–15+ years of professional iOS development experience.
• Strong Swift skills and experience with SwiftUI and Core Data.
• Deep knowledge of the iOS SDK, app lifecycle, and memory management.
• Familiarity with XCTest, CI/CD pipelines, and feature flagging.
• Clear communication skills and experience mentoring engineers.

Responsibilities

• Build and evolve features for food and activity tracking, weight trends, and AI-supported health insights.
• Create responsive, polished interfaces using modern Apple frameworks.
• Collaborate across product, design, data, and behavioral science to support habit-building and medical weight-management journeys.
• Implement initiatives such as Lock Screen widgets, Live Activities, and health data integrations.
• Influence architecture and engineering standards to keep the app modular, maintainable, and testable.
• Champion performance and product quality, explain technical trade-offs, and mentor less experienced engineers.

Skills

Swift

SwiftUI

Core Data

iOS architecture

Testing (XCTest)

CI/CD

Mentoring

Memory management

App lifecycle

Communication

Tools

XCTest

CI/CD tooling

Job description

Role overview

A Senior iOS Engineer builds and improves native mobile features for a health and wellness product, supporting personal tracking, progress insights, and ongoing engagement. The role works closely with product, design, data, and behavioral science partners, while shaping app architecture and technical quality.

Responsibilities

• Build and evolve features for food and activity tracking, weight trends, and AI-supported health insights.
• Create responsive, polished interfaces using modern Apple frameworks.
• Collaborate across product, design, data, and behavioral science to support habit-building and medical weight-management journeys.
• Implement initiatives such as Lock Screen widgets, Live Activities, and health data integrations.
• Influence architecture and engineering standards to keep the app modular, maintainable, and testable.
• Champion performance and product quality, explain technical trade-offs, and mentor less experienced engineers.

Requirements

• 12–15+ years of professional iOS development experience.
• Strong Swift skills and experience with modern Apple frameworks, including SwiftUI and Core Data.
• Deep knowledge of the iOS SDK, app lifecycle, and memory management.
• Familiarity with XCTest, CI/CD pipelines, and feature flagging.
• Clear communication skills and experience mentoring engineers.

Nice to have

• Experience with HealthKit or behavior-change products.

Benefits and work setup

• Hybrid work environment.
• Benefits package and annual bonus program.