OverviewThe Lead iOS Engineer is a leading velocity contributor for a cross-functional delivery Pod, responsible for shaping, reinforcing, and executing the technical direction of iOS applications. They drive the design, implementation, and testing of high-quality, scalable mobile solutions, ensuring strong alignment with modern iOS best practices and user experience standards.
They play a critical role in accelerating team delivery by identifying and addressing technical and process bottlenecks, applying pragmatic engineering approaches, and maintaining a high bar for code quality, performance, and reliability. As a senior member of the team, they contribute meaningfully across the full mobile development lifecycle-from architecture and development through testing, release, and ongoing optimization.
The Lead iOS Engineer works closely with Product, Design, and cross-functional engineering partners to deliver user-centric solutions that meet both business and technical objectives. They bring a strong passion for the iOS platform, championing technologies like Swift, SwiftUI, and Liquid Glass Design, while staying current with evolving platform capabilities and industry trends.
They also serve as a mentor and technical leader within the team, supporting the growth of junior engineers, promoting best practices, and contributing to a culture of continuous improvement, collaboration, and engineering excellence.
This role follows a hybrid schedule and requires regular, in-person work at our Boston, MA or Hampton, NH office. Our hybrid model is M/T/W in office and TH/F are optional work-from-home. Candidates must reside within commuting distance of one of these locations. Fully remote work is not available for this role.
ResponsibilitiesTechnical Contributions- Actively contributes to the design, implementation, and testing of iOS applications using Swift, SwiftUI (with limited UIKit as needed), and modern architecture patterns (MVVM, MVI, Clean Architecture).
- Identifies and removes delivery and quality bottlenecks (e.g., build performance, app performance, release friction) through pragmatic, scalable solutions.
- Applies modern iOS practices, including CI/CD, automated testing (unit and UI), observability, and performance monitoring.
- Champions iOS platform excellence, including Human Interface Guidelines (HIG), accessibility, responsiveness, and device compatibility.
- Contributes to the iOS technical vision and helps evolve mobile architecture and standards.
- Leverages AI-powered tools to improve development efficiency and shares learnings with the team.
- Acts as a trusted advisor on iOS-specific design, architecture, and platform capabilities.
- Champions best practices (lifecycle management, state handling, performance optimization, modularization) through code reviews and mentorship.
Cross Functional Collaboration- Executes delivery plans using modern iOS technologies to build performant, user-centric mobile experiences.
- Proactively identifies and mitigates risks related to performance, device fragmentation, and platform constraints.
- Collaborates closely with Product and Design to deliver intuitive, high-quality experiences aligned with Human Interface Guidelines (HIG) principles.
- Partners with backend and platform teams to ensure seamless integration and efficient, reliable releases (including App Store rollout strategies).
High Quality Development and Delivery- Ensures quality through strong testing practices, monitoring, and iterative release cycles.
Team and Culture Building- Supports and mentors junior engineers, strengthening team capabilities in Swift, SwiftUI, and modern iOS development.
- Contributes to a high-performance, inclusive engineering culture grounded in trust, accountability, and collaboration.
- Advocates for mobile excellence across performance, usability, accessibility, and platform consistency.
- Promotes continuous learning, experimentation, and adoption of modern iOS tools and practices.
- Leads by example with strong ownership, craftsmanship, and pride in delivering high-quality mobile experiences.
- A deep passion for the platform and helping improve the lives of millions of people.
Qualifications- Bachelor's degree in a related field (Computer Science, Computer Engineering, Management Information Systems, etc.). Master's degree a plus
- 5+ years of software engineering experience, with a strong focus on building and delivering iOS applications in cross-functional teams
- Strong proficiency in Swift and modern iOS development, including SwiftUI and core Apple frameworks (Combine, SwiftData/Core Data, Navigation), required
- Deep understanding of iOS fundamentals (lifecycle, state management, concurrency (async/await, GCD), threading, performance optimization), required
- Experience with modern architecture patterns (MVVM, MVI, Clean Architecture) and modularized codebases
- Experience with iOS testing (XCTest, XCUITest, Appium) and mobile CI/CD pipelines
- Familiarity with Human Interface Guidelines (HIG) and building accessible, responsive UIs across diverse iOS devices
- Experience integrating RESTful APIs and working with asynchronous patterns (async/await, Combine); GraphQL is a plus
- Experience with mobile observability and monitoring tools (e.g., Firebase, Datadog)
- Knowledge of cloud platforms (AWS, Azure, GCP) and mobile-backend integration patterns
- Experience with App Store release processes, versioning, and staged rollouts
- Knowledge of defining, measuring, and improving key iOS performance metrics (e.g., startup time, jank/frame drops, hangs/watchdog terminations, crash-free sessions, memory and battery usage), with experience leveraging profiling and observability tools to drive continuous performance improvements
- Experience with AI-assisted development tools or AI-enabled features is a plus
- Strong problem-solving, communication, and collaboration skills, with the ability to operate effectively in fast-paced environments
- Strong attention to detail, efficient, and organized with an ability to establish priorities and objectives
- Excellent presentation and communication skills along with the ability to communicate effectively across all levels of the organization
- Able to establish and maintain effective, collaborative work relationships with diverse individuals, internally and externally
- Dedicated learner with a natural curiOSity for consistent growth
- Exhibits comfort, ease, and flexibility working in an extremely fast-paced ever-changing, deadline-driven environment
- Cooperative team player with an upbeat, positive, "can-do" attitude
PerksPlanet Fitness cares about you and your well-being. We offer a comprehensive benefits package to eligible employees which includes the core medical, dental, vision, life and disability as well as supplemental accident, hospital and critical illness coverage options. In addition, we are proud to offer eligible employees a generous time off program (including volunteer time), childcare reimbursement, paid parental leave, pet care reimbursement, tuition reimbursement, free Black Card membership, learning and development programs and a whole host of engagement activities. We offer a 401(k) Plan with safe harbor employer matching and an employee stock purchase plan. This role is also eligible to participate in an annual corporate bonus incentive program based on company financial and personal performance.
The salary for NH-based and MA-based employees hired into this role will be aligned with the range below. This is a good faith estimate, and the amount of base salary will correspond with a candidate's professional experience, qualifications and internal equity.
Annual Base Salary Range: $130,000-$150,000
