Principal Engineer, Product Engineering; Mobile

About Us

Founded in 1992 in Dover, NH, Planet Fitness is one of the largest and fastest-growing franchisors and operators of fitness centers in the United States by number of members and locations. We have over 2,700+ stores in 50 states, the District of Columbia, Puerto Rico, Canada, Panama, Mexico, Spain, and Australia. 90% of Planet Fitness stores are owned and operated by independent franchisees.

At Planet Fitness, our unique mission has always been to enhance people’s lives by providing a high-quality fitness experience in a welcoming, non-intimidating environment. And we’re proud of the amazing Planet Fitness team that supports our clubs and team members. They are comprised of dynamic, dedicated, and talented individuals who represent our values of integrity, transparency, passion, respect, and excellence (while having fun!)

in everything they do.

Joining the PF family means being part of a company that cares about bettering the health and wellbeing of our communities. It means being a part of a supportive, engaging workforce with an inclusive culture that values diversity and creates an environment where everyone can feel they belong. It means encouraging professional growth and development. It means making true, lasting connections with your co-workers with celebrations, team building activities and engaging corporate events!

It means creating a positive impact in our local communities through our Judgement Free Generation® philanthropic initiative. It means being part of a brand that you can be proud of!

For the past 30 years, we’ve helped millions of people in their fitness journey and revolutionized the industry along the way. And we’re just getting started!

The Principal Engineer, Product Engineering (Mobile) will lead and oversee the architecture, design, development, and delivery activities of a cross-functional engineering team with a heavy mobile application focus. Through strong hands‑on technical contributions and cross-team leadership and coordination, the Principal Engineer will instill technical excellence across key strategic initiatives. The Principal Engineer will partner closely with Product and Design counterparts to identify innovative solutions to user and business challenges using leading technology and delivery practices.

They will also work closely with Data, Security, Infrastructure, and Operations teams using our technology delivery methodology and our ways of working.

As a member of a growing team, you'll also play a role in shaping and defining the team's culture. You'll get the benefits of a fast-paced environment in an environment where teamwork, culture, and collaboration are paramount.

This is a hybrid role based out of our Hampton, NH office.

Technical Leadership

• Defines the technical architecture of a platform or product, aligning it with the technical architecture for the enterprise.
• Serves as a trusted technical advisor and decision‑maker for architectural and design decisions.
• Provides hands‑on mentorship and guidance to the engineering team, fostering skill growth and innovation.
• Champions best practices in system design, development, testing, and deployment, including AI‑powered engineering capabilities.

Cross‑Functional Discovery & Collaboration

• Partners with Product and Design to rapidly explore solutions that amaze users and drive business outcomes.
• Works across engineering, infrastructure, data, and security teams to align methodologies, platforms, and delivery practices.
• Launches new capabilities rapidly, while managing risk continuously from inception through operations
• Develops and executes delivery plans that take advantage of cutting‑edge technologies to deliver solutions that exceed expectations.
• Anticipates and mitigates risks early in the development cycle, ensuring scalable and resilient solutions.
• Advocates for customer‑centric design thinking while balancing technical feasibility and business priorities.

High‑Quality Development & Delivery

• Maintains strong hands‑on involvement in their team's work, providing technical expertise and oversight on architecture, implementation, testing, and operations.
• Establishes pragmatic,…