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 Senior Engineer, Mobile Applications will contribute to the design, development, and delivery activities of a cross-functional engineering team.  Through strong hands-on technical contributions focused heavily on mobile applications, the Senior Engineer will contribute to technical excellence across key strategic initiatives.  The Senior Engineer will partner closely with a Technical Lead 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 Contributions

• Implements the technical architecture of a platform or product, moving from architecture to design to high-quality software.
• Contributes to design and implementation decisions.
• Provides hands-on mentorship and guidance to more junior engineering team members, fostering skill growth and innovation.
• Champions best practices in system design, development, testing, and deployment, including AI-powered engineering capabilities.

Cross-Functional Collaboration

• Rapidly delivers solutions that amaze users and drive business outcomes as part of a cross-functional team.
• Works across engineering, infrastructure, data, and security teams.
• Executes against 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 strong engineering approaches while balancing technical feasibility and business priorities.

High-Quality Development & Delivery

• Makes strong hands-on contributions to implementation, testing, and operations.
• Establishes pragmatic, repeatable approaches for writing, validating, and shipping high-quality software.
• Contributes to the adoption of modern engineering practices, including CI/CD pipelines, automated testing, observability, and cloud-native patterns.

Team & Culture Building

• Embraces a culture of continuous learning, experimentation, and technical excellence.
• Serves as a role model for engineering values, instilling ownership, craftsmanship, and pride in delivery.

• 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 as part of a cross-functional delivery team
• Breadth and depth of experience in implementation of mobile applications. This includes a proven track record of driving stories to completion and collaborating across a cross-functional teams to deliver an outcome
• Deep hands-on experience is native mobile application languages (e.g., Swift, Kotlin), user interfaces (e.g., SwiftUI, Jetpack Compose), and supporting tooling (e.g., Firebase, Sentry)
• Experience with CI/CD pipeline development and AI-powered engineering tooling is a strong plus
• Experience using Generative AI (GenAI) user-facing software products or applications is also highly desirable
• Should have a practical understanding of RESTful service design and be skilled in integrating with synchronous and asynchronous APIs. Experience with GraphQL is also helpful but not required
• Solid analytical and problem-solving skills, with the ability to tackle ambiguous problems and make data-driven decisions
• 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!

Planet 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.

Note to Applicants: We have been made aware of an increasing number of hiring fraud schemes across numerous platforms. Planet Fitness never requires advance payments of any kind for computer equipment or any other purpose at the start of employment. Any request for you to provide payment information during the application process is part of a fraud scheme. Further, we recommend that you do not provide sensitive personal information (SSN, DOB, driver’s license number) as part of the initial application process.