Senior Net Software Developer Jobs in Amherst, MA

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 world by number of members and locations. As of March 31, 2026, Planet Fitness had approximately 21.5 million members and 2,909 clubs in all 50 states, the District of Columbia, Puerto Rico, Canada, Panama, Mexico, Australia and Spain. The Company's mission is to enhance people's lives by providing a high-quality fitness experience in a welcoming, non-intimidating environment, which we call the Judgement Free Zone . Approximately 90% of Planet Fitness clubs are owned and operated by independent business owners.
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!
Overview
The Senior Android Engineer is a leading velocity contributor for a cross-functional delivery Pod, responsible for shaping, reinforcing, and executing the technical direction of Android applications. They drive the design, implementation, and testing of high-quality, scalable mobile solutions, ensuring strong alignment with modern Android 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 Senior Android 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 Android platform, championing technologies like Kotlin, Jetpack Compose, and Material 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 Hampton, NH or future Boston, MA 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 either office. Fully remote work is not available for this role.
Responsibilities
Technical Contributions

• Actively contributes to the design, implementation, and testing of Android applications using Kotlin, Jetpack Compose, 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 Android practices, including CI/CD, automated testing (unit and UI), observability, and performance monitoring.
• Champions Android platform excellence, including Material Design, accessibility, responsiveness, and device compatibility.
• Contributes to the Android 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 Android-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 Android 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 Material Design principles.
• Partners with backend and platform teams to ensure seamless integration and efficient, reliable releases (including Play 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 Kotlin, Compose, and modern Android 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 Android 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 Android applications in cross-functional teams
• Strong proficiency in Kotlin and modern Android development, including Jetpack Compose and core Jetpack libraries (ViewModel, Navigation, Room)
• Deep understanding of Android fundamentals (lifecycle, state management, coroutines, threading, performance optimization)
• Experience with modern architecture patterns (MVVM, MVI, Clean Architecture) and modularized codebases
• Experience with Android testing (Appium, JUnit, Espresso) and mobile CI/CD pipelines
• Familiarity with Material Design and building accessible, responsive UIs across diverse Android devices
• Experience integrating RESTful APIs and working with asynchronous patterns (coroutines, Flow); GraphQL is a plus
• Experience with mobile observability and monitoring tools (e.g., Firebase, Datadog)
• Knowledge of cloud platforms (AWS, Azure, Google Cloud Platform) and mobile-backend integration patterns
• Experience with Play Store release processes, versioning, and staged rollouts
• Knowledge of defining, measuring, and improving key Android performance metrics (e.g., startup time, jank/frame drops, ANRs, 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 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

Perks
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.
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: $120,000-$140,000
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.