Sr Software Engineer - Backend

ClassPass, part of Playlist, provides a platform for discovering fitness, wellness, and other real-world experiences. The Senior Backend Software Engineer will build and evolve reliable, scalable backend systems and APIs, collaborate across functions to deliver features, and contribute to architecture, operational health, and team development.

Responsibilities:

• You’ll help build and evolve the backend systems that power ClassPass, partnering closely with Product, Design, and QA to take ideas from concept to production in a way that’s reliable, scalable, and grounded in real customer needs
• Partner with Product, Design, and QA to deliver features from ideation through deployment, iterating based on feedback and outcomes
• Design and develop backend services and APIs that are robust, maintainable, and easy to work with
• Promote engineering excellence through automated testing, thoughtful code reviews, and effective monitoring
• Drive simplicity by reducing unnecessary complexity while maintaining reliability and quality
• Contribute to architecture decisions and help shape how microservices interact across a growing service-oriented ecosystem
• Strengthen operational health by identifying risks early and improving observability and resilience over time
• Lead with curiosity by seeking feedback, learning from diverse perspectives, and mentoring teammates
• Help foster a collaborative team culture that values autonomy, accountability, and impact

Requirements:

• Senior-level experience (8+ years) building and operating backend systems for large-scale SaaS platforms
• Proficiency in object-oriented languages such as Java, Kotlin, C#, and comfort working in a mixed stack
• Experience architecting and designing backend services in a microservices environment
• Familiarity with monitoring tools like New Relic or Kibana, and a proactive approach to identifying and mitigating system risks
• Solid understanding of SDLC, design patterns, and Agile methodologies
• Strong SQL and relational database skills, with attention to performance and maintainability
• Clear communicator who collaborates effectively across roles and working styles
• Motivation to deliver meaningful solutions, keep learning, and support others' growth
• Backend languages: Java, Kotlin, C#, Javascript, React
• Architecture: microservices, service-to-service integrations
• APIs: backend services and APIs
• Data: SQL, relational databases
• Observability: New Relic, Kibana
• Engineering practices: automated testing, code reviews, monitoring and alerting