Backend Developer

What you'll do

• Design, build, and maintain scalable, secure REST APIs in .NET Core that support our Angular web app and Flutter mobile app
• Architect data models and optimize query performance in MySQL, keeping data isolated and available across a multi-tenant platform
• Build and maintain event-driven services with Apache Kafka to keep data in sync across our integrated systems in real time
• Lead the technical build-out of core features, including cross-club access, retail workflows, and global integrations
• Use AI coding tools to speed up development, while owning the maintainability, security, and architecture of everything you ship
• Grow automated test coverage across backend services to keep releases stable and regression-free
• Review code, unblock the backend team on hard problems, and set the standard for clean, maintainable engineering

What you'll bring

• 6 to 8 years of backend engineering experience, ideally in a SaaS product
• Deep hands-on expertise in C# and .NET Core
• Experience using AI coding assistants in production work, with the engineering fundamentals to review, refactor, and stand behind AI-generated code
• Strong relational database skills, including schema design, transactions, and query optimization in MySQL
• Experience building multi-tenant systems and working with event-streaming platforms like Kafka
• A track record of building secure, well-versioned APIs and untangling complex business logic

Nice to have

• Familiarity with Docker, container registries, and standard CI/CD pipelines
• Experience in the fitness, club management, or membership software industry
• Exposure to how backend APIs connect with Flutter and Angular front ends