Senior Backend Developer (.Net)

You'll join Grip Technologies Pvt. Ltd., a Daxko subsidiary, working on FitnessForce, the club management platform used by gyms and fitness businesses around the world.About the roleFitnessForce runs the daily operations of gyms and fitness clubs globally, from member check-in to point-of-sale retail. As a senior backend developer on our core team, you'll own the services and APIs that keep this multi-tenant platform fast, secure, and reliable at scale.We build with AI as part of our everyday workflow. You'll use tools like Cursor to move faster, while staying fully accountable for the quality, security, and design of everything that ships.What you'll doDesign, build, and maintain scalable, secure REST APIs in .NET Core that support our Angular web app and Flutter mobile appArchitect data models and optimize query performance in MySQL, keeping data isolated and available across a multi-tenant platformBuild and maintain event-driven services with Apache Kafka to keep data in sync across our integrated systems in real timeLead the technical build-out of core features, including cross-club access, retail workflows, and global integrationsUse AI coding tools to speed up development, while owning the maintainability, security, and architecture of everything you shipGrow automated test coverage across backend services to keep releases stable and regression-freeReview code, unblock the backend team on hard problems, and set the standard for clean, maintainable engineeringWhat you'll bring6 to 8 years of backend engineering experience, ideally in a SaaS productDeep hands-on expertise in C# and .NET CoreExperience using AI coding assistants in production work, with the engineering fundamentals to review, refactor, and stand behind AI-generated codeStrong relational database skills, including schema design, transactions, and query optimization in MySQLExperience building multi-tenant systems and working with event-streaming platforms like KafkaA track record of building secure, well-versioned APIs and untangling complex business logicNice to haveFamiliarity with Docker, container registries, and standard CI/CD pipelinesExperience in the fitness, club management, or membership software industryExposure to how backend APIs connect with Flutter and Angular front ends