SDE 3 (Backend)

We're looking for a strong backend engineer to join our Platforms/Supply team and build the core systems that power inventory, capacity, scheduling, and supply-side operations across Cult.fit - the backbone that our fitness centers, classes, trainers, and partner network run on. This is a senior IC role with real technical ownership — you'll help shape our supply platform charter across architecture, execution, and mentorship as the team scales. What You'll Do Design, build, and scale backend systems using Java and Node.js that power supply-side platforms inventory, capacity management, scheduling, and catalog systems. Own system design and architecture for critical services — scalability, reliability, and long-term maintainability. Build APIs and platforms that support trainers, centers, and partner onboarding/operations at scale. Drive performance and cost efficiency through smart data modeling, caching, and async processing. Ensure production readiness - testing, observability, monitoring, incident ownership Partner closely with Product, Operations, App/Web, Data, and Design to translate supply-side business problems into robust backend solutions. Mentor junior engineers through design/code reviews and hands-on tech leadership Use AI tools to boost developer productivity, streamline internal operational workflows, and cut manual effort. Help raise the engineering bar across the Platforms org. What We're Looking For B.Tech/M.Tech in Computer Science 6–8 years of backend engineering experience in production-grade systems Strong hands-on experience with Java (Spring Boot) or Node.js (NestJS/Express) Solid grasp of distributed systems, microservices, and API design Experience with relational + NoSQL databases (PostgreSQL, MySQL, DynamoDB, MongoDB) Experience with caching (Redis/Memcached) and event-driven/async processing Proven ownership of complex systems end-to-end Strong problem-solving, communication, and ownership mindset Comfortable in Agile/Scrum environments Good to Have Kafka, Pub/Sub, SQS, or other streaming/messaging systems Experience with capacity planning, scheduling engines, or inventory systems at scale Experience leading technical initiatives across teams