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