Backend Developer

Company Description

Quantum Heaps is building the future of unified revenue execution for the AI-first era. We are creating an intelligent operating system for modern go-to-market teams bringing sales, marketing, customer engagement, and intelligence into one seamless platform.

What You Will Do

• Design and implement scalable backend services using Node.js and Express.
• Architect and optimize data models in MongoDB for high-performance transactional and analytical workloads.
• Build secure, versioned RESTful and/or GraphQL APIs consumed by React frontends and AI services.
• Design event-driven and asynchronous workflows using queues, background jobs, and streaming patterns.
• Develop and maintain microservices that integrate AI workflows into the platform.
• Implement caching strategies (Redis or similar) for performance optimization.
• Ensure system reliability, scalability, and fault tolerance in production environments.
• Improve CI/CD pipelines, observability, logging, and monitoring practices.
• Collaborate with frontend engineers, product, and AI teams to define clean service contracts.
• Drive backend architecture decisions aligned with long-term scalability and maintainability.

What You Bring

• Backend engineering experience building production SaaS platforms.
• Deep expertise in Node.js, Express.js, JavaScript/TypeScript, and backend design patterns.
• Strong experience with MongoDB including schema design, indexing, aggregation pipelines, and performance tuning.
• Experience building scalable REST or GraphQL APIs.
• Solid understanding of authentication/authorization (JWT, OAuth, RBAC).
• Experience with AWS infrastructure (EC2, S3, Lambda, RDS, etc.).
• Hands-on experience with Docker, Kubernetes, and CI/CD pipelines.
• Strong knowledge of system design, distributed systems fundamentals, and API security best practices.
• Experience with performance optimization, caching, and database query tuning.
• A product mindset and ability to translate complex requirements into reliable backend systems.

Bonus Points

• Experience with event-driven architectures (Kafka, RabbitMQ, or similar).
• Experience integrating AI frameworks or working with LLM APIs.
• Familiarity with PostgreSQL or hybrid database architectures.
• Experience building complex B2B systems (CRM, GTM, analytics, revenue operations).
• Exposure to observability tools (Datadog, Prometheus, OpenTelemetry).