Backend Engineer - Node.js / Express.js

Description : About Luna :

Luna is a health-tech company reimagining personal health through an integrated ecosystem of hardware, software, and intelligence. At its core is LifeOS, Lunas adaptive health operating system that interprets biometric data from the Luna Ring and other future devices to deliver real-time guidance on energy, circadian rhythm, and recovery. With science-first design and a global user base, Luna aims to make precision health both accessible and aspirational.

Location : Gurgaon

About the Role :

You will work closely with product managers, AI engineers, and frontend / mobile teams to craft APIs, optimize performance, and ensure seamless user experiences across the platform.

Responsibilities :

• Designing, developing, and maintaining scalable backend services using Node.js.
• Integrating OpenAI APIs, embeddings, vector stores, context / memory frameworks, and other LLM-powered features.
• Building reliable, secure, and well-documented REST / GraphQL APIs.
• Architecting backend systems that support millions of requests with high reliability.
• Writing clean, modular, and testable code with strong attention to performance.
• Working with cross-functional teams (Product, AI, Mobile / Web) to bring new features to life.
• Maintaining database models, optimizing queries, and ensuring high availability.
• Implementing monitoring, logging, alerting, and observability for backend services.

Requirement :

What We Offer :

(ref : hirist.tech)