rachit User

I’m a backend-focused software development engineer who builds scalable REST APIs and secure authentication systems. I use Node.js, Express, MongoDB, and Redis to deliver stateless, role-based access and production-ready API foundations.

In my current role, I’ve architected a scalable service-layer backend with sub-second REST API response latency for 500+ daily academic transactions. I engineered JWT authentication and RBAC authorization using centralized Express middleware across 15+ endpoints, and improved MongoDB performance by adding aggregation pipelines and compound indexes—cutting query execution time by 30%.

I also design systems for scale and reliability, supporting 1,000+ concurrent users through optimized MongoDB schemas, query patterns, and caching strategies. From asynchronous AI generation pipelines with BullMQ/Redis to secure document management and expense tracking, I’m driven by system design fundamentals, measurable performance gains, and secure, well-structured APIs.