Rishika Mandal

I’ve built backend systems for HRMS, Payroll, E-commerce, and FantasySports using Node.js and Express.js, including 20+ REST APIs for employee management, payroll processing, and user authentication. At DinoustechPvt.Ltd., I also implemented Redis caching to improve API response time by up to 60% and reduced database load.

I’ve integrated Apache Kafka for asynchronous event processing and real-time notification services, and I’ve optimized MongoDB queries using indexing and aggregation pipelines to keep performance steady. I’ve worked closely with frontend, QA, and business stakeholders in Agile sprints, while debugging production issues and shipping features on time.

At IMG Global InfotechPvt.Ltd., I developed scalable backend services for Fantasy Sports and E-commerce with Node.js, Express.js, and MongoDB. I implemented JWT authentication with role-based authorization, integrated third-party APIs and payment gateway APIs, and used Redis caching plus Kafka-based messaging to improve performance and scalability.