• Developed a complete native journey for the Dealer Management System (FOS App) to create Current Accounts for Freecharge merchants with Axis Bank driving significant business growth.• Designed and developed RESTful APIs for DMS Backend, which is utilized by both Web & Mobile Application to manage agents providing services like loans, sound boxes, and collections to merchants.• Implemented a Payment Flow with dynamic QR generation via Freecharge Payment Gateway & Refund flow utilizing polling and webhook techniques.• Leveraged MongoDB Aggregation & Streams to improve response time by 10x for enhanced user experience & efficient memory utilization.• Developed a microservice utilizing Kafka for real-time location tracking of agents via lat-long data.

• Worked on Merchant OnBoarding Service utilizing Java, Spring Boot & MySQL, actively applying AOP, Multithreading & Concurrency principles.• Revamped API performance by integrating Redis and Spring Cache for caching, resulting in a remarkable 20x reduction in database queries and response time.• Optimized API performance by integrating pagination, filtering, and batching mechanism, optimizing data processing efficiency.