As a Software Developer, I contributed to the enhancement of the Mosambee payment service, a comprehensive mobile Point of Sale (POS) system that supports diverse payment methods, including card transactions, Bharat QR (BQR), Unified Payments Interface (UPI), and EMI options. My responsibilities included successfully migrating the legacy Jersey framework-based APIs to Spring Boot RESTful APIs, which resulted in improved performance, maintainability, and scalability. I worked on integrating multiple payment methods, ensuring seamless and secure transactions for cards, BQR, UPI, and EMI. Additionally, I implemented integrated payment solutions tailored for enterprise clients, enhancing their transactional capabilities and operational efficiency.

As a Java full stack developer worked on Osta. Osta is a cardless, walletless, swipeless, otpless solution. Osta acts as an aggregator / intermediary between Bank and Merchants to provide secured payment services similar to a payment gateway or POS based payments.Especially worked on Central Bank Of India fastag service. Developed RESTful API's. Developed customer fastag redelivery history API. Developed transactions report service. Integrated SMS service in project. Resolved Java heap issue on production server.