
He left a software job in Los Angeles for Kolkata in 1987. The company he founded went on to help engineer UPI, bill payments and fraud systems used at national scale - and now he is trying to make those rails travel.
RS Software is a payments-focused technology company headquartered in Kolkata, India, with a US office in Milpitas, California. Founded by Raj Jain, the firm has spent more than three decades building payment infrastructure for banks, processors, networks and central institutions. It is the team that engineered core pieces of India's public payments stack, including the Unified Payments Interface (UPI) and the Bharat Bill Payment System (BBPS) for NPCI, and today offers a suite of cloud-native, API-led products for real-time payments, bill payments, switching, fraud and risk under a Payment Platform as a Service model.