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Payment Systems Modernization and Financial Technology Architecting the Future of Real-Time Payments: Cloud-Native Transformation of Legacy Banking Infrastructure

Author(s) Naresh Reddy Telukutla
Country United States
Abstract The transformation of legacy payment infrastructure into a cloud-native, microservices-based architecture represents one of the most consequential shifts in modern banking technology. Financial institutions across the United States increasingly confront ageing systems that constrain throughput, introduce settlement risk, and limit participation in emerging real-time payment networks. This article addresses the technical, operational, and strategic dimensions of payment platform modernisation, drawing on implementations supporting Zelle, Real-Time Payments (RTP), Automated Clearing House (ACH), and internal transfer operations. The central argument holds that durable payment modernisation requires full-stack architectural rethinking—not incremental patching—to unlock the performance characteristics demanded by contemporary transaction volumes, including the capacity to sustain 15,000 immediate payment transactions per minute while maintaining sub-second settlement latency. These outcomes emerge from deliberate architectural decisions encompassing horizontal scaling patterns, event-driven communication between decoupled services, optimised connection pooling, and distributed design that eliminates single points of failure. The practical significance extends beyond internal efficiency: institutions that successfully modernise position themselves to absorb new payment rail integrations without architectural disruption, reduce time-to-market for financial products, and build competitive foundations for instant payment ecosystems.
Keywords Payment Modernization, Real-Time Payments, Cloud-Native Architecture, Microservices, Legacy Transformation.
Field Engineering
Published In Volume 6, Issue 4, April 2025
Published On 2025-04-03
DOI https://doi.org/10.70528/IJLRP.v6.i4.2100
Short DOI https://doi.org/hbwsf6
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