Integration and Automation for Legacy Banking

White paper overview

The research outlines a structured path to legacy banking system modernization without replacing existing core platforms. It covers 6 architectural patterns – from API layers to event-driven integration – plus 2 production cases. One describes a retail bank's 12-month transformation of integration around Temenos R13. The other focuses on optimizing transaction reconciliation for a US marketplace platform using WorldPay.

Who this paper is for

CTOs and heads of engineering

Exploring integration methods that preserve legacy system stability while supporting modern digital channels.

Compliance and operations executives

Implementing APIs and integration layers on top of legacy systems to meet PCI DSS, GDPR, and other regulatory mandates.

Digital transformation officers

Planning modernization initiatives that add value through microservices without full core migration.

Why this white paper matters

Legacy system transformation in banking directly impacts competitiveness. Full replacement carries significant cost and operational disruption risk.

Integration as a growth driver

Modern integration layers expose legacy functionality through RESTful APIs and event streams. Vendors modernizing legacy core banking systems can launch products without waiting for core system changes.

Compliance through architecture

PCI DSS requirements, client-side tokenization, and audit trails are enforced at the integration layer. Microservices reduce regulatory scope and certification complexity, embedding compliance into design.

Real-time experiences on batch systems

Caching and event streaming bring instant experiences while legacy cores run in batch. Events feed analytics platforms, removing mainframe constraints on digital performance – critical for banking legacy modernization.

Explore how modern architectures connect legacy systems with advanced technology stacks

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