Banking & Financial Services

Enterprise architecture provides the blueprint for core banking modernisation — documenting the current-state system landscape, defining the target architecture, and designing the migration path between them. Without a robust EA foundation, core banking programmes frequently encounter unexpected integration dependencies, data quality issues, and scope creep. Portamus uses TOGAF-structured assessments to surface these risks before the programme begins.

We help banks translate regulatory requirements into architecture decisions — documenting IT landscapes, designing control frameworks, and producing the evidence packages regulators and internal auditors expect. For DORA operational resilience requirements, we map critical business services to their underlying IT components and design the documentation and testing architecture needed for compliance.

Yes. Fintech integration and digital banking M&A are areas where EA is especially valuable. We design the integration architecture, define API contracts, and produce the target-state operating model before any technical implementation begins — reducing the risk of fragmented integration that becomes a long-term liability.

Open banking architecture refers to the technical and governance design of API infrastructure that enables third-party access to financial data and services under PSD2 and emerging open finance frameworks. We design API gateway architectures, consent management platforms, and developer portals that allow banks to participate in the open finance ecosystem while maintaining control over data access and security.

A focused banking EA assessment covering core systems, digital channels, and integration architecture typically takes six to eight weeks for a regional bank or specialist institution. Larger universal banks or post-merger environments may require a phased approach over three to four months, covering individual business domains in sequence before synthesising findings into an enterprise-wide architecture roadmap.