Core Banking Migration and Target Architecture for a Leading Nordic-Baltic Bank
A phased Oracle FLEXCUBE upgrade, a modernised enterprise architecture and the first governed domains of a Data Mesh - sequenced and delivered as one programme.
Project Impact & Velocity
Delivered as one programme, against a committed date.
The challenge
A live core, three markets, no room for a long outage.
Years of local customisation had pushed the Oracle FLEXCUBE estate a long way from a standard install. Every new product feature meant another patch; every patch made the eventual upgrade heavier. The board had already decided to move onto a current core release and to use that move to correct the architecture around it.
What nobody could answer was the sequencing — how to upgrade a live, multi-market core, in markets that never stop taking payments, without a multi-day outage and without asking the business for a date it could not defend. The question was never whether to migrate. It was how to make the committed timeline real.
What we did
One programme across sequencing, architecture and data.
The Outcome
A live, multi-market core migrated by the bank's own engineers — against a date they could finally defend, with the first governed data domains live alongside it.
5 domains
Data products live across five governed domains, each with owned metadata and column-level lineage.
1 blueprint
One reference model every workstream designed against — core and everything that touches it.
Why it worked
Where the execution edge came from.
Technologies & standards
Target architecture
One reference model spanning the core and its surrounding systems
Data governance
Ownership rules embedded in the delivery pipeline
Metadata management
Owned metadata on every key data product
Cloud data platforms
Analytical and operational ports for each products
Data Mesh
Data products live across governed domains
Column-level lineage
Every data product traceable to source
Programme & PMO governance
One reporting cadence across all workstreams
Tooling
Delivered on the FLEXCUBE core banking platform