What was the situation?
Société Générale's BU MassMarketing ran on owned datacenters, carrying fixed infrastructure cost and limited elasticity.
What did ARCHITEKT do?
As CTO for the local entity on the engagement (2011-13), Erwan Deschamps led the migration from datacenters to AWS, re-basing the estate on cloud-based and API-based application patterns.
What changed, measurably?
The BU MassMarketing estate moved onto cloud and API-based services, and total cost of ownership fell by 37%.
Société Générale's BU MassMarketing left its owned datacenters for AWS without re-writing the business, so the estate ran on cloud and API-based services while total cost of ownership came down by 37%.
How does a bank move a business unit to the cloud?
The BU MassMarketing estate was re-based on cloud-based and API-based application patterns rather than lifted as-is, so infrastructure cost turned elastic instead of fixed, which is what cut total cost of ownership by 37%.