Context
A payment institution ran its core application on ageing servers, hitting capacity limits at every month-end peak. Backups had never been restored under real conditions and any hardware incident threatened service continuity.
The challenge
Migrate to the cloud with no service interruption and no sovereignty compromise: sensitive data encrypted with keys under the institution's exclusive control, contractual reversibility and regulator-ready compliance.
Our approach
- 01
Data and flow classification: what can migrate, under which encryption conditions, what stays local.
- 02
A landing zone secured from day one: identity, network segmentation, centralized logging, automated guardrails.
- 03
Systematic encryption with BYOK key management, and a multi-zone architecture with tested automatic failover.
- 04
Wave-based migration with double validation runs, a full dress rehearsal of the final cut-over, and a documented reversibility exercise.
Results
Cut-over happened over a weekend with no customer incident. Measured availability of 99.9% over the following twelve months, infrastructure costs down ~35%, and peak loads absorbed without intervention. The architecture file was presented to the regulator without reservation.
