Building a Secure, Resilient AWS Cloud Foundation for a Growing Financial Services Business

The Problem

The organisation did not simply need infrastructure in the cloud. It needed a governed cloud operating model.

• Capacity planning depended on purchasing infrastructure ahead of demand.
• Customer-facing applications were vulnerable to traffic spikes and infrastructure bottlenecks.
• Disaster-recovery processes relied heavily on manual intervention.
• Development, test and production environments were not consistently governed.
• Security controls differed across workloads and teams, while monitoring remained fragmented.
• Legacy databases and tightly coupled applications made cloud migration risky.
• Management wanted greater visibility of cloud cost before scaling adoption.

The Solution

iTANZ designed a phased AWS transformation that separated cloud foundation, migration and application modernization rather than attempting a high-risk big-bang move.

• Established a governed AWS landing zone with multi-account architecture, identity controls, network segmentation, logging, backup policies and tagging standards.
• Connected AWS securely to the existing data centre so dependent workloads could move in controlled stages.
• Assessed applications and databases by business criticality, dependency, complexity and cloud suitability before migration waves began.
• Used runbooks, replication, cutover testing, rollback planning, data validation and performance validation before production transition.
• Redesigned customer-facing applications around Multi-Availability-Zone deployment, load balancing and Auto Scaling.
• Embedded least-privilege access, threat detection, encryption, monitoring, backup and web-application protection into the target architecture.
• Introduced observability and cloud-cost governance so workloads could be reviewed for utilisation, sizing and lifecycle optimisation after migration.

Impact We Created

The Conclusion

Successful cloud transformation is not measured by how many servers move to AWS. It is measured by whether the organisation becomes more resilient, more governable and easier to scale after the migration than it was before it.

Source basis: iTANZ AWS illustrative financial-services case-study content. Publishing note: this is an illustrative solution scenario and should not be presented as a verified customer success story until supported by an approved customer reference.