Legacy ASP.NET to cloud migration case study

The situation

The client's customer acquisition platform ran on an on-premises Windows Server 2008 environment: IIS 7 hosting a proprietary ASP.NET application, on-premises Exchange handling email integration, and a SQL Server 2008 database approaching the end of its support lifecycle.

The infrastructure was increasingly costly to host and maintain. Deployments were manual, scalability was limited, and security exposure was growing quietly in the background. Shipping new features against the aging stack had become slow and risky — exactly the kind of drag that compounds until it can't be ignored.

Before and after

The stack, side by side.

The approach

Rather than lifting the existing application onto another Windows server, the platform was rebuilt on modern architecture: a new customer-facing frontend on a modern JavaScript framework, a lightweight API to handle customer submissions, and a full data migration from SQL Server to PostgreSQL — records were cleaned and validated during the move rather than copied over as-is.

Core business workflows were recreated in the new application, then deployed to modern cloud hosting with automated deployment and monitoring in place of manual server updates. The cutover happened with minimal downtime: the business kept accepting new customer registrations throughout the transition.

The result

Aging on-premises infrastructure was replaced with cloud-hosted infrastructure that's more reliable and easier to secure. On-prem server maintenance was eliminated entirely, updates that used to require manual server work now ship through an automated pipeline, and the platform runs on current frameworks and managed services rather than software that had outlived its support window.

The result is a lower-complexity, lower-cost platform positioned to scale with the business rather than constrain it.