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Case study · Financial systems

Migrating a platform nobody could afford to switch off

Founding Minds modernized a decades-old financial workflow platform through a phased migration, preserving existing business processes while introducing a modern interface, stronger authentication, and new integration capabilities, all while the platform continued serving its users.

The situation

The platform collected information from existing financial systems and handled payment collection and validation. Customers depended on it for ongoing operations, and its growing customer base expected enterprise capabilities that a decades-old system could not carry.

It had also stopped supporting modern browsers, so customers faced a growing risk of being unable to log in as their own IT policies moved on.

Where the judgement shows

What made it hard

Keeping the business running.

The platform handles payment collection and validation for a large, active customer base, so a disruptive cutover was not an option and service continuity was a requirement from the start. The migration was phased, and continuity shaped both the architecture and the release plan.

Preserving undocumented business logic.

The original maintainers had moved on and documentation was thin, in a technology that is difficult to maintain and increasingly hard to hire for. The behavior of the running application became the working specification for the business rules that had to survive modernization. Reading it carefully is how a rebuild avoids shipping something cleaner and subtly wrong.

Improving the experience without alienating users.

Users knew the old screens well. The new interface needed to improve usability while keeping established workflows familiar, and changes needed to be tested with real users before reaching everyone.

Building for growth and integration.

The customer base was growing throughout. The platform needed to support modern browsers, stronger authentication, and integration with customers’ own systems, which the old application could not offer.

What was built

A rebuilt platform, delivered through phased migration, in three parts.

Modernized application and UX

A redesigned interface with a centralized landing page surfacing the operational information that matters, one-click access to reports that previously took navigation to reach, and real-time alerts and notifications when tasks complete. Multi-factor authentication was added.

Integration-ready architecture

Third-party APIs let client systems interact with the underlying hub processes directly, so the platform can be connected to and not only logged into. In some cases this replaced custom file feeds entirely.

Controlled migration and rollout

Changes reached a test group before wider rollout, allowing the team to observe how the redesigned interface affected established workflows and collect feedback. This helped validate the changes before they became everyone’s experience.

Built on .NET with Azure DevOps, run as Agile.

What changed

A modern platform without starting the business over

  • Existing business workflows were preserved through phased modernization.
  • Users gained a redesigned interface and better access to operational information.
  • Third-party API integration enabled direct system-to-system communication, and some custom file feeds were eliminated.
  • The application gained multi-factor authentication and updated technology foundations.

The engineering decision that mattered

The team treated the existing application as a source of business knowledge, not simply obsolete technology. By preserving its critical rules and workflows while modernizing the surrounding architecture and user experience, the migration let the platform evolve without requiring customers to start again.

The sector: Financial Services → Next: Continuous visibility into aircraft turnaround operations →

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