TransUnion
Platform Engineering & API Modernisation
Engineering squads accelerating TransUnion's technology programmes across Open Banking, API modernisation and cloud migration. Autonomous delivery across multiple workstreams.
The Challenge
TransUnion, operating in over 30 countries, faced mounting pressure across multiple strategic technology initiatives simultaneously. Their Open Banking capabilities needed acceleration, legacy API systems required modernisation, and cloud infrastructure demanded migration, all whilst maintaining the reliability and compliance standards expected of a global credit reference agency handling sensitive financial data.
Legacy API Modernisation
The Call Report system, a core product handling millions of data requests, needed replacing with a modern Combined API service enriched with data from TrueVision, requiring reverse-engineering of complex legacy business logic.
Open Banking Acceleration
An ambitious roadmap with multiple strategic initiatives competing for specialist engineering capacity needed acceleration without compromising quality or compliance.
Cloud Migration
Infrastructure supporting products processing 2.4 million messages daily needed migrating between cloud platforms whilst maintaining performance and data integrity.
Our Approach
We deployed full stack engineering squads embedded within TransUnion's existing teams, providing additional capacity across multiple programmes. Engineers took full ownership of deliverables, working autonomously within established processes. The model combined hands-on API development with exploratory analysis of legacy systems, ensuring new services faithfully replicated and enhanced existing business logic.
Technical Solution
Combined API Development
Back-end engineering creating new services to replace legacy Call Report system, enriched with TrueVision data
Legacy Reverse Engineering
Exploratory analysis of existing Call Report systems to reverse-engineer and modernise complex business logic
.NET Core Backend
C# .NET Core services powering Open Banking capabilities and API infrastructure
Cloud Platform Migration
TrueVision and Affordability platform migration to Azure Service Fabric with .NET 8 upgrades
Autonomous Squad Model
Two self-managing engineering teams integrated into TransUnion's delivery processes and ways of working
Test Automation
Selenium, SpecFlow, and RestSharp ensuring quality across releases in a highly regulated environment
The Impact
The squads accelerated TransUnion's technology programmes across multiple fronts. The Combined API service began replacing legacy Call Report functionality with modern, enriched data services. Open Banking capabilities were expanded with strengthened API infrastructure and new third-party banking connections. A consolidated reporting dashboard launched, providing unified visibility across operations.
Cloud migration work upgraded core platforms to .NET 8 on Azure Service Fabric, modernising infrastructure supporting millions of daily transactions. The autonomous delivery model proved that specialist squads could integrate cleanly and deliver at pace within established, compliance-heavy processes.
I cannot recommend this partnership highly enough, they take the time to understand a business, its culture, growth plans and pain points and come up with innovative solutions to really drive digital transformation.
TransUnion
Long-Term Value
Modernised API Infrastructure
TransUnion's core data services are being rebuilt on modern foundations.
- •Legacy Call Report system being replaced with enriched Combined API services
- •TrueVision data integration expanding product capability
- •.NET 8 upgrades on Azure Service Fabric improving performance and maintainability
Proven Delivery Model
The engagement established a template for scaling specialist capacity in regulated environments.
- •Autonomous squads demonstrated seamless integration with compliance-heavy processes
- •Parallel execution model enabling faster roadmap delivery across multiple programmes
- •Engineering capability transferred through embedded working practices
Related Capabilities
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