Kroo
FintechStartupCloud-native credit decisioning for a digital-first bank
From blank sheet to production-grade credit decisioning in four months.
Engineering Facets
Accelerators
Capabilities
Designed and delivered ~20 microservices credit decisioning platform in 4 months
Event-driven, cloud-native architecture on public cloud
Single platform supporting multiple product types (overdrafts, loans, etc.)
Enabled rapid experimentation with lending journeys and risk strategies
“Building the right internal platform creates an enduring asset — buying a monolithic decisioning engine trades speed for future constraints.”
Context
The bank was pursuing a full licence and needed a modern lending stack that could support their first credit products and evolve with their roadmap. Buying a monolithic decisioning engine would trade speed for future constraints; building the right internal platform would create an asset. They chose to work with a small, senior Bugni Labs squad to co-create that platform.
The Challenge
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Design a credit decision runtime that could support multiple products and rapidly changing policies
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Achieve production readiness under tight regulatory and delivery timelines
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Maintain explainability across affordability, eligibility, credit scoring and limits
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Blend internal models, third-party scores and policy decisions into coherent journeys
Our Approach
Domain-driven design and service decomposition
Clear bounded contexts: applications, products, scoring, limits, decisions, fulfilment. Each context with its own models and APIs.
Event-driven microservices on cloud
Asynchronous processing for heavy or long-running work. Horizontally scalable stateless services for peak periods.
Business workflows with BPMN 2.0
Lenders could design product journeys (e.g. overdrafts vs. personal loans) with re-usable building blocks.
Observability and business metrics
End-to-end instrumentation for application drop-offs, decision times, policy overrides and exceptions.
Engagement Timeline
Domain Modelling
3 weeksDefined bounded contexts for applications, products, scoring, limits, decisions and fulfilment with clear API contracts.
Platform Build
10 weeksBuilt ~20 microservices with event-driven processing, BPMN workflows for product journeys, and end-to-end instrumentation.
Production Launch
3 weeksHardened for production, launched first lending products (overdrafts), and validated regulatory compliance and performance.
Outcomes
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Production-ready platform delivering the bank's first lending products within a four-month window.
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Single decisioning foundation for multiple product lines (overdrafts, personal loans, future products).
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The bank gained an internal asset that can adapt to changing risk appetite, regulation and growth.
Technologies & Patterns
What Our Client Said
“The engineering quality and clarity gave our auditors confidence from day one.”
“The speed of delivery improved because the complexity became clear.”
Want the full story?
Client names, detailed architecture diagrams, metrics, and implementation insights are available on request. We're happy to walk you through the engagement.