How modern data foundations turn inclusive lending into a scalable growth engine

Inclusive lending is often discussed in the language of products, policy and customer experience. But for banks and building societies, the real constraint is usually architectural. Serving borrowers with more complex needs requires more than a new proposition. It requires a digital foundation that can support nuance, guidance, speed and control at the same time.

That is what Nationwide Building Society’s broader transformation journey makes clear. Its Later Life Lending proposition for people over 55 was not only a product innovation. It was the outcome of deliberate modernization across cloud infrastructure, data access, integration patterns and operational processes. By building a cloud-native foundation, introducing event-driven architecture and standardizing access through reusable APIs and microservices, Nationwide created the conditions to launch a specialist mortgage experience without overloading legacy systems or compromising resilience.

Traditional mortgage journeys are typically designed around standard borrower profiles and relatively linear flows. But that model breaks down when lenders want to serve customers whose needs are more varied, more advisory-led or more operationally complex. Later-life borrowers are a strong example. People over 55 may be looking to unlock housing value for home improvements, debt consolidation, family support or lifestyle goals. Yet this segment has historically had fewer borrowing options and often needs more support to understand which route is right for them.

Experiences like these cannot rely on a simple digital funnel alone. They must balance self-service with specialist guidance, present a fuller view of customer circumstances and support multiple repayment types without creating fragmentation behind the scenes. On a brittle legacy estate, that can become slow, expensive and risky. On a modern platform, it becomes a design and execution challenge the organization is equipped to meet.

At Nationwide, modernization began with a stronger platform foundation. Publicis Sapient helped migrate key Engage and Originate journeys to the organization’s Cloud Center of Excellence, moving them onto a cloud-native, containerized platform powered by AWS. The broader Nationwide Digital Accelerator Platform was built around code-first, automation-first and security-first principles, creating a consistent and repeatable infrastructure with shared services, security controls and improved audit trails.

This matters because a modern proposition rarely emerges from a blank sheet of paper. It depends on how quickly teams can stand up environments, apply proven controls, onboard new journeys and reuse what already works. Nationwide’s cloud migration was completed with zero downtime and in half the original migration timeline. Just as importantly, the program created reusable components, templates, documentation and governance models that lowered the effort required to launch future services.

That is the difference between cloud as infrastructure and cloud as an innovation engine. When platform capabilities are reusable, product teams can focus less on rebuilding plumbing and more on designing experiences that fit new customer needs.

Nationwide’s Later Life Lending platform shows what happens when that foundation is applied to a specific business opportunity. Built in just 10 months, the platform enabled three later-life mortgage products: Retirement Capital and Interest, Retirement Interest Only and Lifetime. It gave mortgage consultants access to an online application that presented a holistic view of each member’s situation and options, helping them guide customers through significant financial decisions with more clarity and confidence.

Crucially, the platform was underpinned by an event-driven architecture—the first ever at Nationwide. That was not a technical flourish. It gave the proposition the reliability, resilience, availability and agility needed for a complex, high-consideration lending journey. Event-driven design makes it easier to connect customer actions, advisor interventions and operational processes without tightly coupling every change to a monolithic back end. For lenders, that means specialist journeys can evolve faster, support more exceptions and remain more resilient as demands change.

The business impact was substantial. The program opened a new revenue stream for Nationwide while making later-life borrowing more accessible and understandable. It generated around 32,000 inquiries, 7,686 mortgage applications and 5,749 mortgage completions. Industry response described the suite as a benchmark and ahead of the market in the way it created a single process across repayment types.

Launching a specialist proposition is one thing. Sustaining it across channels and operations is another. That is where Nationwide’s modern data foundation becomes especially important.

Publicis Sapient worked with Nationwide to develop Speed Layer, a near real-time cache built on a modern technology stack that captures changes from legacy systems of record using change data capture and streaming technologies. Data is stored in a highly scalable layer structured for consumption, then made available to applications through microservices and APIs. This standardizes access across digital channels and reduces direct dependence on core systems.

For lending leaders, the significance is strategic. A resilient data layer decouples customer-facing innovation from the slower cadence of legacy change. Product teams can introduce new journeys, enrich experiences and expose data where it is needed without forcing every front-end improvement through the core estate. That enables a two-speed model in which digital capabilities move at market pace while core platforms continue to evolve with the control appropriate to a regulated institution.

The technical outcomes show the strength of that model: microservices response times of 7 milliseconds, daily reconciliation of around 300 million records in less than 45 minutes, more than 95% automated test coverage and about £4 million in infrastructure savings. Beyond performance, Speed Layer created a digital services ecosystem designed to stay online and resilient to outages while enabling future innovation such as real-time notifications, personalized products and fraud monitoring.

Inclusive lending is not about removing people from the journey. It is about placing human expertise where it adds the most value and letting technology do the rest. Nationwide’s Later Life Lending experience is a good example of that balance. Customers gained a simpler digital way to understand their options, while specialist advice remained within reach through consultants equipped with a more complete, joined-up view of the member’s circumstances.

This kind of hybrid experience depends on more than a polished front end. It requires APIs, microservices and shared data services that can connect channels, advisors and operations teams in a secure and consistent way. It also requires automation in the back office so specialized propositions do not become operational bottlenecks. In Nationwide’s case, back-office processes were automated so business operations teams could handle more cases, helping the proposition scale while preserving service quality.

For banking and mortgage leaders, the lesson is clear: resilient platforms are not just about uptime. They are about optionality. They give institutions a safer, faster way to create propositions for underserved or more complex customer groups without destabilizing the wider organization.

Nationwide’s journey shows how the pieces fit together. Cloud-native infrastructure created a secure, repeatable environment for digital delivery. Reusable components and governance models reduced the friction of launching new journeys. Event-driven architecture enabled adaptive specialist flows. A near real-time data layer standardized access to critical information and decoupled innovation from legacy constraints. Automation increased operational capacity. Together, those capabilities made Later Life Lending possible—not as an isolated success, but as a business outcome of modernization done with purpose.

That is the real opportunity for lenders today. When digital foundations are designed for resilience, governance and reuse, they do more than support the business. They expand what the business can responsibly offer. And in a market where growth increasingly depends on serving a broader range of customer needs, that makes platform modernization one of the most important proposition decisions a lender can make.

Relevant Links

• Speed Layer for Nationwide Building Society
• Speed Layer for Nationwide Building Society
• Cloud modernization for always-on financial services
• Resiliency Engineering in Financial Services: A Playbook for Modernizing Without Compromising Trust
• Modernize Insurance with Real-Time Data Streaming—Without Replacing Core Systems All at Once
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• Resiliencia digital para la banca en México: cómo modernizar sin poner en riesgo la continuidad (LATAM)
• FAQ (FAQ)
• 12 Things Buyers Should Know About Publicis Sapient’s Work With Nationwide Building Society (LIST)