How Wragby Helped First Bank of Nigeria Modernize SuperApp on Azure Without Disruption

For more than a century, First Bank of Nigeria has been a trusted part of the country’s financial system. Today, that trust extends across more than 42 million customers, over 800 branches, and a growing network of digital channels where reliability is no longer just an operational requirement, but part of the customer promise. First Bank’s customer promise is tested most often through SuperApp. Customers use it to check balances, transfer funds, pay bills, access loans, receive notifications, and manage everyday banking activities. For many of them, the app has become the branch they visit most often.

The experience customers saw on the screen was being held back by the infrastructure underneath. SuperApp still depended on a legacy estate built around Oracle Exadata, VMware virtualisation, and tightly coupled on-premises infrastructure. Expanding capacity was becoming costly, recovery timelines were still measured in hours, and release cycles could not keep pace with what customers increasingly expected from digital banking. The pressure was most visible during salary periods and major retail campaigns. When transaction volumes spiked, response times rose to 4.2 seconds against a two-second target. At the same time, the bank was managing rising Oracle licensing costs, stronger expectations around resilience and security evidence, and increasing regulatory scrutiny on data governance and operational readiness. Modernisation was no longer optional, but it had to be handled with care. As one of Nigeria’s largest customer-facing digital banking platforms, SuperApp could not be disrupted during migration without affecting millions of customer interactions, delaying recovery during an incident, or weakening confidence in a service customers depended on daily. First Bank engaged Wragby to modernise SuperApp on Microsoft Azure without putting service continuity at risk. The assignment was not a lift-and-shift exercise; it was a controlled transformation of a critical banking platform into a more resilient, scalable, and governed environment for the bank’s next phase of digital growth.

SuperApp could not be moved to Azure as a routine infrastructure exercise. The service supported millions of customer interactions each day and sat at the centre of First Bank’s digital banking operations. Any change had to account for the customer channels, application services, and database workloads that depended on one another while keeping the service available throughout the programme. The scale of the challenge became clear in the estate Wragby and First Bank had to assess: 47 workloads and 18 databases running across a tightly connected Oracle and VMware environment. Azure Migrate and Azure Database Migration Assessment were used to map dependencies, identify migration candidates, and separate workloads that could be re-platformed from those that required deeper remediation before they could safely run in Azure. The readiness work had to extend beyond technology into governance and risk. SuperApp operated in a regulated banking environment, where resilience, security, and control evidence could not be added after the fact. To reduce operational and regulatory risk, Wragby and First Bank followed a structured migration process covering stakeholder alignment, readiness assessments, architecture reviews, risk workshops, approval gates, and controlled cutover planning before any production move began. By the time implementation began, the programme had already removed much of the avoidable risk. Because risk had been addressed before implementation, the migration was completed with zero unplanned customer-facing downtime.

Wragby designed the solution around three pressures First Bank could not separate: peak-demand scale, data-layer resilience, and control in a regulated banking environment. The scale pressure was visible whenever customer demand surged. Wragby modernised the application platform on Azure Kubernetes Service (AKS), moving more than 32 microservices supporting payments, accounts, transfers, notifications, and integrations onto a containerised environment that could scale with customer demand rather than fixed infrastructure capacity. The data layer carried a different kind of operational risk. Oracle Exadata had become one of SuperApp’s largest cost drivers and one of its most important recovery dependencies. Wragby migrated the data layer to Azure Database for PostgreSQL Flexible Server with cross-region replication, reducing Oracle dependency while giving the bank a recovery model better suited to SuperApp’s daily transaction volume. For a regulated banking platform, control could not be added after the architecture was built. Wragby implemented a Zero Trust architecture using Microsoft Entra ID Workload Identity, Azure Key Vault, Private Endpoints, and network segmentation controls, helping reduce credential exposure, keep sensitive services private, and provide clearer operational evidence for security and regulatory reviews. The same focus on control carried into how software reached production. Azure DevOps, GitOps delivery, automated deployment controls, and operational dashboards gave teams better visibility into application health, platform performance, and security posture while reducing the operational risk associated with change. The modernised environment is now creating room for more advanced use cases — a real-time fraud-detection workload is already running in production, while customer-service copilots, KYC document intelligence, and branch-operations automation remain planned for future phases.

After the migration, SuperApp was no longer constrained by the limits of its legacy environment. Customers experienced a faster and more stable service, technology teams gained more control over releases and recovery, and the bank could demonstrate resilience and compliance with clearer operational evidence. At roughly 12 million transactions a day, even small performance gains mattered at national banking scale. Mobile application crash rates reduced by 78%, and digital-service-related call-centre volume fell by 34%, easing pressure on support teams while improving the everyday customer experience.

First Bank’s experience reflects a wider challenge across regulated industries. Many organisations still rely on legacy virtualisation environments, absorb high Oracle licensing costs, and face rising expectations for resilience, security, and regulatory compliance. Modernising critical platforms is rarely simple because the services customers depend on cannot be taken offline while systems are rebuilt. The migration reinforced a lesson that applies well beyond First Bank: technology decisions create lasting value only when they are matched with delivery discipline. Readiness assessments, approval checkpoints, deployment controls, security baselines, operational runbooks, and governed cutovers helped reduce migration risk while keeping customer services available. For First Bank, the outcome was a stronger digital banking platform delivered without interrupting the customers who relied on it every day — improved resilience, accelerated software delivery, reduced operating costs, and strengthened security and governance, all achieved with zero unplanned customer-facing downtime. Ready to modernize a critical platform without disrupting the customers who depend on it? Book a cloud discovery session with our experts.