Case Study: Large Retail & Commercial Bank achieves 40% more efficient feature delivery with Parasoft Service Virtualization

Large Retail & Commercial Bank Delivers Features 40% More Efficiently With Service Virtualization

A large retail and commercial bank in London with about 25,000 employees faced slow CI/CD and DevOps progress because a diverse application landscape — heavy mainframe use, an aggressive AWS migration, mobile initiatives, and many incomplete or inaccessible APIs (including Salesforce integrations) — created frequent downtime and blocked teams. Teams reported roughly five days of delay per month due to lack of data, outages, and unavailable environments, so the bank formed a service virtualization team to remove these bottlenecks.

After evaluating options, the bank implemented Parasoft service virtualization as a proof of concept and rolled it out across 20+ product teams and 100+ users in under eight months. The solution enabled early, isolated testing with synthetic data and virtual APIs, caught defects earlier, and removed dependencies on unavailable systems — resulting in 40% more efficient feature delivery, 6+ million transactions processed in eight months, 100+ services and thousands of datasets virtualized, faster development cycles, and lower testing costs.