Case Study: Multinational Bank achieves rapid global API delivery and 7X faster performance with OpenLegacy

Top 10 Global Bank Uses OpenLegacy to Implement Six Key Global APIs and Microservices in Just Two Weeks

Multinational Bank, a top 10 global bank with operations in more than 70 countries, needed a faster way to deliver global digital services across highly fragmented legacy systems. Its IT teams were stuck with a backlog of 100+ APIs and slow, siloed development using an existing API orchestration product that could not easily expose AS/400 and mainframe functionality.

OpenLegacy helped Multinational Bank simplify its architecture by directly exposing core transactions as lightweight Java microservices and REST APIs, removing middleware layers and legacy channel logic. Using OpenLegacy, the bank created key APIs in just two days instead of 5–7 weeks, and transaction response times improved 7X, from 350ms to 50–70ms.