Case Study: Premier European Bank achieves microservice delivery in days instead of months with OpenLegacy

Leading European bank uses our IMS DC Connector to deliver microservices into the cloud in days instead of months

Premier European Bank, a large Netherlands-based bank operating in 15 countries, needed to speed up digital transformation and open banking initiatives while modernizing core IBM z/OS IMS DC mainframe systems. Its outsourced, multi-vendor IT model and slow 2–3 month release cycle made new microservice APIs take 3–4 months to deliver, creating major time-to-market challenges.

OpenLegacy implemented its IMS DC Connector to directly expose mainframe workflows as microservice APIs without middleware, enabling the bank to create and deploy three core APIs in a single day. The results were significant: API delivery dropped from months to days, training took just three days, and Premier European Bank gained faster cloud deployment on AWS, improved agility, and quicker delivery of new services and partnerships.