Leeds Building Society pilots digital savings product on Mambu platform

By Gloria Methri

Leeds Building Society has gone live with a pilot digital savings product on Mambu’s cloud-native core banking platform, marking a major milestone in its digital transformation journey.

This launch is part of a multi-year core modernisation programme aimed at replacing the society’s legacy core system, which has been in place for over two decades. The pilot savings product is the first phase of the broader initiative, with plans to migrate its mortgage offering to Mambu’s platform. The go-live, achieved in under a year, reflects Leeds Building Society’s commitment to delivering faster, more agile financial services that align with changing member expectations.

By leveraging Mambu’s composable cloud banking architecture, the building society is positioning itself to offer more seamless and responsive digital experiences. The move aligns with broader industry trends, as more building societies and traditional financial institutions are shifting away from monolithic legacy systems toward flexible, API-enabled platforms.

The collaboration with Mambu signals growing momentum within the mutual and building society sector to embrace digital-first banking models. It also highlights the potential for cloud-native platforms to future-proof traditional financial organisations amid rapidly evolving customer needs and regulatory landscapes.

“Our partnership with Mambu continues to go from strength to strength. We have spent the past year building the engineering foundations for a complete overhaul of our technology, and we are delighted to see it being used for live savings accounts. These foundations provide the sustainability we need to support our one million members and the £30 billion of their money we manage, while also giving us the flexibility to continue helping more people into home ownership. Partnering with Mambu provides us with a solution that brings the best composable architecture and cloud technology, coupled with innovative functionality that matches the very best in the industry. This strategic move will enable us to spend more time enhancing the lives of our members and less time worrying about our legacy technology. We are looking forward to the following steps on our journey together,” said Rob Howse, Chief Operating Officer, Leeds Building Society.

“Leeds Building Society’s move to Mambu is a landmark moment for both the organisation and the building society sector at large, reflecting our strengthening presence in the industry and our strong track record of providing transformative solutions to banks, fintechs, and other financial services organisations across the UK. We are proud to support Leeds Building Society on its digital transformation journey. Our proven platform and solution will strengthen the Society’s operational resilience and efficiency, gaining enhanced capability to provide innovative mortgage and savings products to support its purpose of putting homeownership in reach of more people,” said Mark Geneste, Chief Revenue Officer, Mambu.