From legacy to composable: The credit union playbook for core banking transformation

Playbook

The credit union playbook for core banking transformation

A strategic guide to innovation and member value

Credit unions are under mounting pressure. Many still run on legacy core systems that are up to 40 years old. Even though 82% of executives say creating a fully digital experience is critical, only 9% have the tools to deliver it. To protect member loyalty and fuel growth, they must boldly reimagine the digital journey.

Our latest playbook shows how to break free from legacy technology, attract the next generation of members, and build a future-proof foundation for growth.

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The future of credit unions will depend on core transformation

With legacy cores slowing innovation and younger members ready to switch for a better digital experience, credit unions can’t afford to stand still. Every delay risks losing ground to faster, more agile competitors.

Download our playbook to see how to move from legacy to composable banking and why acting now is critical. The playbook focuses on:

The competitive, demographic, and technological shifts putting credit unions under pressure to modernize

Practical steps and proven approaches for moving from outdated systems to an agile, scalable, cloud-native core

How a composable foundation accelerates product launches, improves operational efficiency, and strengthens member relationships

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Learn how to break free from legacy cores and build a composable foundation that drives

innovation, deepens member loyalty, and fuels long-term growth.

Member expectations are changing quickly, with younger generations prioritizing seamless, personalized digital experiences over traditional in-branch service.

This playbook explores how adopting a composable, cloud-native core can unlock the agility, innovation, and scalability credit unions need to thrive in a fast-changing market.

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Core transformation

Hear from our experts

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“We needed a solution native to that environment which shared the lean and agile attributes of our business. Mambu offers us scalability, flexibility and speed to market at a fraction of the cost of traditional core systems.”

Co-Founder & CTO, New10

“We’ve seen a lot of changes in the industry, so this end-of-life warning was simply the latest. Replacing the core banking system gave us the chance to modernise to meet current needs and set ourselves and our customers up for the future.”

Chad Griffin, CEO, League Data

“With Mambu's composable API-first platform and extensive partner ecosystem, we aim to reach 200,000 new customers within five years and later deliver future-ready, sustainable financial solutions to our existing customers.”

Leandro Hermida Brañas, CIO of Ibercaja

“We needed a solution native to that environment which shared the lean and agile attributes of our business. Mambu offers us scalability, flexibility and speed to market at a fraction of the cost of traditional core systems.”

Co-Founder & CTO, New10

“We’ve seen a lot of changes in the industry, so this end-of-life warning was simply the latest. Replacing the core banking system gave us the chance to modernise to meet current needs and set ourselves and our customers up for the future.”

Chad Griffin, CEO, League Data

“With Mambu's composable API-first platform and extensive partner ecosystem, we aim to reach 200,000 new customers within five years and later deliver future-ready, sustainable financial solutions to our existing customers.”

Leandro Hermida Brañas, CIO of Ibercaja

“We needed a solution native to that environment which shared the lean and agile attributes of our business. Mambu offers us scalability, flexibility and speed to market at a fraction of the cost of traditional core systems.”

Co-Founder & CTO, New10

“We’ve seen a lot of changes in the industry, so this end-of-life warning was simply the latest. Replacing the core banking system gave us the chance to modernise to meet current needs and set ourselves and our customers up for the future.”

Chad Griffin, CEO, League Data

“With Mambu's composable API-first platform and extensive partner ecosystem, we aim to reach 200,000 new customers within five years and later deliver future-ready, sustainable financial solutions to our existing customers.”

Leandro Hermida Brañas, CIO of Ibercaja

Ready to get started?

Let’s compose the future of credit unions together.

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