Transforming credit unions across Atlantic Canada using Mambu on AWS
League Data moved from its legacy core banking system to Mambuβs cloud-based solution running on Amazon Web Services (AWS), migrating the majority of its operations and developing a protocol to cut over customers to the new core in just 48 hours.
- 0
- hour migration cutover time
- 0+
- credit unions migrated in one year
- 0+
- composable partner ecosystem
League Data
About the customer
League Data is a cooperative FinTech with a mission to help its customersβ 37 credit unions in Canadaβs 4 Atlantic provinces (Nova Scotia, New Brunswick, Newfoundland and Labrador and Prince Edward Island)βadapt to an evolving market through sustainable innovation, leadership, and support.
The company provides chief information officer (CIO) services to 37 member credit unions that operate a total of 130 branches providing financial services to 320,000 members.
Credit unions are a form of member-owned cooperative financial institution, usually operating locally or regionally, and provide day-to-day banking services to about 6 million Canadians. Because they are much smaller than Canadaβs national banks, credit unions face a challenge building the infrastructure needed to provide services comparable to the large banks.
League Data was established in 1975 as an aggregator of services, providing better buying power and giving the credit unions it serves a united voice and access to products and services they could not easily afford on their own. In turn, this increases buying power and gives the group a stronger voice.
βOver the last 50 years, weβve worked to meet the needs of credit unions and help them serve their communities.β
- Chad Griffin, CEO, League Data
The challenge
Aging software threatens operations
League Data received news that its core banking software, an outsourced legacy system running on mainframe hardware, was going to reach end of life in a few years. This had the potential to disrupt operations for the 37 credit unions that operate across Canadaβs 4 Atlantic provincesβNova Scotia, New Brunswick, Newfoundland and Labrador, and Prince Edward Islandβbecause League Data provided banking infrastructure to those credit unions using that legacy software.
League Data began evaluating solution providers. It was looking for a company that would fulfil core functions but would also enable League Data to customise features, because each of its credit union customers needed a system that fitted its specific product offerings. It was also important that the solution could be customised to meet Canadian financial regulations and evolve as new regulations and financial products and services became available.
βWeβve 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.β
- Chad Griffin, CEO, League Data
The solution
Mambu and League Data build a migration-friendly solution
League Data anticipated that the coming years would require more than a business-as-usual approach. It expected open bankingβthe requirement for financial services providers to support interoperability with FinTech startups and competing incumbentsβto come to Canada. It saw a need to collaborate with FinTechs, modernize payments, and keep up with credit union membersβ evolving expectations for a rich digital experience.
Mambu won League Dataβs attention because it matched the companyβs taste for innovation.
Mambuβs SaaS banking products are built on Amazon Web Services (AWS), which meant the move to a safe, secure cloud infrastructure was part of the overall modernization and migration for League Data. βIn addition to Mambuβs core banking, we needed to be able to integrate a range of tools and applications from more than 20 partners,β says Wendy Spears, digital banking program manager at League Data. βAWS has great flexibility, a ton of tools, and excellent support for APIs. Even getting certification for our new system was much easier because of the documentation, the robust security, and the privacy controls that come with AWS.β
League Data has been using Mulesoft, an API platform that Griffin considers core to the technology modernization. βIt has allowed us to create a more robust API catalog that gives us some ecosystem autonomy,β he says. βIf we want to deal with different partners, we have the ability. It connects to Mambu and runs on AWS, has a very reliable track record, and is scalable.β
Because Mambuβs core banking solution is API friendly, League Data has been able to incorporate products and services from AWS and other vendors and can also develop its own applications.
In addition to Mambu, key AWS services used include Amazon Relational Database Service (Amazon RDS), an easy-to-manage relational database service that means Mambu will be able to scale as the organization grows, and Amazon Elastic Compute Cloud (Amazon EC2), for resizable compute power. It also uses Amazon Managed Streaming for Apache Kafka (Amazon MSK) to manage Apache Kafka infrastructure and operations, making it easier for developers and DevOps managers to run Apache Kafka applications and Apache Kafka Connect connectors on AWS; and Amazon OpenSearch Service, which allows League Data to run search workloads simply without the hassle of configuring, managing, and scaling OpenSearch clusters.
βIt was a very forward thinking decision for a traditional banking institution, a credit union collective, to make. We could have played it safer-in-the-now with another legacy banking solution and taken a less future-oriented path... Mambu sees itself as a really lean banking core that is API led. That meant we could develop the specific tools we needed, such as support for our customersβ brick-and-mortar branches. We created AWS-hosted portlets that snap in seamlessly and get served up on the user interface side in Mambu.β
- Chad Griffin, CEO, League Data
The result
League Data chart for the future for credit unions
Less than 3 years after League Data received the end-of-life warning, it had implemented a new core banking system with Mambu and migrated the majority of its operations to the cloud. It also successfully migrated its first customer, Brunswick Credit Union, to the new platform.
In the following year, more than 35 credit unions were migrated to the new system. League Data works with the credit unions to help them prepare for migration and, after the preparation is complete, League Data can do the actual cutover to the new system in less than 48 hours with no disruption to services.
League Data is now positioned for future challenges and opportunities that will come to Canadaβs financial services industry, thanks to its collaboration with Mambu and AWS. The ecosystem they have built features components from more than 20 partners and supports 37 credit unions.
βSome folks talk about agility in their approach and their model. Weβve actually got it stem to stern. We can confidently say, βYeah, we know that we can do that.β Using Mambu and AWS, weβve built a flexible foundation for the future.β
- Chad Griffin, CEO, League Data
Future-proof your credit union
Learn more about how Mambu can support credit unions modernise with our cloud banking platform, purpose-built for agility, innovation and a changing market.
Explore more customer stories
Β© Mambu 2026