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Customer Story

Modernizing Core Banking Technology Infrastructure

Helping a leading provider of technology solutions geared toward the banking industry improve backend services and unclog slow downstreams.

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Software Technology



The client provides digital transaction and marketing tools for financial institutions and operates to help financial institutions bring a seamless experience to their users. The company's flagship product is a scalable banking platform that provides banks and credit unions with a modern digital banking experience, along with websites and marketing tools. 

Monolithic systems were compromising performance and growth.
Develop and implement architectural changes, migrations, and tech stack research and recommendations.
Decommission the monolith, transitioning to a purely micro services-oriented architecture.

Monolithic Systems Challenged by Significant Growth

Over the last few years, the client has faced significant growth in its client base and the services it needs to provide. It was becoming a real challenge for some of its monolithic systems to deal with millions of transactions and slow downstream services. Communication between their microservices ran almost exclusively through HTTP, which means providing a more asynchronous character was a burden and compromised performance. Interactions between banks and credit unions are carried out through protocols that provide data on demand, so reacting to events proved to be challenging. That's when the client reached out to Xebia. 

Xebia was our first choice for qualified Scala engineers. We have since expanded to Mobile and Kotlin and the quality of talent is rock solid. Since our partnership started over 6 years ago, Xebia has delivered best-fit candidates over and over again. Year after year, Xebia continues to provide long-term developers that learn our stack quickly and understand our way of working.
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The Client Sr. Software Engineering Manager

The Need for Architectural Changes

After an initial review of the client's list of challenges, the Xebia team worked in tandem with the existing client team on developing and implementing a series of architectural changes, migrations, and tech stack research and recommendations. 

Upgrading and Splitting Monolithic Systems

The Xebia team designed and implemented several strategies to decommission the monolith, transitioning to a purely micro services-oriented architecture, and providing the proper level of isolation, scaling capabilities, and resilience. The new architecture allowed us to use different inter-service communication protocols like sync HTTP, RPC, or async AMQP protocols, depending on the specific challenge or problem. Additionally, those changes include creating back-pressure to prevent underlying services from exhausting and implementing isolation bulkheads and timeout mechanisms to deal with slow downstream services and to avoid system degradation. 

In addition, while focusing on critical systems development, several solutions were proposed that could be exported to other areas, serving as the standard for the rest of the organization for microservices development, including documentation and best practices.

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