Building Robust Digital Banking Solutions with Microservices

In Dutch, there’s a saying: “de eerste pannenkoek mislukt altijd” or “the first pancake is always spoiled.” This proverb is apt for building digital engagement (mobile and web channels) for banking using modern microservices architecture. Creating a successful microservices architecture is a complex undertaking, often fraught with challenges that can lead to failure on the first attempt. Here are key reasons why most microservices architecture implementations struggle initially:

Microservices architecture breaks down applications into smaller, independently deployable services, which increases operational complexity. Organisations often underestimate this complexity, particularly regarding network communication, data consistency, and service discovery.

Microservices require a specific team structure and culture, often described as “you build it, you run it.” Teams must be cross-functional, autonomous, and have end-to-end responsibility for their services. Failure to adapt to this new organizational structure can lead to bottlenecks and inefficiencies.

Determining the right size and scope of a microservice is critical. A common mistake is creating services that are too large (mini-monoliths) or too small (nanoservices), leading to maintainability, performance, and scalability issues.

Successful microservices architecture demands robust DevOps practices and automation. Continuous integration, continuous delivery (CI/CD), and automated testing are essential. Without these, the deployment and management of services become cumbersome and error-prone.

Observability is crucial in a microservices architecture to monitor, identify, and resolve issues. Many implementations fail because they lack proper logging, monitoring, and tracing mechanisms across services.

Microservices require a certain level of expertise in areas like domain-driven design, containerisation, and cloud-native technologies. Inexperienced teams may struggle with these concepts, leading to poor architectural decisions.

While focusing on functional aspects, non-functional requirements like scalability, resilience, and maintainability are often neglected. This oversight can lead to systems that meet business functionality but fail under real-world conditions. Neglecting these requirements is a ticking bomb. Services might look ready on the surface, but under production workloads, the entire architecture can fall apart, exposing the organisation to high security and reputation risks. Implementing these non-functionals as an afterthought is often impossible, leading to a complete revamp of the architecture sooner than expected.

We call this aspect production readiness. Our production readiness checklist includes nearly 100 different controls that are implemented and tested simultaneously with the functionality itself. This removes the risk of delayed and multiple re-implementation efforts.

Contact us if you want learn more about leveraging our Digital Success Fabric platform to launch your digital channels right from the first try, reducing up to 80% of costs and efforts while having the flexibility to build your own non-compromise UI and differentiating capabilities.