Scalable Core Banking System

The Challenge

A major regional bank was relying on a 15-year-old monolithic mainframe system. Scaling for new digital features was impossible, downtime was frequent during deployment, and maintenance costs were skyrocketing. They needed a modern architecture that could support real-time payments and open banking APIs without compromising security.

The Solution

We executed a phased "strangler pattern" migration, replacing the monolith with a suite of independent, containerized microservices built on Java Spring Boot. The frontend was modernized with React to provide a seamless customer experience.

• Event-Driven Architecture

  Implemented Apache Kafka for asynchronous communication between services, ensuring high throughput and resilience even if one service experiences load spikes.

• Bank-Grade Security

  Integrated OAuth2/OpenID Connect for secure authentication and mutual TLS (mTLS) for all service-to-service communication.

• Observability & Monitoring

  Deployed a comprehensive ELK (Elasticsearch, Logstash, Kibana) stack and Prometheus/Grafana monitoring to gain real-time visibility into system health.

System Architecture

A distributed microservices architecture powered by event sourcing for uncompromising reliability and scalability.