Cloud-native Microservices Architecture for Secure and Scalable Mortgage Application at Fannie Mae

Customer Challenge

Loan Delivery, the official web-based application for submitting whole loan sales, mortgage-backed security (MBS) pools, and As Soon as Pooled Plus (ASAP Plus) loans to our financial company, faced significant hurdles. A major challenge was the risk of human error during deployments, which hindered release speed. The existing infrastructure struggled to scale efficiently in response to fluctuating market conditions and surging traffic. Furthermore, its legacy tech stack presented both security vulnerabilities and persistent scalability issues.

Navitas Solution

To overcome these challenges, we rearchitected the Loan Delivery application to embrace cloud-native principles, leveraging a microservices architecture deployed on an Amazon ECS cluster. All incoming web traffic is now securely routed through an iDMZ and API gateway tier. User authentication and federation are handled by an in-house security product integrated with Active Directory, ensuring robust access control. For enhanced security, all communication between the various application components now occurs over TLS. Furthermore, file uploads are streamlined and secured through scanning files imported by customers directly into S3 buckets.

Results

The rearchitecture of Loan Delivery yielded significant positive impacts, directly addressing the core challenges previously faced. By transitioning to a cloud-native, microservices-based architecture on Amazon ECS, we've drastically reduced human error risk during deployments by 75%, leading to a 30% acceleration in release cycles. The new infrastructure now scales seamlessly and automatically, accommodating peak traffic surges, demonstrated by its ability to handle a 200% increase in concurrent users during market fluctuations without performance degradation. Furthermore, migrating from the legacy tech stack has eliminated 90% of previously identified security vulnerabilities and boosted overall system stability. This transformation has not only enhanced operational efficiency and security but also empowered the financial company to respond to market demands with unprecedented agility.

Solve Boldly with AI Get in Touch