Eliminating Vendor Lock-In with Cloud-Native Application Modernization

Client

A leading secondary mortgage company

Our client is a leading secondary mortgage company operating in the United States. The organization manages high-volume, mission-critical loan operations that demand accuracy, compliance, and reliability at scale. To stay competitive, it set a clear enterprise direction: eliminate vendor lock-in and modernize toward a cloud-native architecture, guided by a broader microservices modernization strategy.

Challenge

A costly, high-risk platform that clashed with the enterprise cloud-native strategy

The organization ran a mission-critical, Tier-0, external-facing application for Post Fund Loan Data Correction on Appian. The platform had served its purpose, but over time it became a strategic liability across several dimensions:

• Compliance risk: The Tier-0 SLA required 30-day remediation for vulnerabilities. Appian’s quarterly release cycle could not meet that window, which created ongoing compliance exposure.
• Licensing cost: Platform licensing reached $1.2M annually, at $100K per month, on top of $3M in specialized Appian developer costs.
• Vendor lock-in: The application depended on 4 dedicated Appian experts, and 22 environments required specialized platform support and patching.
• Strategic misalignment: The proprietary platform pulled against the organization’s cloud-native, microservices modernization strategy.

Solution

A complete rewrite on proven, cloud-native technologies aligned with enterprise strategy

Rather than continue with incremental fixes, the organization committed to a full rewrite on modern, proven technologies that matched its enterprise strategy. Hexaware delivered the rewrite as a fixed-price engagement in 30 weeks, with full onsite delivery that ensured close collaboration and thorough knowledge transfer. This low-code platform migration to an open-source, cloud-native stack gave the organization full ownership of its technology roadmap.

Technology stack

• Frontend: Angular micro-frontend architecture for a modular, scalable UI.
• Backend: Java with Spring Boot and Spring JPA for business logic and data access.
• Infrastructure: AWS EKS (Kubernetes) with compute-optimized c6g.16xlarge instances across Production, UAT, SIT, and Development.
• Database: Migration from DB2/UDB on a VM to a cloud-native relational database.

Benefits

Immediate savings, stronger compliance, and an architecture built for growth

The rewrite delivered a 50% Year 1 cost reduction, projected cumulative savings above $10M over 5 years, and eliminated $1.2M in annual licensing. For enterprises exploring cloud cost reduction strategies, this engagement shows how a full rewrite can reduce licensing costs while strengthening compliance and scalability.

Operational efficiency

• AWS compute costs of roughly $250K annually replaced platform licensing.
• 10 microservices now run across 2 regions and 4 environments.
• The application portfolio is far simpler, down from 77 SAIL UI objects, 170 CDTs, and 72 process workflows to streamlined, maintainable code.
• Independent vulnerability patching keeps the application compliance-ready and aligned to the 30-day SLA.

Strategic benefits

• An open-source stack (Java, Spring, Angular, Kubernetes) removed vendor lock-in.
• The technology now aligns with the enterprise cloud-native modernization strategy.
• Specialized talent moved off platform-specific work, and developers now focus on market-facing innovation.
• A scalable architecture stands ready for future growth and new features.

Technical transformation at a glance

Summary

Proof that cloud-native modernization delivers measurable value over proprietary platforms

What began as a technology simplification effort became a strategic win: a modernized application, no vendor lock-in, and a savings trajectory above $10M. The new architecture is compliance-ready, free of vendor-driven SLA conflicts, and fully aligned with the enterprise cloud-native direction. Freed from platform-specific maintenance, skilled developers now spend their time on core product innovation.

For organizations weighing whether to stay on a proprietary platform or invest in cloud-native transformation, this case study offers clear proof that application modernization delivers measurable business value alongside technical strength.

Ready to move beyond proprietary platforms? Discover how our cloud-native application modernization services eliminate vendor lock-in and reduce cost. Explore our solutions today.