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Reverse Engineering of MuleSoft Integration
A Banking, Financial Services & Insurance (BFSI) customer had critical MuleSoft APIs in production—but no source code or documentation. Facing high risk and maintenance challenges, they enlisted Yell Technologies to reverse engineer and modernize their integration ecosystem.
How Yell Technologies reconstructed production APIs, established documentation, and deployed environments on CloudHub 2.0 for a BFSI client.
Challenges
- No codebase, no documentation: Existing APIs ran in production, but without any traceable source or design docs.
- Support risk: Lack of visibility hindered troubleshooting, scaling, and compliance.
- Environment gaps: Only production existed—development and testing processes couldn’t proceed safely.
- Legacy deployment model: APIs ran on outdated CloudHub infrastructure, lacking scalability and best-practice isolation.
Solution
Yell Technologies applied a structured API-led restoration methodology leveraging MuleSoft’s CloudHub 2.0:
- Reverse-Engineering & Documentation • Analysed production flows and payloads to reconstruct source code. • Developed comprehensive design docs covering integration architecture and API contracts.
- API Re-Development • Refactored APIs in Anypoint Studio using best practices from recovered designs. • Ensured consistency with rebuilt documentation and API definitions.
- CloudHub 2.0 Private Space Deployment • Configured a secure CloudHub 2.0 private space (containerized, isolated environment) • Migrated modernized APIs into CloudHub 2.0, benefiting from built-in scalability, security, and infra-as-code support .
- UAT Environment Setup • Created a dedicated UAT environment with full parity to production. • Enabled safe validation cycles and phased rollouts before going live.
Why Yell Technologies’s Approach Worked
- Visibility and control: Complete design documentation ensures any team can understand, maintain, or enhance the integration landscape.
- API-led modularity: Standardized code and design artifacts allow for future reuse and consistent governance.
- Cloud-native upgrade: CloudHub 2.0 private spaces leverage containerized pods, granular vCores, and isolated ingress—ensuring secure, scalable deployments
- Robust testing pipeline: A dedicated UAT environment facilitates safe validation of changes before production deployment.
Results
- Reconstructed codebase & documentation: Full code and design assets for all APIs—secured and traceable.
- UAT environment introduced: Enabled controlled release cycles and reduced production risk.
- CloudHub 2.0 deployment: Leveraged secure, containerized infrastructure with auto scaling, load balancing, and isolation.
- Future-ready foundation: Built on MuleSoft best practices, simplifying future integrations and enhancements.
Conclusion
Yell Technologies successfully resurrected lost API assets for the BFSI client—delivering reconstructed code, documented integration architecture, and modern CloudHub 2.0 environments. This transformed opaque, production-only APIs into transparent, maintainable, and scalable services.