Project Description

Modernized a complex, undocumented legacy mainframe system through deep reverse engineering and Agile-driven execution.
Migrated workloads to a scalable, cloud-native architecture with APIs, microservices, and modern data platforms—ensuring zero disruption to operations.

Project Challenge 

• •   Legacy mainframe ecosystem with no documentation and requirements
• •   No clear system architecture, workflows, or data visibility
• •   Complex dependencies across COBOL, JCL batch jobs, IMS, DB2, Oracle, and ETL pipelines
• •   Need to modernize to the cloud without disrupting critical business operations

•   Legacy mainframe ecosystem with no documentation and requirements
•   No clear system architecture, workflows, or data visibility
•   Complex dependencies across COBOL, JCL batch jobs, IMS, DB2, Oracle, and ETL pipelines
•   Need to modernize to the cloud without disrupting critical business operations

Quadyster’s Approach Performed deep reverse engineering of legacy systems

• • Analyzed extensive COBOL programs, JCL batch jobs, IMS transactions, and DB2 stored procedures
• • Developed detailed pseudo-code and logical workflows to reconstruct business logic
• • Defined requirements iteratively using Agile SCRUM methodology
• • Established target architecture and phased migration strategy
• • Executed an incremental delivery model to reduce risk and ensure continuity

Project Solution

• • Converted legacy workloads into Java/Python-based APIs and microservices
• • Migrated Legacy & Oracle (Dealer, Customer, AOR) data to AWS Cloud
• • Transformed Informatica ETL into cloud-native pipelines
• • Built modern Data Warehouses & Data Marts across key business domains
• • Delivered UI/UX applications for improved accessibility

Results & Impact

• • Delivered full modernization on time and within budget
• • Reconstructed system knowledge through pseudo-code-driven reverse engineering
• • Enabled scalable, cloud-native, API-driven architecture
• • Improved performance, maintainability, and data accessibility
• • Achieved zero disruption to mission-critical operations

Value to the Client

• • Expertise in handling highly ambiguous, undocumented legacy environments
• • Strong capability in mainframe-to-cloud transformation
• • Proven ability to deliver cost-efficient, high-impact modernization solutions
• • Realized significant cost savings by:
• • Reducing dependency on expensive mainframe infrastructure
• • Optimizing ETL and batch processing workloads
• • Enabling efficient cloud resource utilization
• • Lowering long-term maintenance and operational overhead