Case Study: Persistent achieves 40% faster application understanding and de-risks legacy modernization with CAST Imaging (CAST)

Persistent de-risks modernization of newly acquired legacy application for a U.S. Financial Services Firm

The client, a leading U.S. provider of recordkeeping, third‑party administration, and government savings services, acquired a retirement services firm and needed to unify and integrate a business‑critical monolithic application—hundreds of thousands of lines of legacy Visual Basic with a SQL Server backend. Given the complexity and urgency, Persistent Systems was engaged to develop a comprehensive multi‑year modernization roadmap to de‑risk the integration.

Persistent executed a 24‑week, end‑to‑end discovery and documentation engagement, using CAST Imaging and a customized community extension to automatically reverse‑engineer and map technical dependencies, then plan stabilization and a move to ReactJS with micro front‑ends. The work reduced effort to understand and document the application by 40%, increased client confidence, drove broader adoption of CAST Imaging, and established a clearer, lower‑risk path for long‑term modernization.

Persistent

Manish Sharma

Engineering Partner