Building Provable Equivalence: COBOL-to-Java Migration Without Risk

Mainframe modernization touches billions of dollars in daily financial transactions, yet risk remains the primary barrier to migration. This proof-of-concept demonstrates how organizations can now validate complete semantic equivalence between legacy COBOL systems and modern Java implementations using real mainframe emulation on AWS—effectively eliminating migration uncertainty without disrupting production systems. For enterprises managing decades-old batch processing systems, this approach transforms a notoriously dangerous modernization challenge into a provably safe transition path.