A top-10 U.S. bank was running critical payment and settlement processing on 40-year-old COBOL mainframes. Aging infrastructure, a shrinking COBOL talent pool, and the need to support real-time payment rails made modernization urgent.
400,000+ lines of undocumented COBOL with no surviving original developers.
Manual code analysis estimated at 3–4 years for a full rewrite.
Real-time payment requirements (FedNow, RTP) impossible to implement on the legacy stack.
Integration with 23 downstream systems required parallel operation during transition.
AidenAI deployed AiDAP's AI-powered modernization agents to autonomously analyze, document, translate, and validate the COBOL codebase into Java microservices, running in parallel with the live mainframe during the transition.
AiDAP Discovery Agent mapped all 400,000+ lines of COBOL, generating full business logic documentation.
Technology Displacement Agent translated COBOL to idiomatic Java Spring Boot microservices with 97% confidence scoring.
Parallel Testing Agent ran 1.2M automated regression tests, validating output parity with the mainframe.
Canary deployment enabled gradual traffic migration with instant rollback capability.
New real-time payment capabilities (FedNow, RTP) added post-migration in 6 additional weeks.
50%
Reduction in total migration cost vs. manual rewrite
6 mo.
Time to full production cutover
97%
Automated test coverage with confidence scoring
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