What we do
We take a codebase in COBOL, RPG, VB6, Delphi, ColdFusion, PHP, Java or Oracle PL/SQL and return the same behavior in Go, Rust or TypeScript on PostgreSQL. It moves over module by module, with tests written against how the original actually behaves. Every language, every database and every size is in scope. The map of the system comes with the work, and for code this old it is usually the only accurate one anybody has.