Legacy offline codebases from big, often public or fintech institutions, are often written in arcane / archaic languages like Cobol or Fortran or even more low

Legacy offline codebases from big, often public or fintech institutions, are often written in arcane / archaic languages like Cobol or Fortran or even more low level and urgently need to be managed, refactored or modernised properly, without surrendering safety and security.