I have to run integrations with things those sort of people designed. We get EDI streams and error codes straight from some COBOL thing from the 70s which has b

I have to run integrations with things those sort of people designed. We get EDI streams and error codes straight from some COBOL thing from the 70s which has been carefully ported through to whatever crap they're running today verbatim. Recently there was an issue where a field overflowed which broke literally everything. Then they added a zero to the start as part of the specification which broke it even more because half the companies on the planet were treating it as a string and not a number. If there's anything I've ever learned about working in the financial sector it is that the only thing that is protecting you is the legal framework around it, not the banks or financial companies which are universally a fucking shit show.