Why Reliability Demands Functional Programming

Re:Why Reliability Demands Functional Programming by rastrian on Saturday December 27, 2025 @11:52PM (#46408571)

I’ve worked in Brazilian banking stacks that were literally FTP + spreadsheets for years. So yes, the ecosystem is often messy and protocols can be flaky.

That’s exactly why I argue for stronger internal modeling: when the boundary is dirty, explicit state machines/ADTs + exhaustiveness + idempotency/reconciliation help ensure bad feeds don’t silently create invalid internal states.

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Re:Why Reliability Demands Functional Programming by whateveracct on Sunday December 28, 2025 @03:06AM (#46409344)

I totally agree as a fellow fintech engineer. It was a battle getting approval for all that from Product for us. While we were battling for it, we rushed multiple projects without literally any of it. And then spent a year+ each time cleaning up the mess.

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Re:Why Reliability Demands Functional Programming by brabel on Sunday December 28, 2025 @01:54PM (#46413437)

And your pockets were being filled in that year while you were just doing cleanups. Mission accomplished.

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