Probably not the one you're thinking of, but I wrote something like this for C# ...

to11mtm on Jan 31, 2022 | parent | context | favorite | on: Devious SQL: Message Queuing Using Native PostgreS...

Probably not the one you're thinking of, but I wrote something like this for C# once upon a time called OddJob [0]. If nothing else it shows decent patterns for a job queue that is friendly towards multiple producers/consumers.

[0] - https://github.com/to11mtm/oddjob/tree/cleaning-aug-19