[drobilla]

Engineers generally already have such things.

I don't think "programmer" is a well-defined enough concept to be associated with an oath. You can't go around calling yourself a Medical Doctor or an Engineer if you aren't, but pretty much anybody who codes at all can reasonably call themselves a programmer.

Even with all that aside, such oaths only really work for things like causing blatant harm. Unqualified "freedom" and "liberty" (especially in the USA) are so nebulous they mean almost nothing at all. The overwhelming majority of programmers work for organisations whose goals (e.g. profit, power) are not - and are often directly opposed to - "freedom" by any reasonable definition.

In short, I don't think the answer to your question is "no, there shouldn't" so much as "no, there couldn't".