Software lawyer sounds like you're a lawyer with a specialization. But ultimately I think it shouldn't come down to the specifics of what you call yourself since that's something people can weasel out of, but rather if you're communicating that you provide professional legal services.

I identify as a Software Engineer. My pronouns are gcc/py.

Feel free to just drop the "software" part, since it's a mouthful, and just call yourself a "lawyer." What's the difference anyway, we're all just typing words and numbers into computers at the end of the day.

Programmers write the code, though. A better name might be "software legislator." Given that lots of us work on top of a giant, partially-understood heap of frameworks and libraries, that might actually be a more appropriate name than Software Engineer.