hello from another person in tech! i've always gravitated toward companies that do work for nonprofits. i've been at my current job for almost six years, and the only reason they've been able to keep me is that (most of) the clients aren't soul-sucking. we do a lot of work for nonprofits who have causes i believe in, and that helps out a bunch. it's also a small, family run business (two guys who met in college about 15-20 years ago and grew the business from there). i've worked at less nonprofit-focused places, and i always felt drained.
i would find out which companies are doing your kind of work for the nonprofits you care about and go from there.