Hey there, slightly biased because I went to SLO, but I’d recommend SLO if you’re interested in working in tech after college.
I legit had never heard of poly before applying to colleges. Realistically, if I had gotten in to LA/Berkeley I would have picked those in a heartbeat because I was a name whore in high school. I turned down every other same level UC(SD, Davis, Irvine, SB) because the math works out that I’d make the same out of CP, but pay more at a UC. CP, however, gets every major tech company and is more practical (except compared to UCB) so better for industry (i.e. like the 80 labs on campus). The UCs are much better for getting into grad school because of research opportunities but have literally 2 lab classes they experience throughout college; fairly evident when I was at the west coast regionals for the engineering competition at their lack of practical engineering - except against UCB.
CP has a 9X% job placement rate after college, but that’s hugely biased by the STEM departments.
I answer a lot of other questions as well in this thread if you want to get an in-depth view of someone’s time at CP
http://talk.collegeconfidential.com/cal-poly-san-luis-obispo/1974105-cpslo-graduating-senior-here-to-answer-any-questions-p1.html