I found Samsung very good. My direct experience was as an English-speaking foreigner doing compilers and JITs etc in their Moscow R&D office mid 2014-early 2018

I found Samsung very good. My direct experience was as an English-speaking foreigner doing compilers and JITs etc in their Moscow R&D office mid 2014-early 2018, and visiting colleagues working on the same project in San Jose. You had to be around the office 45 hours a week (first entry to last exit each day, so that includes breaks), but they were serious about people taking weekends off, and their legally-entitled vacation (28 days, plus about 10 statutory holidays, plus about 8 days from New Year to Orthodox Christmas). If your manager asked you to work in the weekend then you got double or triple time. Unfortunately the location is undesirable at the moment.