Private sector / nonprofit jobs

There are sites that aggregate job listings specifically for companies that help Democrat / progressive / left campaigns. IIRC a lot of them (at least ones with technical job openings) basically do data science.

https://careercenter.gainpower.org/

https://arena.run/progressive-employers

https://jobfeed.progressivepipeline.org/

https://www.grassrootsanalytics.com/jobs-board

https://www.mattlockshin.com/job-board

https://www.socialjusticeleadership.org/job-board has links to many other online job boards, including most of the above, plus several more.