Pangian specializes in remote jobs at leading, reputable companies. They have a database of 400,000+ jobs in over 150 countries. You can filter the jobs by cateogry, country / location and keywords. Some jobs are only accessible at the Pro tier that costs $14.99/month or $99 annually.

Remotive is a pay-to-play remote job board. It boasts over 30,000 jobs at the time of writing. Membership costs €79.00 for lifetime access. Some jobs are publicly available so you can get some use of it even without paying for the membership.