In Thailand, JobsDB seems to be the best jobs portal, at least for jobs posted in English. The website also has jobs in Thai language though I don’t know if there is another better platform for jobs in Thai.
Jobs posted are for all levels and for all kinds of companies, from SMEs to multinationals. There are jobs for foreigners and jobs listings usually indicate when they are intended for Thais only.
However, salaries are not often disclosed, but the website has a system for candidates to detail their desired salaries in their application.