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There are very many job search boards for this, you can try certain section of the international ones or the specific regional websites.
Almost all of them provide a wide range of vacancies and also often have useful tips for job seekers in addition too.
You can try such popular boards as for example Getaflex, Jobsora nz.jobsora.com/jobs-student , Neuvoo, List Stuff Jobs, Smart Select and ApplyDirect.
But none of them provide a 100% protection from scam, you need to check the vacancies and certain companies separately.