Google has been encouraging job boards to add structured data to job postings: https://developers.google.com/search/docs/advanced/structured-data/job-posting ht

Google has been encouraging job boards to add structured data to job postings: https://developers.google.com/search/docs/advanced/structured-data/job-posting https://developers.google.com/search/docs/advanced/structure.... LinkedIn is presumably using this data to pull the postings in.