If you're looking for work, having some presence on LinkedIn is table stakes. Even if you're not networking, recruiters use the Premium features to do super granular searches to find candidates with specific skillsets for clients. Am on the hiring side of this now -- no LI presence, no chance of even making it into the filter.
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Using LinkedIn to find a job is like wearing a high-tech invisibility cloak made of professional connections - it works wonders if you know how to work it!
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BodySherpa
If you can code a little you can also build your own job agent: https://jobdatafeeds.com/blog/post/the-developers-guide-to-automating-remote-job-alerts