Putting your resume on job boards for 3rd party recruiters (at least in India). Not sure how it is in EU/US.
For recruiters within a company, try looking for them on LinkedIn, check out a recent post of theirs to verify if they still work for the company, and reach out with an application if they have an email address, or via LinkedIn messages.
When I search for companies in India, all I get are 3rd party recruitment firms. The recruiters themselves are hopeless and ask questions like "How many years of Git experience do you have?".
How do you find promising companies in the first place?
For recruiters within a company, try looking for them on LinkedIn, check out a recent post of theirs to verify if they still work for the company, and reach out with an application if they have an email address, or via LinkedIn messages.