For LinkedIn search your desired job title in the search bar. Click on the jobs tab filter for jobs posted in the last 24hrs and filter for remote jobs. I would avoid applying for jobs that have over 100 applicants. This has worked for me recently and I've been able to get interviews without any outreach. Also apollo.io is good for email outreach. You can set up a multi touch email sequence. I find it better to send a custom email first then if you don't get a response in 24 hours put them on a 3 email sequence.