Here are some well-known companies and platforms that often offer remote job opportunities:

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1. Remote.co: Remote.co is a job board focused exclusively on remote work opportunities.

2. FlexJobs: FlexJobs is another job board specializing in remote and flexible job listings.

3. We Work Remotely: We Work Remotely is a job board with a variety of remote job listings, particularly in the tech and development sectors.

4. Stack Overflow: This platform is well-known for its remote-friendly job listings in the tech industry.

5. GitHub Jobs: GitHub also lists remote job opportunities, primarily in software development and related fields.

6. Automattic: The company behind WordPress, Automattic, is known for its fully remote workforce and often has job openings.

7. Zapier: Zapier offers automation tools and has a distributed team of remote workers.

8. Buffer: Buffer, a social media management platform, is also fully remote and often has job openings.

9. GitLab: GitLab is a web-based Git repository manager that has a remote-only workforce.

10. InVision: InVision is a digital product design platform that offers remote positions in various fields.

11. Toptal: Toptal is a marketplace for top talent, and it often has remote opportunities for freelancers and experts.

12. Remote OK: Remote OK is a job board dedicated to remote work listings across different industries.

13. Upwork: Upwork is a platform for freelancers and remote workers to find job opportunities in various fields.

14. AngelList: AngelList is a platform connecting startups with talent, and many startups offer remote roles.

15. Amazon: Amazon frequently hires remote workers for various positions, including customer service and tech roles.

16. Dell: Dell often has remote job openings in sales, support, and technology.

17. GitHub: GitHub offers remote job opportunities, particularly in software development.

18. Salesforce: Salesforce, a leading CRM company, offers remote work options in various roles.

19. HubSpot: HubSpot, a marketing and sales software company, has remote positions available.

20. Automotive Companies: Companies like Ford and General Motors have offered remote job opportunities in various departments.

21. Education Companies: Online education companies like VIPKid, Pearson, and edX often hire remote instructors and support staff.

22. Healthcare and Telemedicine: Telehealth companies like Teladoc and Amwell offer remote job opportunities for healthcare professionals.

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Please note that the availability of remote positions can change over time, so it's a good idea to regularly check the job boards and career pages of these companies for the latest opportunities. Additionally, specific job search engines and websites can help you find remote job listings in your field of interest.