There are several ways to find professionals who develop for a company in a foreign country:

Freelance platforms: Websites like Upwork, Freelancer, and Fiverr offer access to a large pool of freelance developers from all over the world. You can browse through their profiles, check their ratings and reviews, and contact them directly.

Job boards: There are several job boards that specialize in remote work opportunities, such as Remote.co, We Work Remotely, and FlexJobs. You can post a job listing, and qualified candidates will apply.

LinkedIn: LinkedIn is a professional networking site where you can find developers who have experience working for companies in foreign countries. You can use LinkedIn's search function to find developers who meet your requirements, and then reach out to them directly.

Referrals: Ask your existing network if they know any developers who have experience working for companies in foreign countries. Referrals can be a great way to find qualified candidates who have already been vetted by someone you trust.

Outsourcing agencies: There are outsourcing agencies that specialize in connecting companies with developers in foreign countries. These agencies can help you find developers who meet your requirements and manage the entire outsourcing process for you.

Regardless of the method you choose, be sure to thoroughly vet the developers you are considering to ensure they have the skills and experience necessary to meet your needs.