California is home to many healthcare and medical device companies, making it a great location for medical sales representatives. Here are some popular job search websites where you can look for medical sales representative jobs in California:

1. Indeed.com
2. Glassdoor.com
3. Monster.com
4. ZipRecruiter.com
5. CareerBuilder.com
6. SimplyHired.com

You can search for medical sales representative jobs in California on these websites by entering your location and other relevant search criteria. You can also check with specific medical device and pharmaceutical companies, such as Johnson & Johnson, Pfizer, and Amgen, to see if they have any job openings.

In addition, there are several industry organizations, such as the Healthcare Distribution Alliance (HDA) and the National Association of Medical Sales Representatives (NAMSR), that offer job boards and networking opportunities. Joining these organizations can help you stay up-to-date on industry news and job openings.