If you need to, you can change your subdomain (e.g. yourcompany.homerun.co). Keep in mind that you should only change the domain if you really have to because changing URL's can become confusing to your visitors.
Changing your subdomain
Click your profile in the top left corner and click Settings
At the left, scroll down to Custom domain under Advanced
Type a different subdomain
Click Save changes
Would you like to set up a custom domain?
Read more about using a custom domain with your career page.