Click on the gear in the top right corner. Then click "Account Settings".
Click the "Edit Profile" button.
Enter in the website you wish to embed your career's site i.e. http://interviewnow.io
Click on the "Career Site" link from the menu (left navigation).
The career site can be placed into an iframe by embedding your career's site URL onto any page of your choice under the chosen domain.
Alternatively, share the career's site URL or link to the career's site URL directly.