Career option allows you to apply for a Job or An Internship, It refers to the employment section in which you can submit your CV and post for a Job and wait to get hired in the following company.
Now talking about how to reach to the career page? So to locate yourself to Career page you have to go to the official MindStick page i.e., https://www.mindstick.com in the front menu you will see a Career button beside Pricing which will take you to the Career page of MindStick.