Not too bad but expect a long one which they don't tell you. If they don't like you they tell you they'll contact you but if they like you they tell you to stay after the test for more interviews

Select a position you would like to apply for online and email them your resume and answer 5 basic questions. They respond back informing you of the process and ask for availability to take an aptitude test. You select 2-3 times that work for you. They respond with the test time, directions, and other pre-reqs you need to complete before going in to take the test. The test is extremely difficult and not designed to be finished. They do give you sample problems before. After the hour long test, if someone is available (lots of people take the test at one time), an HR recruiter will sit down with you and its a standard interview process from then on. If the interview goes well, they will have the next higher up come in and interview you, if they are available.