First of all, I applied through the UBS website. I had an answer from HR about one week later asking me to pass two online tests (logical and numerical) which I did right away. Logical test was pretty easy, had to train a bit for the numerical one but isn't that hard.
Then no news for 2 weeks so I called the HR and they told me I did good for the tests and that I would get a call with HR soon.
HR called me the next week and asked a bit about what I wanted to do. He told me that I would be contacted by the line manager for a phone interview.
I had the phone interview about a week later with the Line manager. Wasn't hard. Just regular presentations of my education and professionnal background and a few questions: Which experience was the most interesting for you ? What is an IT typical lifecycle ? etc.