Being a happy customer of SBB, I must say that applying to a position there has been really disappointing.
The application process starts through their job portal. This is the first source of frustration, because the website doesn't work at all under Safari and in Firefox/Chrome is really difficult and unintuitive to use.
From that point on every communication happens through email. But this is a joke because, instead of writing the message directly on the email, they tell you to read a PDF that is attached.
If I have to take the issues above as a sign of how the company works at IT level, I'm glad they decided to withdraw my application.
The second thing that really bugged me is that they ask you to provide all kinds of paperwork to validate your education and previous employments. While I understand that this is customary in the DACH region, it's also irrelevant for applicants with 10+ years of experience. Moreover, in a country with such a high number of foreign high-skilled workforce is also impractical and unrealistic.