DO NOT DO THIS
You are interviewing at a bank. They SHOULD know better than to ask you for this information.
What is possible, but highly unlikely, is they are trying to gauge how much information security training they should give you. If you cave in (they will put some pressure on you) and you'll be flagging yourself as needing extra training.
Don't be caught in the game where you ask for reasons. There is NO REASON why they need both sides of your bank card. So don't even invite them to say things that are not true and attempt to confuse you.
Here are some examples of common BS reasons given:
- It's company policy
- Everybody is required to
- We can't pay you without it
- It's required by government regulations
- You can trust us, we are a bank
- We just need some information from it
- We need to verify your identity
- (Anything else that is said)
Regarding the card, there is often not just a CVV number, but there can be other security measures on that card, that you leak by trying to be clever, taking a screenshot, and blurring things out. For instance, on my Visa card, there is an additional code that some merchants use to verify the card is in my possession. So DON'T SEND A PICTURE OF THE CARD, even with blurring.
Because you are in Austria, simply send them either your IBAN, or your bank name, branch name, and account number. If they need more than that, contact YOUR bank, and ask for their advice.