u/Lakouti

Question

Hi all, I am non-portuguese EU citizen who got a job offer in Portugal
HR asks me to get the following documents before signing a contract:
NIF, IBAN, NISS, CRUE

I get how I can obtain the first two before having a contract (even if I have to pay a fee to anchorless or the like); but for the NISS and CRUE isn't it backwards ?? Am I not supposed to have a contract before applying for a NISS ?

If anyone here got through the whole process and was kind enough to enlighten me I would be most thankful

Peace