Welcome Centre Appointments for EU Blue Card

Welcome centre in Hamburg does not have any appointments for EU Blue Card registration for several months. How can an employer wait for me for several months who is looking to hire someone now!

Any suggestions how to register? I have a job offer which is valid for 1 month only.

Apply for a normal work permit instead!

Indeed. If your employer insists to apply for EU blue card, they must be in a position to wait till you get the application processed. Else, apply for normal WP. If it is you who prefer to apply for EU blue card, discuss the turn around time with your employer.