All perfect praise be to Allah, The Lord of the worlds. I testify that there is none worthy of worship except Allah and that Muhammad, sallallahu ‘alayhi wa sallam, is His slave and Messenger.
We commend you and your husband for making Hijrah to a Muslim country in order to settle therein. Verily, this helps the Muslim preserve his religion and worship his Lord without hardship. May Allah reward you generously.
The fact that your husband has not found a job and that your savings are decreasing is undoubtedly a kind of trial, which you should endure with patience. Verily, patience yields great rewards and pleasant outcomes. Please refer to fatwa 83577 about the virtues of patience.
Covering the woman's face is obligatory according to the preponderant view of the scholars. So you have to abide by that, especially given that you follow the scholarly view that says that it is obligatory to cover your face. If you face hardship and your husband has no money to provide for you, then there is no harm in taking off your niqaab if it is the only means to find a job. Scholars underlined that the Muslim is given a concession to follow the less stringent scholarly view available in order to ward off hardship.
The Shaafi‘i scholar As-Subki wrote, "It is permissible for the lay-Muslim to follow the view of scholars and avail himself of the legal concessions (choosing the less stringent view of scholars) at times of dire need, but without making it a habit to follow all concessions. It is correct in this respect to say that the difference of opinion among scholars is a source of mercy, since concessions are a source of mercy (for people)."
It is impermissible to go beyond the need. This means that you are allowed to take off the niqaab at work but must still wear it elsewhere because the need is to be answered proportionately.
Allah knows best.