Is it permissible to work at night, which necessitates sleeping from after Dhuhr prayer until after Isha prayer?

Whoever observes the five daily prayers, perfecting their ablution, performing them on time, and completing their bowing and prostration with humility, has a covenant with Allah that He will forgive him and admit him into Paradise. But whoever does not do so has no covenant with Allah; if He wills, He may forgive him, and if He wills, He may punish him. It is obligatory to adopt the means that aid in preserving them on time, and the first thing a servant will be held accountable for on the Day of Resurrection is his prayer.