Have I committed a sin by leaving my job to reunite my family, with no alternative available?

Fulfilling the rights of your wife and the resulting benefits, as well as avoiding harm, takes precedence over holding onto a job opportunity that only provides you with a mere livelihood. You have been blessed with a newborn daughter whom you haven't seen, and two years have passed since your marriage, which is a long period of absence.

Ibn Qudamah said: Imam Ahmad was asked: How long can a man be absent from his wife? He replied: Six months; a letter should be sent to him, and if he refuses to return, the judge shall separate them. It is stated in Al-Insaf by Al-Mardawi that if a husband travels away from his wife for more than six months and she requests his return, it is incumbent upon him to do so unless there is an excuse. Imam Ahmad's statement implies that it is something indispensable for him, and this applies to both religious obligations and seeking provision which he needs. Ahmad was asked about a man who was absent from his wife for more than six months, to which he replied: If he is on Hajj, or engaged in warfare, or earning a living for his dependents, I hope there is no harm in it, provided he has left her with sufficient sustenance and a male mahram to suffice her. And even if you do not incur sin by this absence due to seeking earning and livelihood, you must consider your wife's needs. So, if you explain the situation to your wife and she does not patiently endure and asks you to return, then return, and seek Allah's help in seeking your provision in your own country.