Is it permissible to leave an unlawful job that allows for performing Friday Prayer but is unstable, for a lawful and stable job that might prevent performing Friday Prayer?

It is permissible to move from the first job to the second, provided that this is not due to missing the Friday prayer, because leaving the Friday prayer to stay at work is not permissible. If it is known that the new job prevents the performance of the Friday prayer, then one must remain in the first job, even if it is against the law, because the harm of violating the law is less than the harm of abandoning the Friday prayer.