What is the ruling on working for a company whose concept is based on financial calculations for companies, and among its clients are usurious banks and insurance companies, with the agreement not to perform any work specific to these forbidden entities? And what is the ruling on owning shares in this company under the "Stock Options" system, which are not listed on the stock exchange, and which allows benefiting from the price difference of the share when it rises, with the possibility of gradually selling the shares or holding onto them upon leaving employment?

It is not permissible for a company to sell its software to those who use it for sinful purposes, such as usurious banks and commercial insurance companies, due to the element of cooperation in sin.

As for the work of a programmer, it is permissible to work for the company if the product is not specifically designated for a prohibited matter, the employee does not directly engage in the prohibited work himself, and the majority of beneficiaries of the work are not entities that use it for illicit purposes.

Mixed shares, in which lawful and unlawful funds are commingled, are not permissible to trade, and the unlawful portion must be disposed of. It is also not permissible to accept them as wages, because a condition for wages is that they must be permissible.