Is it forbidden to work for a company owned by an interest-based bank, which operates in the field of financial leasing by registering the ownership of the leased item in the company's name until all installments are paid, and by taking a price for the item that is greater than what it was purchased for?

If the company is independent of a Riba-based bank, invests its funds according to Islamic Sharia (definition), and operates under the supervision of a Sharia supervisory board, then working for it is permissible. If the company purchases cars, takes possession of them, and then sells them in installments for more than their cash price, there is no objection to this, provided that the ownership of the sold item is transferred to the buyer immediately, and the seller does not retain ownership. To guarantee its rights, the company may stipulate a mortgage on the sold item or other assets, or a formal mortgage on the sold item along with the transfer of its ownership to the buyer.