What is the ruling on working for a company that deals with usurious transactions, knowing that my salary is not currently from the company, and given the scarcity of job opportunities in Algeria? And what is the ruling on my continued employment after my salary becomes from the company, and I will be directing customers to a usurious bank to complete the installment sale process?

There is no harm in your work of selling products to individuals or companies, and there is no harm in accepting checks from usurious banks, because you are not dealing directly with usury. Similarly, there is no harm in selling by installments with an increased price.

However, if you will ask the customer to open an interest-bearing account or enter into a forbidden contract to complete the transaction, this is impermissible and you must abandon it, unless you are compelled to do so.