What is the ruling on working in programming and maintaining a software program for a factoring company that specializes in debt management, and relies on it for all its operations?

"Developing programs for debt accounts is permissible, unless the debts stem from unlawful sources, such as usury (riba). In such a case, it would fall under the category of writing down prohibited usury, and cooperating in sin and aggression. If the programs are free from prohibitions, then there is no objection to them or to their maintenance."