What is the ruling on working for an information technology company that connects billers with banks to facilitate bill payments for a fee, and is it permissible to provide temporary technical consultation to it?

The electronic money transfer service from beneficiaries' accounts to billers' accounts is permissible because it is an agency for a fee. It is stipulated that the service fee be a fixed amount, and it does not matter if it is a percentage of the invoice value. It is also stipulated that the service should not be used to transfer illicit funds, such as usurious interest. If the company's activity is permissible, then working for it is permissible.