Is it permissible to work for a company that provides salary advances to employees in exchange for a fixed daily amount, in addition to its primary activity in electronic wallets and payment services for companies?

We have not been able to ascertain the nature of the e-wallet's operations or the type of payment services offered by the company. However, generally speaking, if the company's core business activity is permissible, and your work is confined only to the permissible aspects of its activity, without directly engaging in usurious transactions, then it is permissible for you to work with them. As for salary advances, if the fees charged increase with the number of days the advance is held (e.g., ten Egyptian pounds for each day), then this is a usurious interest, because it is not against the actual cost of the service. However, if the fees are fixed (e.g., only ten Egyptian pounds), then it should be examined: if they are equivalent to the actual cost of the service, then it is permissible, but anything exceeding the cost is usurious interest. Fixed fees that are not tied to the loan amount or its duration, charged for the service, are permissible, while any increase beyond the actual services is forbidden.