What is the ruling on working as a data analyst for a company that analyzes users' monthly expenses, deposits the saved amount into their personal accounts, and grants them a fixed monthly profit, knowing that the company's source of profit is investing the saved funds, and that the company does not deal with loans or benefit from usury?

If the investment method in a company involves guaranteeing a fixed profit for the capital owner and guaranteeing the capital itself, then this method is Islamically prohibited by scholarly consensus. This is because profit must be a percentage of the actual realized profits, not a fixed sum or a percentage of the capital, and losses are borne by the capital.

The reality of this transaction is that it is a loan with excessive interest (riba). Working for such a company is not permissible except in cases of extreme necessity, such as the absence of any other permissible source for essential expenses, due to the assistance it provides in sin.

Working in mixed companies is permissible if the company's core activity is permissible, but the product must not be designated for something forbidden, and the employee must not directly engage in forbidden work themselves. However, if the company's core activity is forbidden, such as usurious banks and commercial insurance companies, then working for them is absolutely prohibited.