Is it permissible to work at an Islamic (real estate) bank and receive a salary from the returns that the bank obtains through Islamic transactions, especially given the need for money for marriage expenses?

If the real estate bank is an Islamic bank and adheres to Sharia rulings, as certified by trustworthy individuals, then there is no objection to working there and taking the profits resulting from its legitimate transactions. However, merely contracting with a usurious bank to work there is impermissible, as it involves entering into a forbidden lease contract and acknowledging usury.