Bandhan Bank Ltd.'s Chief Financial Officer, Sunil Samdani, has resigned in order to explore professional opportunities outside the bank.Samdani, who was also a key managerial personnel of the lender, will serve his last working day on Sept. 30, Bandhan Bank said in an exchange filing.The bank is in the process of identifying a suitable candidate for the office of CFO and key managerial personnel, it said.