Is it permissible to work as a telemarketer for a forex brokerage company that deals in margin and without interest, knowing that the company makes an accounting entry as an alternative to hand-tohand قبض (qabd)?

A banking entry is considered a valid form of قبض (possession/seizure) if the money is deposited directly into the client's account or via a bank transfer. A delay in the entry for customary periods is permissible. The ruling on working in the stock market depends on the transactions being free from Sharia (definition) prohibitions. If they are free from Riba (usury) and loans that generate benefit, then there is no harm in working in it.