بسم الله الرحمن الرحيم
(Fatwa: 710/834/SN=09/1437)
As per the detail of your task which you have written (that you do not have to talk to the customers regarding interest nor you have to advise about it), your job is lawful as per the Shariah, you can continue it.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband
