I am currently learning about a computer system that uses networks, but I do not have experience. I was told that this system is used in banks. Is it permissible for me to train in a bank that deals with interest (without any salary)? Shall I look for another place to train on such technical matters, knowing that it is difficult to find one, or it is alright to do so?.
It is not permissible to work in riba-based banks, with or without a salary, because the one who works in them will either be dealing directly with riba by recording or witnessing it, or he will be helping with it in some way. The riba-based banks are places of great evil in which a major sin is committed and there is no guarantee that the one who sits in such a place will not be subjected to the curse of Allaah of which He has warned those who engage in riba. There is also no guarantee that the one who trains in such a place will not be tempted by his self that is inclined towards evil to carry on working there because of the temptation he finds there.
Hence we say that it is not permissible to work or train in riba-based banks. You should look for another place that is free of sin, and you will find it in sha Allaah.
We ask Allaah to help and guide you.
And Allaah knows best.