Praise be to Allaah.
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.