ANSWER:

This is not halal, unless you can reject doing the work for these haram companies.

I work in an IT company providing network assistance to various major companies. Basically we help them troubleshoot any issues in their network and bring it back up. Certain customers of my company are Banks and alcohol companies and I get cases from them about their networks as well. Can you please tell me if this is halal for me to continue

Jobs | May 14, 2018 6:03 am
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I have a friend who works for …. bank. She has some ‘gay’ colleagues working with her. Often she tells me, “Gays are the safest male ( or whatever)on earth, you’ll expect no harm from them. And this is what makes me comfortable in my office zone.” I feel it too disturbing because gays r absolutely haram in our religion and sometimes I try to explain her. Please give me advice.
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Is it permissible for a muslim to work for a bank? (interest based(HSBC,JPNC..etc)