ANSWER:

If this is the only thing they do and the banks are conventional riba based, this is not permissible. 

Is it permissible to work for a company that builds software for investment banking clients?

Jobs | November 1, 2018 3:20 am
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I run an online gift shop. Every year, the platform where I’m selling sends out a newsletter to their customers where they advertise gifts for Mother’s day and Father’s day celebration. Am I allowed to have my products listed on that newsletter in order to increase my sales? Those who don’t advertise don’t get much exposure and end up selling little compared to the shops that do.
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My uncle is a taxi driver here in the UK. He takes people to their school, work, home and also to clubs and pubs where the his passengers drink alcohol and do other haram things but he only drops them off outside and carries on his work. He told me that he is to pay a monthly subscription for me to have some dietary food and drink. Is it halal for me to eat and drink this.