Answered by Ustadh Salman Younas
Question: I am a digital marketing professional working for an agency who has recently won a bank as a client. Is it permissible to perform updates and setting strategy with the aim of helping the bank drive more website traffic?
Answer: assalamu alaykum
This would be permitted although it may be best to avoid given banks and interest.
The reason this would be permitted is because your actual work i.e. technical updates and website strategy, is not impermissible. If you are actually designing technical components, it cannot be ones that are exclusively used for usurious transactions.
Similarly, the website strategy would be permitted if it relates generally to a banks webpage as opposed to exclusively an interest-based service.
For more, please see: Is It Considered Assisting in Sin to Develop Software for Casinos, Banks, or Insurance Companies?
Checked & Approved by Shaykh Faraz Rabbani