He works in marketing of a program to deal in shares

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Check below answers in case you are looking for other related questions:
Making a program which will be used for halaal and haraam
Ruling on selling clothes when one does not know whether they will be used in halaal ways or haraam

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Related Answers:
He works in a company in which there is a restaurant that sells alcohol and pork
Developing Computer Programs for Banks based on Interest
He brings his customers to sinful places and receives a commission for that from their owners
Making a program which will be used for halaal and haraam
Ruling on selling clothes when one does not know whether they will be used in halaal ways or haraam

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