What is the relationship between Hotmail and Microsoft in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

He had worked for Microsoft (NasdaqGS: MSFT - news ) for over 20 years, specialising in more recent years in the sale and marketing of online products MSN Messenger, Hotmail and Bing.

Answer: developer