She worked at IBM from 1989 until 2006, and became a distinguished engineer at IBM before moving to Google.
In 2006, she founded the Google Haifa Engineering Center in Haifa, Israel, where one of her key projects involved autocompletion for Google and YouTube queries.
During 2009-2017 she worked in Yahoo research in Israel.
From August 2017 she joined Amazon's Alexa Shopping Research.
Maarek has served as program committee co-chair for WWW 2009, WSDM 2012 and SIGIR 2012.
She is also a member of the Board of Governors of the Technion.
In 2013, Maarek was elected as a Fellow of the Association for Computing Machinery "for contributions to industrial leadership and to information retrieval and web search."