Sleiman cofounded Cartlow with Mohammed Sleiman. The mobile app provides customers with a simple way to buy clearance, open-box, and refurbished stock. In June 2022, Cartlow raised an $18 million series A round, led by Saudi investment firm the Alsulaiman Group, raising its total funding to $23 million. In May 2023, It partnered with Ecity Electronics, a multi-brand electronics retail group, to launch a sustainable device subscription program across 16 stores in the U.A.E. Before cofounding Cartlow , Sleiman worked as a media production quality controller at almentor.net.