Her late father, AKM Shamsuddin, a chemistry graduate from University of Dhaka, would take her to the Lalon akra in Kushtia where she watched musical performances.
They have collaborated on songs such as "Meri Pardesi Babu", "Srabone", "Koh Jaon" and "Sathe Robe Tumi".
[7] On 26 March 2015, her third single "Tomake Balobashe – O Amar Desh" was released in commemoration of 44 years of Bangladesh independence.
[9] In February 2015, Jahan and Kaasheff were interviewed on BBC World's Impact focusing on International Mother Language Day.
[11][12] In July of the same year, two songs "Tumake Balobashi – O Amar Desh" and "Jaavidan", co-recorded with Raja Kaasheff, were launched at the Houses of Parliament.
[13][14][15][16][17] In 2015, Jahan and Kaasheff worked on an original soundtrack for Habibul Islam's film Rathrir Jathri.