Mehdi Hasan Khan (Bengali: মেহেদী হাসান খান) is a Bangladeshi physician and software developer.^[1][2] He is known for inventing free and open source Bengali keyboard Avro in 2003.^{[1][3][4][5][6][7]}

Khan was born in Dhaka on July 23, 1986.^[2] After completing his secondary from Ideal School and College and higher secondary from Notre Dame College, Khan obtained his MBBS degree from Mymensingh Medical College in 2010.^[2][8]

Khan started developing Avro for Windows in 2003 when he was a first year student of Mymensingh Medical College. It was first published on web for free download on March 26, 2003, under Creative Commons Attribution-NoDerivs 3.0 Unported License.^[2][9] Initially, it was developed in Visual Basic, which was later rewritten in Delphi. After discussion,^[10] OmicronLab published the source code of windows version under MPL 1.1 license with the Avro Keyboard 5.0.5 public beta 1. Avro was further developed by M. M. Rifat-Un-Nabi, Tanbin Islam Siyam, Ryan Kamal, Shabab Mustafa and Nipon Haque from OmicronLab.^{[2][11][12][13]}

After developing avro keyboard as a side project, he fully involved his career as a backend software developer. Dr. Hasan have also worked in mPower Social Enterprises, Eniacs, Okdoit, HungryNaki, Backpack Technologies and ShopUp.^[14] During 2020 he shifted to Berlin as a Senior Backend Engineer of MoBerries. He is currently working as a Software Development Engineer at Contentful based in Berlin.