Ibnul Tahsin Rihan (ইবনুল তাহসিন রিহান), known online as tahsinX / TahsinX (Ibnul, Tahsin, Rihan / ইবনুল, তাহসিন, রিহান), is a Frontend Developer at Fazesoft and Computer Science & Engineering (CSE) student at United International University (UIU) in Dhaka, Bangladesh.