This paper describes the object oriented C++ programming on the development of thermo-electric multiphysics topology optimization. In this present work the two physics models are strongly coupled. The joule heating generated from electrical model is taken as volumetric heat generation in thermal model and the electrical conductivity is linearly dependent on temperature. Objects have been created for the finite element analysis of multiphysics. The density-based topology optimization method has been used for topology optimization and program has been developed for the nonlinear optimization by following nonlinear optimization algorithm.