A method, system, and computer program product for improving software component placement on software execution platforms are provided in the illustrative embodiments. A computer determines whether a code corresponding to the software component includes business process logic. The computer determines a granularity level of the code. The granularity level of the code is a categorization of the code according to whether a number of external references in the code exceed a threshold value. The computer, responsive to determining the granularity level of the code, recommends placement of a first portion of the code on a first platform in the set of software execution platforms.