Internet of Things (IoT) is not just a word now. With an estimated 30 billion devices in the world by 2020, IoT has already become what it was envisioned when the trend began. But there is still a hustle from companies around the world for better and better user experience because the technology keeps getting upgraded and need for upgrade never stops for the user. Researchers and scientists are trying every day to improve the experience by improving the involved things and by improving the communication means, ”the internet”. One such means of communication expected to grow in the future is satellite communication for IoT. Satellite to be used for this purpose needs to be low-cost, robust, reliable, and future ready. An improvement in satellite architecture is imminent. For making satellite feature rich and robust but still low-cost means increase in mission-life of a satellite. Like human life, this can be achieved by better medical system for the satellites. With introduction of a doctor on board, the thesis aims to propose solution for improved mission-life and features for the satellite. The doctor on board in this case is called Supervisor system. This system will need to have a robust and modular software on its designated hardware. Software can be designed and developed to be robust using a standard software architecture that is promising while complementing the requirements. The thesis focuses on designing software architecture for this ”Supervisor system”. By the end of this thesis, the author designs a software architecture for the said system after study of similar architectures. The software architecture is used to develop important features of the mission and is tested for its portability and modularity. Future needs and changes to the existing system are also foreseen and discussed in the end.