Come work with us! We have several projects that the successful applicant may choose between, see add. If you have worked on energy system modelling in your PhD, definitely apply. (Sorry for a late posting, but if you mention Openmod in your application I will have an extra look.) We have people working with PyPSA in your group and welcome people interested in method development as well as more applied topics.
https://www.chalmers.se/en/about-chalmers/work-with-us/vacancies/