The Department of Physics at Stockholm University invites applications for a postdoctoral researcher in the Trapped Ion Quantum Technology Group. The position is part of the ERC Synergy project “OPEN-2QS” developing a 2D quantum simulator using trapped Rydberg ions for open-system quantum dynamics. Responsibilities include experimental design, cryogenic setup, Rydberg excitation, high-precision measurements, data analysis, collaboration with international teams, and supervision of students. The project focuses on quantum simulations of novel states of matter, molecular dynamics, and quantum thermodynamics, combining experimental expertise with close interaction with theory groups in Mainz and Tübingen.