In the Physics Department of the University of Cologne, the laboratory of Prof. Yoichi Ando works in the field of topological matter and is trying to realize topological quantum computing. To address this goal, three key elements -- materials synthesis, nanodevice fabrication, and ultra-low-temperature measurements --- are synergistically performed in the same lab. Multiple Postdoc and PhD positions are available within the newly-granted Cluster of Excellence “ML4Q” (Matter and Light for Quantum Computing) as well as the ERC Advanced Grant “MajoranaTopIn”.