Celero Communications, Inc. is seeking a Principal Optical Systems Engineer to lead the verification and integration of advanced coherent optical DSP solutions. You will define system specifications, drive test strategies, and guide cross-domain debugging across DSP, optics, and hardware for 1.6T and beyond. The role requires deep expertise in communication theory, DSP algorithms, and optical systems, with a track record of leadership in validating coherent DSP products such as 400ZR and 800ZR.