About the RoleWe are seeking a Principal Optical Systems Engineer to join our newly established optical system verification team at Celero Inc. The successful candidate will help lead system integration and validation of advanced coherent optical DSP solutions. Key areas of focus include defining system specifications, delivering test strategies for DSP and optical integration, supporting firmware solutions to resolve integration challenges in pluggable modules, and driving cross-domain debugging and optimization across DSP, optics, and hardware. You will also help shape architecture and next-generation product direction (1.6 T and beyond).This role requires deep expertise in communication theory, DSP algorithms, and optical systems, combined with robust leadership in defining validation methodologies and resolving complex cross-functional issues.Key ResponsibilitiesPartner with the DSP systems group to translate high-level system requirements into DSP performance targets for equalization, clock recovery, and laser frequency and phase recoveryEstablish link budgets based on DSP specifications to set performance targets for optical components and work with module partners to optimize link marginLead development of high-fidelity system models that correlate with ROSNR and module receiver sensitivity measurementsLead resolution of critical system-level issues spanning DSP algorithms, analog front-end calibrations,



and optical impairmentsDevelop structured debug frameworks to isolate multi-domain problemsWork with module partners to define system-level test frameworks and adopt qualification test plans from tier-1 customers to expedite module deploymentOversee bring-up of new DSP ASIC EVBs and coherent optical modulesRequired QualificationsMaster's or Ph D in Electrical Engineering, Optical Communications, Photonics, or related field, or equivalent experience10+ years of experience in coherent optical systems or high-speed communication systemsProven track record of leading system verification of coherent optical DSP products (e.G., 400 ZR, 800 ZR, coherent-lite).Hands-on experience working with:Optical communication hardware and components - EVBs and pluggable modulesHigh-speed optical and electrical test/measurement equipment, such as OSA, RTO, DCA, and AWGExtensive understanding of DSP and FEC for coherent optical communication systems, including experience with QPSK, 16 QAM, and 64 QAM.Programming experience in Python, MATLAB, and/or CPreferred QualificationsFamiliarity with OIF implementation agreements (400 ZR, 800 ZR), Open ZR+, and the CMIS management interface for pluggable modulesExperience with advanced coherent techniques, such as probabilistic constellation shaping and soft-decision FEC (e.G., o FEC)Knowledge of coherent optical components (tunable lasers, modulators, ICRs, silicon photonics or In P) and how their impairments affect DSP performance, such as laser phase noise, PDL, PMD, and fiber nonlinearityFamiliarity with OTDR-based fiber link characterizationExperience building automated test frameworks in Python, including instrument controlExperience working directly with hyperscale or tier-1 network operator customersPublications or patents in optical communications or DSP#J-18808-Ljbffr

📌 Principal Optical Systems Engineer (Quebec City)
🏢 CELERO COMMUNICATIONS
📍 Quebec City