Sr. Principal Application Engineer

• Troubleshoot complex issues spanning multiple disciplines, including:
• DSP algorithms and signal processing
• Optical impairments, including chromatic dispersion (CD) and differential group delay (DGD)
• Host electrical interfaces, including 200G/400G/800G PAM4 and beyond
• Module management and control interfaces, including CMIS and telemetry
• Analyze system performance metrics, including BER, Q-factor, SNR, and debug logs, and drive issues to root cause.
• Support interoperability testing in multi-vendor environments.

• Partner closely with DSP, ASIC, hardware, firmware, and systems engineering teams to resolve issues and improve product performance.
• Contribute to technical documentation, application notes, validation reports, and customer-facing materials.
• Provide direct feedback to engineering and product teams on feature prioritization, product requirements, and roadmap decisions.

• Bachelor's, Master's, or PhD in:
• Electrical Engineering
• Communications Engineering
• Optical Engineering
• Applied Physics
• Related technical discipline
• 8+ years of experience" and "ability to travel up to 25–40% to customer sites as needed
• Strong fundamentals in digital signal processing, telecommunications theory, and optical communications.
• Hands-on experience with:
• Coherent modulation techniques, including QPSK and 16-QAM
• Forward Error Correction (FEC) and framers
• DWDM optical systems and coherent transceivers
• Experience debugging complex hardware and software interactions in a laboratory environment.
• Ability to independently solve ambiguous, cross-functional technical problems.
• Ability to generate technical documentation, such as Applications notes, Data sheets, Product requirement Documents, etc.
• Excellent communication skills and the ability to work directly with customers and internal engineering teams.

• Experience supporting coherent optical module products, including:
• 400ZR
• 800ZR
• Coherent Lite
• Familiarity with QSFP-DD and OSFP coherent modules.
• Knowledge of high-speed host electrical interfaces, including CEI-112G, PAM4, and next-generation standards.
• Experience using Python, MATLAB, or similar tools for analysis, automation, and data processing.
• Experience working with hyperscalers, network equipment manufacturers (NEMs), or cloud infrastructure providers.
• Exposure to open networking environments and multi-vendor interoperability testing.

• You are comfortable working in ambiguous environments and can make progress without perfect specifications.
• You take ownership and drive issues to resolution from initial discovery through deployment.
• You communicate complex technical concepts clearly to customers, partners, and internal stakeholders.
• You enjoy learning quickly and contributing beyond a narrowly defined role.
• You are excited to help shape not only a product, but also a company and its culture.

Celero?

• Work on cutting-edge coherent DSP technology powering next-generation AI infrastructure and optical networking.
• Make a direct impact on product direction and customer success.
• Collaborate with a small, highly experienced engineering team.
• Gain exposure across DSP, optics, ASICs, firmware, systems, and customer applications.
• Grow your career quickly in a dynamic startup environment with significant opportunities for leadership and ownership.

$175,000 - $225,000 Base Annually The final offer will be determined based on job-related skills, experience, qualifications, and location.