Sr. Principal Application Engineer

The role

You will serve as the technical owner for customer integration and deployment of coherent DSP-based optical modules and systems. You will work with hyperscalers, network equipment manufacturers, and strategic partners to support system design, platform integration, and qualification testing.

What you will do

• Serve as the technical owner for customer integration and deployment of coherent DSP-based optical modules and systems.
• Work with hyperscalers, network equipment manufacturers, and strategic partners on system design, platform integration, and qualification testing.
• Configure, tune, and optimize coherent DSP parameters.
• Troubleshoot complex issues in DSP algorithms, signal processing, optical impairments, and host electrical interfaces.
• Analyze system performance metrics and drive issues to root cause.
• Support interoperability testing in multi-vendor environments.
• Partner with DSP, ASIC, hardware, firmware, and systems engineering teams.
• Contribute to technical documentation, application notes, and validation reports.
• Provide feedback to engineering and product teams on feature prioritization and roadmap decisions.

Required qualifications

• Bachelor's, Master's, or PhD in Electrical Engineering, Communications Engineering, Optical Engineering, Applied Physics, or Related technical discipline
• 8+ years of experience
• 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
• Hands-on experience with Forward Error Correction (FEC) and framers
• Hands-on experience with 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

Nice to have

• 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.

About the company

Celero is a startup working on coherent DSP technology for AI infrastructure and optical networking.