Principal Engineer — High-Speed Optical Transceivers

Lead the architecture and design of next-generation optical transceivers, from concept through volume manufacturing.

About Infraeo

Infraeo Inc. is a global AI cluster connectivity company developing and licensing cutting-edge connectivity technologies and products. Our solutions help customers ship optical transceivers and cable assemblies with superior cost and performance, enabling 400G, 800G, and 1.6T AI cluster networking.

We provide engineering design, IP licensing, field engineering services, and logistics solutions to accelerate the deployment of AI infrastructure worldwide. With a global team across the US and Asia, we serve customers around the world.

About the role

We are seeking a Principal Engineer – High-Speed Optical Transceivers to lead the architecture, design, and development of next-generation high-speed optical transceiver products. This role requires deep expertise in optical communications and advanced modulation technologies, and will serve as a technical authority guiding products from concept through volume manufacturing.

Key responsibilities

• Lead system architecture and end-to-end design of high-speed optical transceivers (e.g., 100G / 400G / 800G / 1.6T).
• Define and own optical, electrical, mechanical, thermal, and firmware requirements.
• Drive technology selection including lasers, modulators, drivers, TIAs, DSPs, photodiodes, optics, and packaging.
• Analyze and optimize PAM4 and coherent optical links, including link budgets and performance margins.
• Oversee design verification, validation, and qualification testing.
• Troubleshoot complex issues related to signal integrity, BER, jitter, optical performance, and reliability.
• Partner with ASIC/DSP, firmware, hardware, manufacturing, and quality teams.
• Lead supplier technical reviews and manage component/vendor technical engagement.
• Support manufacturing ramp, yield improvement, and cost optimization.
• Interface with customers on technical requirements, failure analysis, and field issues.
• Ensure compliance with industry standards (IEEE 802.3, OIF, relevant MSAs, Telcordia).
• Mentor senior and junior engineers and provide technical leadership across the organization.

Required

• Master’s or PhD in Optical Engineering, Electrical Engineering, Physics, or a related field.
• 10+ years of hands-on experience in high-speed optical transceiver design and development.
• Deep expertise in high-speed SerDes and signal integrity.
• Deep expertise in PAM4 and/or coherent modulation.
• Deep expertise in optical module packaging and thermal design.
• Deep expertise in optical and electrical characterization methods.
• Proven ability to lead complex, cross-functional technical programs.
• Strong analytical, troubleshooting, and communication skills.

Preferred

• Experience with QSFP-DD, OSFP, CFP2-DCO, or similar form factors.
• Knowledge of DFM/DFA, reliability testing, and qualification standards.
• Experience supporting hyperscale data center or telecom customers.
• Prior role as Principal Engineer, Architect, or Technical Lead.
• Flexibility to support teams in multiple time zones preferred.
• Mandarin language proficiency preferred but not required.

Infraeo Inc. is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or protected veteran status.