Optical SerDes Validation Engineer at Celestial AI

Santa Clara, California, United States

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Not SpecifiedCompensation

Senior (5 to 8 years)Experience Level

Full TimeJob Type

UnknownVisa

Photonics, Semiconductors, AI HardwareIndustries

Requirements

Bachelor’s degree in Electrical Engineering, Computer Engineering, or related field with 5+ years of relevant experience; Master’s or Ph.D. with 3+ years of experience preferred
Solid background in analog/mixed-signal circuit behavior and system-level validation practices
Extensive hands-on experience handling lab instruments such as oscilloscopes

Responsibilities

Lead validation and electrical/optical characterization of high-speed SerDes IPs, including ethernet, PCIe and custom optical PHYs, using industry-standard lab instrumentation (oscilloscopes, BERTs, VNAs, spectrum analyzers, etc.)
Design, develop, and maintain both hardware and software test infrastructure for lab-based performance verification and compliance testing
Develop reference designs and test platforms to ensure consistent, repeatable evaluation of SerDes interfaces under real-world conditions
Define and execute validation plans aligned with internal specifications and industry standards (e.g., PCIe, Ethernet, CEI)
Collaborate closely with analog, digital, DSP, and system architecture teams to debug functional issues, improve performance, and validate feature implementations
Implement automated test flows and advanced data analysis tools using scripting languages (Python preferred) to improve efficiency and accuracy
Provide documentation and technical reports on test methodologies, validation results, and failure analysis
Support cross-functional teams such as production test, reliability, and applications engineering in addressing customer and manufacturing-related concerns

Skills

Key technologies and capabilities for this role

Optical SerDesSilicon ValidationMixed-Signal ValidationHigh-Speed InterfacesAnalog CharacterizationSerDes ValidationPhotonic Interconnects

Questions & Answers

Common questions about this position

What are the main responsibilities of the Optical SerDes Validation Engineer?

The role involves leading validation and electrical/optical characterization of high-speed SerDes IPs including ethernet, PCIe, and custom optical PHYs; designing and maintaining hardware/software test infrastructure; and developing reference designs and test platforms for consistent evaluation.

What skills and experience are required for this position?

Candidates need passion for high-speed interfaces, deep expertise in analog and mixed-signal behavior, hands-on experience with lab instrumentation like oscilloscopes, BERTs, VNAs, and spectrum analyzers, and skills in validation planning, hardware/software test development, and cross-functional collaboration.

Is this a remote position or does it require on-site work?

This information is not specified in the job description.

What is the salary or compensation for this role?

This information is not specified in the job description.

What makes a strong candidate for this Optical SerDes Validation Engineer role?

A strong candidate has a passion for high-speed interfaces, enjoys deep dives into analog and mixed-signal behavior, brings hands-on lab experience with industry-standard tools, and excels in cross-functional collaboration and creative problem-solving to influence next-generation SerDes development.

Celestial AI

Optical interconnects for high-performance computing

About Celestial AI

Celestial AI focuses on high-performance computing for hyperscale data centers with its technology called Photonic Fabric™, an optical compute interconnect. This technology reduces DRAM requirements by up to 35% and lowers power consumption while increasing bandwidth capacity, which is essential for multi-tenant cloud environments. Additionally, it allows for the disaggregation of High Bandwidth Memory (HBM) using optics instead of traditional connections. The goal is to provide optical connectivity that supports advancements in Generative AI and complex workloads.

Sunnyvale, CaliforniaHeadquarters

2020Year Founded

$329.6MTotal Funding

SERIES_CCompany Stage

Data & Analytics, Hardware, AI & Machine LearningIndustries

51-200Employees

Benefits

Health Insurance

Vision Insurance

Dental Insurance

Life Insurance

Company Equity

Risks

Emerging competition from companies like Lightmatter and Ayar Labs.

Potential integration challenges with existing data center infrastructure.

Dependency on limited suppliers for photonic components poses supply chain risks.

Differentiation

Celestial AI's Photonic Fabric™ offers unique optical compute interconnect technology.

The company reduces DRAM requirements by up to 35%, saving billions annually.

Celestial AI enables disaggregation of HBM over optics, enhancing bandwidth capacity.

Upsides

Acquisition of Rockley Photonics' IP strengthens Celestial AI's competitive position.

$175 million Series C funding supports further innovation and market expansion.

Growing demand for energy-efficient solutions aligns with Celestial AI's sustainable focus.

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