Signal Integrity Engineer

InfoStride; San Francisco (CA); On-site; USD 130,000 - 190,000; Full time

Job summary

Lightmatter is seeking a Signal Integrity engineer to drive next-generation products from concept to development. You will join the Signal Integrity, Power Integrity and Packaging teams, shaping package and system architecture and analysis through lab bring-up to meet signal integrity requirements.

You will work on high-speed interfaces (PCIe, SerDes, UCIe), perform SI analyses, and collaborate with hardware designers to ensure proper impedance matching and routing.

Qualifications

• Bachelor’s degree in Electrical Engineering (or relevant field) with 5+ years of related experience; or 3 years with a Master’s; or a PhD with no experience.
• Robust professional and specialized knowledge in signal integrity analysis for high-speed interfaces.
• Proficiency in using simulation and analysis tools for signal integrity, including Ansys.
• Strong understanding of transmission line theory, impedance matching, and equalization techniques.
• Knowledge of signaling protocols for high-speed interfaces (SerDes, UCIE, etc.).
• Ensure robust signal integrity and timing for lower-speed interfaces (system clocks, SPI, I2C).
• Experience with PCB design and layout considerations for high-speed interfaces.
• Proficiency in using lab equipment for signal measurement and characterization.
• Ability to work independently with sound judgment; work reviewed at critical checkpoints.

Responsibilities

• Plan and execute moderate to complex signal integrity tasks for high-speed interfaces such as PCIe, UCIe and SerDes.
• Perform SI analysis and simulations (eye diagrams, jitter, equalization) and adapt practices to evaluate design choices.
• Collaborate with hardware designers and PCB layout engineers on projects affecting engineering functions.
• Assist in impedance matching, termination, and routing techniques; advise peers on SI matters.
• Perform detailed SI measurements and characterization using lab equipment; troubleshoot issues.
• Participate in signal integrity design reviews; present findings and suggest innovations.
• Document SI analysis results and guidelines for stakeholders with adaptable communication.

Skills

Signal integrity analysis

High-speed interfaces

Transmission line theory

Impedance matching

Equalization

Independent work

Cross-functional collaboration

Education

Bachelors in Electrical Engineering

Master’s degree

PhD

Tools

Ansys

Oscilloscope

Vector network analyzer

Job description

Lightmatter is looking for a Signal Integrity engineer to drive the next generation products from

concept to development. You will be part of the Signal Integrity, Power Integrity and Packaging

team, tasked with influencing the package and system architecture, design, and analysis

through lab bring-up to meet the product's signal integrity requirements. This position offers a

unique opportunity to solve complex interactions across digital, analog and photonics domains

while meeting stringent signal integrity goals.

Responsibilities

• Plan and execute moderate to complex signal integrity engineering tasks for high-speed interfaces such as PCIe, UCIe and SerDes. return loss, and crosstalk to evaluate and optimize signal quality.
• Perform signal integrity analysis and simulations (eye diagram analysis, jitter analysis, equalization) by adapting existing practices and procedures to evaluate design choices.
• Collaborate with cross-functional teams including hardware designers and PCB layout engineers working on individual and team projects that impact the broader engineering function.
• Assist hardware designers in ensuring proper impedance matching, termination, and routing techniques, advising peers on complex signal integrity matters.
• Perform detailed signal integrity measurements and characterization using lab performance and troubleshoot ill-defined issues.
• Participate in signal integrity design reviews, presenting findings and suggesting creative variations in approach to ensure adherence to design specifications.
• Document and communicate signal integrity analysis results and design guidelines to stakeholders, adapting communication style depending on the audience.

Qualifications

• Bachelor’s degree in Electrical Engineering or relevant field with a minimum of 5 years of related experience; OR 3 years of experience and a Master’s degree; OR a PhD without experience.
• Robust professional and specialized knowledge in signal integrity analysis for high-speed interfaces.
• Proficiency in using simulation and analysis tools for signal integrity, including Ansys
• Strong understanding of transmission line theory, impedance matching, and equalization techniques.
• Knowledge of signaling protocols for high-speed interfaces, including SerDes, UCIE, etc.
• Ensure robust signal integrity and timing performance for lower-speed critical interfaces and control buses, such as system clocks, SPI, and I2C.
• Experience with PCB design and layout considerations for high-speed interfaces (layer stack-up, routing, and via design).
• Proficiency in using lab equipment for signal measurement and characterization.
• Ability to work independently, utilizing best judgment to select appropriate courses of action, with work reviewed at critical checkpoints.

Preferred Qualifications

• Strong problem-solving and debugging skills for signal integrity-related issues.
• Understanding of CMOS process technologies and their impact on signal integrity.
• Demonstrated ability to network with new stakeholders and collaborate effectively across