Signal Integrity Engineer (Boston and Mountain View)

Signal Integrity Engineer

Lightmatter builds chips that enable extreme-scale artificial intelligence computing clusters. If you're a collaborative engineer or scientist who has a passion for innovation, solving challenging technical problems and doing impactful work like building the world's first optical computers, consider joining the team at Lightmatter!

Lightmatter is looking for a Signal Integrity engineer to drive the next generation products from concept to development. You will be part of a cross-functional systems and packaging team consisting of silicon, package, and systems engineers, tasked with driving the package and system architecture definition from concept through design optimization and completion to meet the product’s signal and power integrity requirements. This position offers a unique opportunity to innovate new package and system architectures by solving complex interaction across digital, analog and photonics domains while meeting stringent signal integrity goals. 

Responsibilities

• Develop and implement signal integrity strategies for high-speed interfaces such as PCIe and SerDes.
• Perform signal integrity analysis and simulations to evaluate and optimize design choices, including eye diagram analysis, jitter analysis, and equalization techniques.
• Collaborate with cross-functional teams, including hardware designers, PCB layout engineers, and system architects, to provide signal integrity guidance and support throughout the product development lifecycle.
• Work closely with hardware designers to ensure proper impedance matching, termination, and routing techniques for high-speed SerDes interfaces, considering design constraints and manufacturability.
• Perform detailed signal integrity measurements and characterization using lab equipment, such as oscilloscopes, network analyzers, TDRs, and VNA, to validate design performance and troubleshoot issues.
• Participate in signal integrity design reviews, providing technical expertise and recommendations to ensure optimal signal integrity performance and adherence to design specifications.
• Analyze and mitigate electromagnetic interference (EMI) and electromagnetic compatibility (EMC) challenges associated with SERDES interfaces, ensuring compliance with industry standards and regulations.
• Document and communicate signal integrity analysis results, design guidelines, and recommendations to stakeholders.

Requirements

• Bachelor’s degree in Electrical Engineering or relevant field.
• Minimum 8 years of relevant industry experience in signal integrity analysis for high speed interfaces (112G SerDes, PCIe Gen5).
• Proficiency in using simulation and analysis tools for signal integrity, including Ansys HFSS & Keysight ADS.
• Strong understanding of transmission line theory, impedance matching, and equalization techniques.
• Knowledge of signaling protocols for high speed interfaces including PCIe and SerDES.

• Experience with PCB design and layout considerations for high-speed interfaces, including layer stack-up, routing, and via design.
• Familiarity with electromagnetic compatibility (EMC) and electromagnetic interference (EMI) mitigation techniques.
• Proficiency in using lab equipment for signal measurement and characterization, such as oscilloscopes, network analyzers, TDRs, and VNA.
• Knowledge of industry-standard simulation models and methodologies for SERDES analysis, such as IBIS-AMI.
• Ability to write scripts to automate the simulation flow (python, javascripts, ocean scripts or skill).

Preferred Qualifications

• Strong problem-solving and debugging skills for signal integrity-related issues, including eye diagram analysis, jitter analysis, and equalization techniques.
• Experience with DDR and HBM integration.
• Understanding of CMOS process technologies and their impact on signal integrity.
• Demonstrated excellent communication skills and ability to collaborate effectively in cross-functional teams.
• Ability to work independently and tackle projects with minimal supervision.

Benefits

• Comprehensive Health Care Plan (Medical, Dental & Vision)
• 401k matching
• Life Insurance (Basic, Voluntary & AD&D)
• Generous Time Off (Vacation, Sick & Public Holidays)
• Paid Family Leave
• Short Term & Long Term Disability
• Training & Development
• Flexible, hybrid workplace model
• Stock Option Plan

We offer competitive compensation. The base salary range for this role, inclusive of all US locations will be from $175,000 to $210,000 determined based on location, experience, educational background, and market data.

Lightmatter recruits, employs, trains, compensates and promotes regardless of race, religion, color, national origin, sex, disability, age, veteran status, and other protected status as required by applicable law.