{"schemaVersion":"jobsearcher.job.v1","id":"608ae04d7ffb950ddfb5dfe4","url":"https://jobsearcher.com/jobs/608ae04d7ffb950ddfb5dfe4","canonicalUrl":"https://jobsearcher.com/jobs/608ae04d7ffb950ddfb5dfe4","title":"Signal Integrity Engineer","description":"Lightmatter is leading the revolution in AI data center infrastructure, enabling the next giant leaps in human progress. The company invented the world’s first 3D-stacked photonics engine, Passage™, capable of connecting thousands to millions of processors at the speed of light in extreme-scale data centers for the most advanced AI and HPC workloads.\n\nLightmatter raised $400 million in its Series D round, reaching a valuation of $4.4 billion. We will continue to accelerate the development of data center photonics and grow every department at Lightmatter!\n\nIf you're passionate about tackling complex challenges, making an impact, and being an expert in your craft, join our team of brilliant scientists, engineers, and accomplished industry leaders.\n\nLightmatter is (re)inventing the future of computing with light!\n\nAbout This Role\nWe are 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.\n\nResponsibilities\n\nPlan and execute moderate to complex signal integrity engineering tasks for high-speed interfaces such as PCIe, UCIe and SerDes.\n\nAnalyze high-speed channel characteristics including S-parameters, insertion loss, return loss, and crosstalk to evaluate and optimize signal quality.\n\nPerform signal integrity analysis and simulations (eye diagram analysis, jitter analysis, equalization) by adapting existing practices and procedures to evaluate design choices.\n\nCollaborate with cross-functional teams including hardware designers and PCB layout engineers working on individual and team projects that impact the broader engineering function.\n\nAssist hardware designers in ensuring proper impedance matching, termination, and routing techniques, advising peers on complex signal integrity matters.\n\nPerform detailed signal integrity measurements and characterization using lab equipment (oscilloscopes, network analyzers, TDRs, VNA) to validate design performance and troubleshoot ill-defined issues.\n\nParticipate in signal integrity design reviews, presenting findings and suggesting creative variations in approach to ensure adherence to design specifications.\n\nDocument and communicate signal integrity analysis results and design guidelines to stakeholders, adapting communication style depending on the audience.\n\nQualifications\n\nB.S. or M.S. degree in Electrical Engineering or relevant field with a minimum of 5 years of related experience.\n\nRobust professional and specialized knowledge in signal integrity analysis for high-speed interfaces.\n\nProficiency in using simulation and analysis tools for signal integrity, including Ansys Siwave, HFSS & Keysight ADS.\n\nStrong understanding of transmission line theory, impedance matching, and equalization techniques.\n\nKnowledge of signaling protocols for high-speed interfaces, including SerDes, UCIE, etc.\n\nEnsure robust signal integrity and timing performance for lower-speed critical interfaces and control buses, such as system clocks, SPI, and I2C.\n\nExperience with PCB design and layout considerations for high-speed interfaces (layer stack-up, routing, and via design).\n\nProficiency in using lab equipment for signal measurement and characterization.\n\nAbility to write scripts to automate the simulation flow (Python, JavaScript, Ocean scripts, or SKILL).\n\nPreferred Qualifications\n\nStrong problem-solving and debugging skills for signal integrity-related issues.\n\nUnderstanding of CMOS process technologies and their impact on signal integrity.\n\nDemonstrated ability to network with new stakeholders and collaborate effectively across teams.\n\nAbility to work independently, utilizing best judgment to select appropriate courses of action, with work reviewed at critical checkpoints.\n\nWe offer competitive compensation. The base salary range for this role determined based on location, experience, educational background, and market data.\n\nSalary Range: total compensation goes beyond base salary, it also includes a new hire equity grant, annual performance-based equity, and other rewards that recognize your impact and contribution.\n\n$157,000—$176,000 USD\n\nBenefits\n\nComprehensive Health Care Plan (Medical, Dental & Vision)\n\nRetirement Savings Matching Program\n\nLife Insurance (Basic, Voluntary & AD&D)\n\nGenerous Time Off (Vacation, Sick & Public Holidays)\n\nPaid Family Leave\n\nShort Term & Long Term Disability\n\nTraining & Development\n\nCommuter Benefits\n\nFlexible, hybrid workplace model\n\nEquity grants (applicable to full-time employees)\n\nBenefits eligibility may vary depending on your employment status and location. 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.\n\nExport Control\n\nCandidates should have capacity to comply with the federally mandated requirements of U.S. export control laws.\n\n#J-18808-Ljbffr","company":"Socket","rawCompany":"socket","city":"Mountain View","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-09-02T04:04:37.677Z","occupations":[{"code":"17-2072.00","title":"Electronics Engineers, Except Computer","slug":"electronics-engineers-except-computer"},{"code":"17-2071.00","title":"Electrical Engineers","slug":"electrical-engineers"},{"code":"17-2199.07","title":"Photonics Engineers","slug":"photonics-engineers"}],"industries":[{"code":"334290","title":"Other Communications Equipment Manufacturing","slug":"other-communications-equipment-manufacturing"},{"code":"334419","title":"Other Electronic Component Manufacturing","slug":"other-electronic-component-manufacturing"},{"code":"334413","title":"Semiconductor and Related Device Manufacturing","slug":"semiconductor-and-related-device-manufacturing"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Signal Integrity Engineer","description":"Lightmatter is leading the revolution in AI data center infrastructure, enabling the next giant leaps in human progress. The company invented the world’s first 3D-stacked photonics engine, Passage™, capable of connecting thousands to millions of processors at the speed of light in extreme-scale data centers for the most advanced AI and HPC workloads.\n\nLightmatter raised $400 million in its Series D round, reaching a valuation of $4.4 billion. We will continue to accelerate the development of data center photonics and grow every department at Lightmatter!\n\nIf you're passionate about tackling complex challenges, making an impact, and being an expert in your craft, join our team of brilliant scientists, engineers, and accomplished industry leaders.\n\nLightmatter is (re)inventing the future of computing with light!\n\nAbout This Role\nWe are 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.\n\nResponsibilities\n\nPlan and execute moderate to complex signal integrity engineering tasks for high-speed interfaces such as PCIe, UCIe and SerDes.\n\nAnalyze high-speed channel characteristics including S-parameters, insertion loss, return loss, and crosstalk to evaluate and optimize signal quality.\n\nPerform signal integrity analysis and simulations (eye diagram analysis, jitter analysis, equalization) by adapting existing practices and procedures to evaluate design choices.\n\nCollaborate with cross-functional teams including hardware designers and PCB layout engineers working on individual and team projects that impact the broader engineering function.\n\nAssist hardware designers in ensuring proper impedance matching, termination, and routing techniques, advising peers on complex signal integrity matters.\n\nPerform detailed signal integrity measurements and characterization using lab equipment (oscilloscopes, network analyzers, TDRs, VNA) to validate design performance and troubleshoot ill-defined issues.\n\nParticipate in signal integrity design reviews, presenting findings and suggesting creative variations in approach to ensure adherence to design specifications.\n\nDocument and communicate signal integrity analysis results and design guidelines to stakeholders, adapting communication style depending on the audience.\n\nQualifications\n\nB.S. or M.S. degree in Electrical Engineering or relevant field with a minimum of 5 years of related experience.\n\nRobust professional and specialized knowledge in signal integrity analysis for high-speed interfaces.\n\nProficiency in using simulation and analysis tools for signal integrity, including Ansys Siwave, HFSS & Keysight ADS.\n\nStrong understanding of transmission line theory, impedance matching, and equalization techniques.\n\nKnowledge of signaling protocols for high-speed interfaces, including SerDes, UCIE, etc.\n\nEnsure robust signal integrity and timing performance for lower-speed critical interfaces and control buses, such as system clocks, SPI, and I2C.\n\nExperience with PCB design and layout considerations for high-speed interfaces (layer stack-up, routing, and via design).\n\nProficiency in using lab equipment for signal measurement and characterization.\n\nAbility to write scripts to automate the simulation flow (Python, JavaScript, Ocean scripts, or SKILL).\n\nPreferred Qualifications\n\nStrong problem-solving and debugging skills for signal integrity-related issues.\n\nUnderstanding of CMOS process technologies and their impact on signal integrity.\n\nDemonstrated ability to network with new stakeholders and collaborate effectively across teams.\n\nAbility to work independently, utilizing best judgment to select appropriate courses of action, with work reviewed at critical checkpoints.\n\nWe offer competitive compensation. The base salary range for this role determined based on location, experience, educational background, and market data.\n\nSalary Range: total compensation goes beyond base salary, it also includes a new hire equity grant, annual performance-based equity, and other rewards that recognize your impact and contribution.\n\n$157,000—$176,000 USD\n\nBenefits\n\nComprehensive Health Care Plan (Medical, Dental & Vision)\n\nRetirement Savings Matching Program\n\nLife Insurance (Basic, Voluntary & AD&D)\n\nGenerous Time Off (Vacation, Sick & Public Holidays)\n\nPaid Family Leave\n\nShort Term & Long Term Disability\n\nTraining & Development\n\nCommuter Benefits\n\nFlexible, hybrid workplace model\n\nEquity grants (applicable to full-time employees)\n\nBenefits eligibility may vary depending on your employment status and location. 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.\n\nExport Control\n\nCandidates should have capacity to comply with the federally mandated requirements of U.S. export control laws.\n\n#J-18808-Ljbffr","datePosted":"2026-09-02T04:04:37.677Z","dateModified":"2026-09-02T04:04:37.677Z","hiringOrganization":{"@type":"Organization","name":"Socket","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Mountain View","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"608ae04d7ffb950ddfb5dfe4"},"url":"https://jobsearcher.com/jobs/608ae04d7ffb950ddfb5dfe4"}}