Senior/Principal Signal Integrity Engineer - Silicon Photonics & AI Interconnects

Join Lumilens as a Senior/Principal Signal Integrity Engineer specializing in Silicon Photonics and AI Interconnects. In this pivotal role, you will collaborate with a talented team to innovate and develop cutting-edge solutions that enhance signal integrity in advanced photonic systems.Your expertise in high-speed digital and analog signal integrity analysi…

Job Title: Principal Engineer, Signal Integrity and Power IntegrityOffice Location: San Jose, CAWork Model: OnsiteAbout SK hynix AmericaAt SK hynix America, we are pioneers in semiconductor innovation, leading the development of advanced memory solutions that power a wide array of devices, from smartphones to data centers. As a global frontrunner in DRAM and NAND flash technologies, we are driving the evolution of mobile technology, enhancing cloud computing capabilities, and exploring future technologies. Our state-of-the-art memory technologies are crucial for the most advanced electronic devices and IT infrastructures, providing improved performance and superior user experiences across the digital realm.We invite visionary minds to join our mission of shaping the future of technology. Here at SK hynix America, you will collaborate with a team dedicated to pioneering advanced memory solutions while upholding a strong commitment to sustainability. We are not merely responding to technological advancements; we are leading them through significant investments in artificial intelligence, machine learning, and environmentally friendly practices. As we expand our market influence and redefine the boundaries of semiconductor technology, we welcome you to be a part of our journey in creating the next generation of memory solutions that will shape the future of computing.Job Summary:SK hynix America is on the lookout for a Principal Engineer to spearhead the Signal Integrity and Power Integrity (SIPI) strategy for cutting-edge advanced packaging technologies. In this role, you will be responsible for the design, analysis, and validation of next-generation advanced packaging solutions for HBM and beyond, including logic-memory integration. This position requires extensive technical expertise in high-speed interface design, collaboration with global R&D teams, and contributions to industry standards for advanced packaging.Responsibilities:Strategic Leadership: Define and manage the SIPI roadmap for advanced packaging families, ensuring alignment of technical direction with product and business objectives.Architecture & Design: Lead the development of high-performance SiP architectures (HBM, interposer, 3D stacks) and validate power delivery and signal integrity throughout the entire stack—from silicon to substrate.Methodology Development: Innovate and disseminate best-practice SIPI methodologies, including electromagnetic extraction, multi-port S-parameter modeling, and power-network analysis for complex packaging environments.Technical Ownership: Supervise the complete design flow (package definition, simulation, and validation).

About HarkHark is at the forefront of artificial intelligence, dedicated to creating advanced, personalized intelligence systems that are proactive, multimodal, and capable of seamless interaction through speech, text, vision, and persistent memory.Our mission is to revolutionize human-machine interaction by combining cutting-edge AI with next-generation hardware, establishing a universal interface that transcends traditional chatbots and outdated devices. Hark envisions a future where intelligent systems engage naturally with people and their environments.To realize this vision, we are developing innovative multimodal models and AI hardware, meticulously designed as a unified interface for the next era of intelligent systems.About the RoleWe are seeking a Signal Integrity Engineer to enhance our hardware team and ensure the impeccable performance of our AI-driven devices at the electrical level. In this role, you will conduct Signal Integrity (SI) analysis across high-speed interfaces—such as DDR, PCIe, USB, and MIPI—and collaborate closely with PCB layout, ASIC, and mechanical design teams to overcome the unique challenges posed by compact, thermally constrained form factors. You will run simulations, validate designs in the lab, and integrate your findings into our design rules as we transition from prototypes to mass production.

Astera Labs develops solutions for AI infrastructure, specializing in advanced connectivity technologies. The company partners with hyperscalers and industry leaders to help organizations take advantage of modern AI systems. Their platform combines semiconductor technologies such as CXL®, Ethernet, NVLink, PCIe®, and UALink™ with the COSMOS software suite to deliver reliable, high-performance connectivity. Role overview The Photonics Integrated Circuits Engineer will work on designing and developing photonics integrated circuits as part of Astera Labs' connectivity platform. This role contributes to the integration of advanced semiconductor technologies that support AI infrastructure. Location This position is based in San Jose, CA.

We are seeking a talented Power Integrity Engineer to join our innovative team at Lumilens in San Jose, California. In this role, you will be responsible for ensuring the integrity of power systems within silicon components, contributing to the advancement of our cutting-edge technology.As a Power Integrity Engineer, you will work closely with cross-functional teams to analyze and optimize power distribution networks, develop simulations, and conduct testing to ensure product reliability. Your expertise will play a crucial role in delivering high-performance solutions that meet our clients' needs.

About LumilensAt Lumilens, we are pioneering the foundational photonics infrastructure that will drive the next generation of AI supercomputing. Our innovations, ranging from chip-to-chip optical interconnects to scalable photonic engines, are set to usher in an era of computing that is faster, cooler, and significantly more efficient.As a well-funded startup supported by Mayfield and led by industry veterans, we are not just making incremental advancements; we are embarking on a transformative journey to revolutionize the optical layer from the silicon up. You'll be part of a team comprised of world-class engineers tackling some of the toughest challenges in optics, systems, and scalability. Every line of code, every design decision, and every breakthrough you contribute will play a crucial role in shaping the future infrastructure.If you seek a mission-driven environment with momentum and the opportunity to make a significant impact, come join our exciting journey. We’re just getting started.

Astera Labs offers a Photonics Integrated Circuits Engineer Internship for 2026 in San Jose, CA. This position centers on practical experience with photonic device and integrated circuit design, simulation, and testing. Role overview Interns will contribute to projects that cover various semiconductor processes. The work provides direct exposure to advanced photonics technology, allowing for the application of engineering concepts in real-world settings. What you will do Design and simulate photonic devices and integrated circuits Participate in hands-on testing and evaluation of prototypes Engage with projects involving multiple semiconductor fabrication processes Location This internship is based in San Jose, CA.

Join Lumilens as the Director of Silicon Test Engineering, where you'll lead a talented team in the development of cutting-edge silicon testing strategies. In this pivotal role, you will oversee the design, implementation, and optimization of test processes to ensure the highest quality standards are met. Your leadership will directly contribute to the advancement of our innovative technologies.

About EtchedEtched is pioneering the development of the world's first AI inference system specifically designed for transformer architectures, achieving over 10x greater performance and significantly reduced costs and latency compared to conventional solutions like the B200. With Etched's custom ASICs, you can create innovative products that were previously unattainable with GPU technology, such as real-time video generation models and advanced deep reasoning agents. Supported by substantial investments from top-tier venture capitalists and a team of elite engineers, Etched is transforming the foundational technology layer for the most rapidly evolving sector in history.Job SummaryWe are on the lookout for a talented and driven Post-Silicon Validation Engineer to become part of our vibrant team. The successful candidate will play a pivotal role in bringing up, validating, and characterizing ASICs from the initial silicon phase through to the production ramp-up. This critical position ensures the functional accuracy, performance integrity, and reliability of our advanced AI and machine learning accelerator hardware, facilitating the successful launch of our innovative products.

Join Lumilens as a Principal Engineer in Manufacturing Test PlatformAt Lumilens, we are at the forefront of developing transformative photonics infrastructure that underpins the next generation of AI supercomputing. Our innovations span from cutting-edge chip-to-chip optical interconnects to scalable photonic engines, all aimed at ushering in a new era of computing that is faster, cooler, and significantly more efficient. As a well-funded startup supported by Mayfield and led by industry veterans who have pioneered transformative technologies, we offer a ground-floor opportunity to revolutionize the optical layer from the silicon level up. Join a team of world-class engineers tackling some of the toughest challenges in optics, systems, and scalability. Every line of code you write, every design decision you make, and every breakthrough you achieve will play a crucial role in shaping the infrastructure of the future. If you are seeking a mission-driven role, an energetic environment, and a chance to make a substantial impact, embark on this exciting journey with us. We’re just getting started.Position OverviewIn this pivotal role, you will develop diagnostics and manufacturing software for the design, testing, and productization of cutting-edge photonics solutions for data centers. Collaborating closely with various optical transceiver engineering teams, you will guide projects from initial concept through to final production, ensuring our optical transceiver solutions effectively reach the market.This position requires a solid and diverse software background coupled with a good understanding of hardware design and manufacturing practices. We also encourage applications from candidates with deep expertise in related areas who are eager to learn and grow.Key ResponsibilitiesDesign, implement, and validate manufacturing tests for mass production of photonic products aimed at data centers.Create high-level software abstractions to interface with low-level hardware components.Develop reusable test scripts and modules to validate firmware behavior, execute regression tests, and support new product introduction (NPI) testing and hardware bring-up.Conduct root-cause analysis of reported failures and isolate issues.Monitor, collect, and analyze data to identify issues and propose solutions that enhance system reliability and efficiency.Integrate with databases or dashboards for visualizing and analyzing test results.

Astera Labs (NASDAQ: ALAB) develops rack-scale AI infrastructure, offering advanced connectivity solutions for data centers and AI applications. The company partners with hyperscalers and industry leaders to enable organizations to maximize the potential of modern AI technologies. Its Intelligent Connectivity Platform brings together CXL®, Ethernet, NVLink, PCIe®, and UALink™ semiconductor technologies, integrated with the COSMOS software suite, to support diverse connectivity needs. Astera Labs also delivers custom solutions alongside its standards-based portfolio, helping clients build architectures suited to their specific requirements. More details can be found at www.asteralabs.com. Role overview This AI/ML Intern for Silicon Development Automation role is based in San Jose, CA. The internship centers on developing AI-driven workflows that accelerate silicon chip design. The work involves using generative AI and deep learning to enhance Electronic Design Automation (EDA) processes, with a particular emphasis on frontend design and verification. What you will do Support the creation of AI-powered automation for silicon development, including circuit design, verification, and debugging tasks. Assist in integrating EDA tools with large language model (LLM) capabilities.

Join our team as a Component Engineering Technical Leader specializing in High Speed Interconnect. In this pivotal role, you will lead a team of engineers in designing, developing, and optimizing high-speed interconnect solutions for our cutting-edge products. You will work closely with cross-functional teams to ensure that our designs meet performance, reliability, and manufacturability standards.

JOIN LUMILENSAt Lumilens, we are at the forefront of creating the essential photonics infrastructure that will drive the future of AI supercomputing. By developing chip-to-chip optical interconnects and scalable photonic engines, we are paving the way for a new paradigm of computing that is faster, cooler, and significantly more efficient.Backed by Mayfield, our well-funded startup is led by industry veterans who have successfully built and scaled transformative technologies. This is not just about incremental innovation; it’s a ground-floor chance to revolutionize the optical layer from the silicon level. Collaborate with a team of top-notch engineers to tackle some of the most challenging problems in optics, systems, and scalability. Every line of code you write, every design decision you make, and every breakthrough you contribute will play a pivotal role in shaping the infrastructure of the future.If you’re seeking a mission-driven role with momentum and the opportunity to make a significant impact, come aboard our rocket ship. We are just getting started!

About Hark Hark is at the forefront of artificial intelligence, developing innovative, personalized intelligence systems that are proactive, multimodal, and capable of engaging with the world via speech, text, vision, and persistent memory. We are merging this intelligence with cutting-edge hardware to forge a universal interface that connects humans and machines. Unlike conventional AI that operates through outdated chat boxes and devices, Hark is pioneering the future with agentic systems that engage naturally with individuals and their environments. Our mission is to create multimodal models and next-generation AI hardware, meticulously designed as an integrated interface for a new era of intelligent systems. About the Role As an Integration Engineer, you will take ownership of the integrations layer that empowers Hark's AI agent to be genuinely effective in real-world applications. Your responsibility will be to connect our AI to the tools, services, and data sources that users rely on daily. Your work will involve designing and implementing the protocols, connectors, and execution primitives that enable Hark to perform real actions, such as managing emails, calendars, and third-party API interactions. The true potential of our agentic system hinges on its ability to connect and act. This role offers significant ownership within a compact team where you will collaborate directly with platform engineers and model researchers. The integrations you develop will set the parameters for Hark's capabilities. Responsibilities Design and construct the integration layer connecting Hark's agent to third-party services, including email, calendars, productivity tools, communication platforms, and developer tools. Oversee the complete lifecycle of integrations: from authentication flows to API clients, schema normalization, action execution, and robust error handling. Ensure reliability beyond just the happy path. Establish and implement tool and action protocols that allow the agent to engage with external systems in a secure and consistent manner. Facilitate the seamless addition of new integrations. Collaborate closely with platform engineers to ensure that connectors are integrated smoothly into the agent runtime, ensuring fast, observable, and appropriately sandboxed tool execution. Work in partnership with model researchers to define tool schemas and action semantics that models can reliably interpret, as the quality of the interface directly influences model behavior. Instrument integrations for reliability and accuracy, tracking failures, surfacing regressions, and ensuring rapid feedback loops with the team. Identify high-leverage integration opportunities to maximize impact.

AppZen stands at the forefront of autonomous spend-to-pay software, leveraging patented artificial intelligence to meticulously process data from thousands of sources. Our innovative solutions empower organizations to gain comprehensive insights into enterprise spending, facilitating more informed business decisions. By integrating seamlessly with existing accounts payable, expense, and card workflows, AppZen transforms data into actionable insights, ensuring rapid processing and minimizing instances of fraud and unnecessary expenditures. Trusted by global enterprises, including one-third of the Fortune 500, our invoice, expense, and card transaction solutions replace manual finance processes, enhancing the speed and agility of businesses worldwide. Discover more at www.appzen.com.As an Integration Engineer at AppZen, you will play a pivotal role in designing, implementing, and maintaining integrations between our platform and client enterprise systems. This hands-on technical position demands a focus on delivering robust and scalable integration solutions. You will collaborate closely with customer technical teams, craft code, configure iPaaS platforms, troubleshoot production issues, and ensure seamless data flow across systems. If you thrive on solving intricate integration challenges and take pride in the direct impact of your work on customer success, this is the ideal role for you.

Join Western Digital as an Analog/Mixed Signal Design Engineer and play a pivotal role in developing innovative technologies that drive the future of data storage solutions. You will work alongside a talented team of engineers to design, develop, and optimize analog and mixed-signal components for cutting-edge products.

San Jose or LA, CA (Hybrid)At FloQast, we are on a mission to transform the way accounting teams function by leveraging AI-native workflows. Our platform is a trusted operating system for thousands of global organizations, streamlining complex financial processes into swift, reliable, and scalable systems.We are seeking a Principal Software Engineer who not only develops software but also influences platform architecture, enhances team productivity, and drives significant innovation.This pivotal role involves making architectural decisions that will impact the entire FloQast application ecosystem and propel innovation across our product offerings.

About EtchedAt Etched, we are pioneering the world's first AI inference system specifically designed for transformers, achieving over 10x superior performance while significantly reducing cost and latency compared to traditional B200 systems. Our innovative ASICs empower the development of products that were previously unattainable with GPUs, such as real-time video generation models and advanced deep reasoning agents. Supported by substantial investments from leading venture capitalists and composed of top-tier engineers, Etched is revolutionizing the foundational infrastructure of the fastest-growing industry in history.Job SummaryAs we expand our global deployment of transformer inference systems, Etched is on the lookout for a seasoned Global Supply Manager. This position will be pivotal in shaping our sourcing and supplier strategies for high-speed interconnects, which include cables, connectors, backplane interfaces, and optical/electrical data interconnect solutions.In this role, you will lead the development and management of Etched’s global supply chain for essential interconnect technologies that directly influence system bandwidth, latency, signal integrity, and overall reliability. This strategic position demands collaboration with cross-functional teams, including Electrical Engineering, Systems, and Manufacturing, to deliver scalable, high-performance interconnect solutions as we accelerate our deployment efforts.Key ResponsibilitiesFormulate and implement sourcing strategies for high-speed interconnects, which encompass copper and optical cables, connectors, backplane systems, and high-bandwidth data links.Cultivate and maintain relationships with suppliers in the interconnect, cable assembly, and connector domains across various regions, ensuring performance, quality, and scalability.Negotiate pricing, capacity, tooling, and long-term supply agreements for critical interconnect components and assemblies.Collaborate closely with Electrical and Systems Engineering to determine connector specifications, cable design, signal integrity considerations, and supplier qualification protocols.Lead cost modeling, benchmarking, and should-cost analysis for interconnect components and assemblies across varying system architectures.Ensure that suppliers meet stringent performance metrics, including bandwidth, insertion loss, crosstalk, reliability, and mechanical constraints.Identify and mitigate supply risks associated with prolonged lead times, custom designs, sole sourcing, and regional concentration.Align sourcing strategies with New Product Introduction (NPI) builds, system validation cycles, and high-volume production demands.

Join Our Innovative Team as an Analog/Mixed-Signal Circuit Design Engineer! At SK hynix America, we lead the charge in semiconductor innovation, crafting advanced memory solutions that power everything from smartphones to expansive data centers. As a pioneering force in DRAM and NAND flash technologies, our mission revolves around driving the evolution of mobile technology, enhancing cloud computing, and spearheading future innovations. Our state-of-the-art memory technologies are vital to today’s most sophisticated electronic devices and IT infrastructure, delivering superior performance and user experiences across the digital realm. We invite visionary minds to join us in shaping the future of technology. At SK hynix America, you’ll collaborate with a team dedicated to pioneering cutting-edge memory solutions while upholding a strong commitment to sustainability. We are not merely adapting to technological shifts; we are propelling them forward with substantial investments in artificial intelligence, machine learning, and environmentally conscious operational practices. As we expand our market presence and push the limits of semiconductor technology, we welcome you to be part of our journey in creating next-generation memory solutions that will define the future of computing.

About EtchedAt Etched, we're pioneering the world's first AI inference system uniquely designed for transformers, offering over 10 times the performance with significantly reduced costs and latency compared to B200 systems. Our custom ASICs empower the development of groundbreaking products, including real-time video generation models and highly sophisticated deep reasoning agents. With substantial backing from top-tier investors and a team of exceptional engineers, we are revolutionizing the infrastructure layer essential for today's rapidly evolving industry.Job SummaryWe are on the lookout for a talented Rack Level Integration Engineer to take a pivotal role in the qualification and integration of various components within our data center racks. In this position, you will manage the rack-level integration for our Sohu system product, which includes top-of-rack (ToR) switches, advanced water cooling systems, Coolant Distribution Units (CDUs), heat exchangers, and rack management functionalities. Your responsibilities will include hands-on lab work for racking and stacking, setting up high-touch rack configurations, and ensuring optimal performance, reliability, and readiness for deployment.Key ResponsibilitiesIntegrate and configure all components within a data center rack, including servers, storage systems, networking equipment, power solutions, and cooling systems.Configure and integrate top-of-rack switches for effective rack operation.Manage and integrate high-power water cooling systems, including CDUs and heat exchangers.Set up, test, and qualify comprehensive rack solutions to ensure they meet performance, reliability, and efficiency standards.Integrate and configure smart PDUs to facilitate efficient power distribution and ensure compatibility with rack-level power management.Maintain a thorough understanding of rack-level management functions, including monitoring, control, and automation of components.Perform hands-on lab racking and stacking, including the assembly and setup of intricate rack configurations.Create and sustain detailed documentation for rack-level integrations, covering specifications, installation procedures, test results, and issue tracking.Collaborate closely with cross-functional teams including mechanical engineers, systems engineers, vendors, and integrators to ensure seamless operation at the rack level.Regularly engage with contract manufacturers in Taiwan, both remotely and on-site.