About Atomic SemiAtomic Semi is revolutionizing the semiconductor industry with a compact, high-speed fabrication facility.Using cutting-edge technology and innovative simplifications, we are committed to building our own tools for rapid prototyping and improvement.Our dedicated team of skilled engineers spans various disciplines, including mechanical, electrical, hardware, and process engineering. We take ownership of the entire stack, from atomic-level design to architectural implementation. Our forward-thinking team is passionate about pushing technological boundaries.We believe in the mantra: smaller is better, faster is better, and building it ourselves is essential.With a well-equipped lab featuring 3D printers, advanced microscopes, e-beam writers, and general fabrication tools, we are ready to invent what we need as we progress.Founded by Sam Zeloof and Jim Keller, Atomic Semi combines Sam's unique experience of creating chips in a garage with Jim's extensive 40-year history in the semiconductor field.About the InternshipWe are seeking a passionate RF Power Engineering Intern for the fall semester, starting in September. This internship offers a preferred commitment of 4 to 8 months. You will be directly involved in rebuilding our chip fabrication processes, allowing you to engage in impactful projects. You’ll rapidly develop and test compact RF systems for our fabrication tools, identify challenges, prototype innovative solutions, and turn those prototypes into final products that reshape IC manufacturing.Our swift-paced environment prioritizes getting projects built and tested within days or weeks, rather than months. To apply, please submit a portfolio showcasing your previous work, particularly any medium-to-high complexity systems you've developed through personal projects or internships.Key ResponsibilitiesDesign and develop complete RF power systems, from architecture through schematic to layout.Perform accurate RF power diagnostics and metrology.Collaborate with engineering teams to enhance system performance and reliability.Participate in the prototyping and testing phases of RF systems.Document findings and present results to the team.

Join Redwood Materials as a Power Electronics Intern and contribute to innovative projects that advance sustainable energy solutions. In this role, you will work alongside experienced engineers to gain hands-on experience in the field of power electronics. Your contributions will aid in the development and optimization of advanced technologies that support our mission to build a circular economy.

Join our dynamic team as an Electrical Engineer specializing in Power and High-Voltage Systems!As a key contributor, you will:Design innovative high-voltage DC/DC converters, diode drivers, rectifiers, inverters, and complex power distribution/control circuits.Utilize advanced electrical simulations with SPICE or MATLAB/Simulink to enhance efficiency and reliability.Develop cutting-edge embedded and mixed-signal electronics, integrating microcontrollers and FPGAs for telemetry, protection, and fault management.Design and validate battery management systems and rapid-discharge power solutions, ensuring robust thermal management.Engineer durable wire harnesses and select high-performance connectors/cabling suitable for high-power environments.Lead hands-on prototyping, testing, and environmental/vibration/shock assessments.Conduct DFM reviews and work closely with suppliers to guarantee manufacturability and quality.Create comprehensive schematics, BOMs, and wiring documentation, ensuring compliance with safety and export regulations.Collaborate with mechanical, optical, and controls teams to achieve full system integration.

Join Our Team at Marathon FusionMarathon Fusion is at the forefront of engineering technologies, transforming fusion from experimental breakthroughs into functional power plants. While the industry focuses on innovating new fusion devices, we are dedicated to practical systems that enable fusion energy to operate at a scale that is relevant to climate change.Our team crafts essential fuel cycle and plant-level technologies that support stable isotope production, fuel cycle closure, and advanced blanket systems, facilitating energy generation along with high-value co-products.Founded in 2023, we are committed to constructing the components and systems necessary for making fusion a practical, sustainable, and dependable energy source for the 21st century.Our Company CultureAt Marathon Fusion, we foster a startup culture that values focus, adaptability, and prioritization in a dynamic landscape. Success in our environment hinges on proactive communication, building trust among team members, and a continuous willingness to learn and grow professionally. We highly value self-direction in all team members.Your Role as an Electrical EngineerAs an Electrical Engineer with Marathon Fusion, you will collaborate with our R&D team, which consists of mechanical engineers, physicists, and technicians, to prototype, test, and implement solutions that enhance fusion fuel cycles. Your contributions will be crucial in developing robust power electronics for our Plasma Centrifuge and Transmutation research and development initiatives.Key ResponsibilitiesDesign and develop power electronics subsystems, including capacitor banks, battery systems, power conversion, and switching.Prototype and test printed circuit boards (PCBs) for experimental systems.Integrate power electronics into high-voltage and high-current systems at the platform level.Collaborate closely with mechanical engineers, controls engineers, physicists, and technicians to build and integrate electrical systems into experimental platforms.Conduct testing, validation, and troubleshooting of hardware in laboratory settings.Promote safe design practices for high-energy systems.QualificationsWe welcome applications from candidates with various levels of experience. Ideal candidates will possess:Proven experience in power electronics design.Strong problem-solving skills and the ability to work collaboratively in a team environment.A proactive approach to learning new technologies and methodologies.

About Redwood MaterialsAt Redwood, we are pioneering a sustainable battery supply chain that integrates recovery, reuse, and recycling, effectively keeping critical minerals in circulation and accelerating the energy transition. Established in 2017, we are committed to delivering low-cost, large-scale energy storage solutions and producing battery materials in the U.S. for the first time, all sourced from existing batteries. Power Electronics Engineer, Energy Storage Key Responsibilities:As an integral member of our product design team, you will engage in the detailed design, prototyping, and high-volume production launch of cutting-edge power converters that are efficient, cost-effective, and highly manufacturable.With expertise in high voltage (up to ~1,000 – 2,000VDC and 480VAC) and high power (~10 – 200kW) power converters, you will quantitatively assess and select topologies, control algorithms, semiconductors, and magnetics while adhering to engineering constraints such as efficiency, cost, reliability, and simplicity. Your understanding of both hard- and soft-switched topologies will be essential.

Senior Electrical Engineer, Power Electronics South San Francisco, CA | Ground Systems | Full Time Are you ready to make a significant impact on the world? Zipline is on a mission to revolutionize the logistics of delivery. We’re dedicated to addressing the world’s most pressing access challenges by developing the first instantaneous delivery system that treats all humans equally, no matter their location. From facilitating the national blood delivery network in Rwanda and distributing COVID-19 vaccines in Ghana, to providing on-demand home delivery for Walmart, and enabling healthcare providers to bring services directly to homes across the U.S., we’re reshaping the landscape of logistics for businesses, governments, and consumers alike. Our technology is sophisticated, but the concept is straightforward: a teleportation service that delivers what you need, when you need it. Through our robotics and autonomy platforms, we aim to decarbonize delivery, alleviate road congestion, and enhance access to essential goods globally. About the Role Zipline is in search of a seasoned electrical engineer to spearhead the design and development of high-performance power electronics systems supporting our drone charging and docking infrastructure. As a member of our Ground Systems team, you will be instrumental in managing all ground-based infrastructures that facilitate our autonomous delivery drones, including automatic docking, battery charging, thermal management, ground communication, and preflight checks. This position is key to advancing our next generation of drone logistics by addressing intricate challenges in power distribution, conversion, battery charging, high-performance microprocessor integration, high-speed network communication, and overall system integration. Your extensive technical expertise in power electronics will play a crucial role in shaping Zipline’s global infrastructure as we expand. Additionally, you will collaborate closely with cross-functional engineering teams to oversee the electrical system development from concept to production. This hands-on engineering position is ideal for candidates who aspire to push the boundaries of hardware in practical applications.

Astranis is at the forefront of satellite technology, crafting innovative satellites for high orbits, thereby broadening humanity's exploration of the solar system. Our cutting-edge satellites deliver dedicated, secure networks to a diverse clientele, including large enterprises, sovereign governments, and the U.S. military. With five satellites currently in orbit and numerous launches on the horizon, we are addressing a commercial contracts backlog exceeding $1 billion.As the go-to partner in satellite communications, Astranis is dedicated to fulfilling the stringent requirements of our clients regarding uptime, data security, network visibility, and customization. Backed by over $750 million in funding from top-tier investors, including Andreessen Horowitz, Blackrock, and Fidelity, our team of 450 engineers and entrepreneurs thrives in our 153,000 sq. ft. headquarters located in Northern California, USA.Power Electronics Team LeadIn your pivotal role as the Team Lead for the Power Electronics Engineering Team, you will spearhead the development and leadership of a talented group of Power Electronics engineers. Your support will be key in pushing the limits of what is achievable in geo-synchronous spacecraft design, enabling unprecedented performance in space.

About Atomic SemiAtomic Semi is at the forefront of semiconductor innovation, creating a compact and agile semiconductor fabrication facility.Leveraging current technologies and simplifying processes, we are dedicated to building our own tools to facilitate rapid iterations and enhancements.Our team comprises exceptional hands-on engineers with diverse expertise in mechanical, electrical, hardware, computer, and process engineering. Together, we aim to redefine the technology landscape from atoms to architecture.We are driven by the belief that smaller, faster, and self-built solutions are superior.Our lab is equipped with advanced 3D printers, various microscopes, e-beam writers, and general fabrication tools - and we are always ready to invent what's missing.Founded by Sam Zeloof and Jim Keller, Atomic Semi combines a passion for innovation with decades of industry experience.About the RoleWe are seeking motivated Electrical Engineering Interns for the upcoming fall term, commencing in September, with an ideal commitment of 4 to 8 months. As we reconstruct the chip fabrication process, you will engage in groundbreaking work.You will collaborate with fellow engineers to design and improve lithography systems, deposition tools, vacuum chambers, precision motion controls, plasma etching systems, and related technologies. Your responsibilities will include problem identification, prototyping solutions, and productionizing your innovations to transform IC manufacturing.Our approach emphasizes building and testing within days or weeks rather than months. To apply, please submit a portfolio showcasing your tangible projects. If you have successfully delivered a medium-to-high complexity system through a personal project or prior internship, you will thrive in our environment.

About the TeamFounded in 2018, DoorDash Labs is the innovation engine of DoorDash, dedicated to pioneering automation and robotics solutions that enhance last-mile logistics. Our mission is to develop technologies that empower human networks, driving efficiency for Dashers, merchants, and consumers. With a focus on impactful business solutions, our highly experienced team is composed of industry leaders from various robotics fields. As we look towards the future, we aim to improve upon our achievement of 10 billion deliveries by 2025.About the RoleWe are looking for a Senior Electrical Engineer to join our dynamic, multidisciplinary team, specializing in the creation of production-grade electrical systems for consumer and enterprise hardware platforms, including tablets, POS systems, peripherals, and connected devices.This role requires a robust background in mixed-signal board design, power systems, wireless integration, and high-volume product development. The ideal candidate is passionate about designing and delivering reliable hardware at scale, thriving in an environment that demands technical expertise and high-quality execution across multiple concurrent projects.You’re excited about this opportunity because you will…Architect and implement electrical subsystems, including:Power systems: battery management, charging, DC/DC converters, power distribution, and protection.Digital and mixed-signal board design: application processors, MCUs, high-speed interfaces (USB, PCIe, MIPI, etc.), memory, and sensor integration.Wireless systems: WiFi, BLE, LTE, antennas, and EMI/EMC-conscious layout and integration.Peripheral and display integration: touch interfaces, display subsystems, and external connectivity.Key ResponsibilitiesOwn the full lifecycle of electrical hardware from concept through schematic capture, layout review, bring-up, validation, certification, and production.

High Voltage Electrical Engineer / TechnicianLocation: Bay Area, in-person preferredAbout the RoleAt Thunderstone, we are seeking a proactive and skilled High Voltage Electrical Engineer or Technician to play a vital role in our lab operations. You will assume responsibility for the safe and efficient functioning of our high-voltage systems, including our Marx generators. Your expertise is crucial in ensuring our core technology operates seamlessly, facilitating rapid experimentation and advancing the forefront of innovation. This position can be full-time or part-time, with a requirement for on-call availability to maintain our essential systems.Key ResponsibilitiesOversee our high-voltage pulse power systems, including Marx generators and Cockcroft–Walton multipliers, ensuring their readiness for experiments.Quickly diagnose and resolve issues using diagnostic tools like oscilloscopes and multimeters, from minor wiring adjustments to complex system optimizations.Uphold and enhance our safety protocols and electrical standards, as your commitment to safety is of utmost importance.Work collaboratively with the engineering team to support rapid experimental setups and prototyping.Provide prompt assistance for urgent troubleshooting or setup needs to minimize downtime and keep experiments on schedule.Diligently document system performance, safety checks, and improvements to contribute to a scalable and robust operation.Who We AreThunderstone is a pioneering deep-tech startup dedicated to transforming the way the world accesses critical metals. Our approach redefines traditional mining practices, which are often excavation-heavy, costly, and harmful to the environment. We utilize underground lightning (high-voltage pulses) to create microscopic pathways in ore bodies, allowing fluids to flow and extract metals without extensive digging.Our innovative methods make mining cleaner, more cost-effective, and scalable, enabling the extraction of essential metals like nickel and copper that are vital for the clean energy transition. Proudly part of the Breakthrough Energy Fellows program, we are supported by top-tier investors and strategic partners, including Rio Tinto.Join us at Thunderstone, where your contributions will not only propel our experiments forward but also help create a sustainable future for our planet.

Join Notion Labs Inc. as a Software Engineer Intern for the Fall 2026 semester! This is an exciting opportunity to work in a dynamic environment where you will contribute to innovative projects and gain hands-on experience with cutting-edge technologies.As an intern, you will collaborate with our talented engineering team to develop and improve our software solutions. You'll have the chance to enhance your skills in programming, problem-solving, and teamwork while making a real impact in our organization.

About Redwood MaterialsRedwood is pioneering a localized battery supply chain that integrates recovery, reuse, and recycling—ensuring critical minerals remain in circulation and facilitating the energy transition. Established in 2017, we are at the forefront of delivering affordable, large-scale energy storage while producing battery materials in the U.S. for the first time, utilizing batteries we already possess. The Redwood Vision: Modernizing the GridEnvision being at the forefront of a significant industrial transformation. Just as the electric vehicle revolution redefined automobiles as software-driven entities, Redwood Materials is revolutionizing the global energy grid. We go beyond merely managing batteries; we are constructing the "nervous system" for a sustainable energy economy.Our R&D team in San Francisco is spearheading the shift from outdated, hardware-centric infrastructures to agile, software-driven ecosystems. We are demonstrating that a sustainable, 100% renewable grid is not just a goal—it’s a technical reality fueled by advanced control intelligence. We seek the "architects of the electron" to help us phase out fossil-fuel peaker plants.Position: Senior Power Electronics Controls EngineerIn this role, you will spearhead the design and implementation of the intelligent control systems for our cutting-edge Battery Energy Storage Systems (BESS) and mixed-asset energy sites. You will oversee the entire lifecycle of our control systems—from initial conceptualization and advanced modeling to assessing real-world grid impacts. Your contributions will ensure that both recycled and new battery assets work in unison to stabilize the grid and maximize high-power conversion at an industrial scale.

Join Atomic Semiconductor as a Circuit Design Intern!Atomic Semiconductor is on a mission to revolutionize semiconductor manufacturing with a compact, high-speed fabrication facility. Our innovative approach leverages existing technology with strategic simplifications to drive rapid iterations and improvements.Our dedicated team comprises skilled engineers from diverse fields, including mechanical, electrical, hardware, and computer processes. We take pride in owning our entire stack, from atomic structures to architectural designs. Together, we are committed to pushing technological boundaries and redefining the future of semiconductors.Our philosophy is simple: smaller, faster, and self-built solutions are superior. With a fully equipped lab featuring 3D printers, various microscopes, e-beam writers, and fabrication equipment, we believe in our team's capability to create anything we envision.Founded by renowned industry experts Sam Zeloof and Jim Keller, Atomic Semiconductor is at the forefront of semiconductor innovation.About the InternshipWe are seeking enthusiastic Circuit Design Interns for the upcoming fall term, starting in September, with an ideal commitment of 4 to 8 months. You will play a vital role in the reconstruction of chip fabrication processes, engaging in impactful work that directly influences our internal design teams and future clients. Responsibilities include circuit design, standard cell layout, device characterization, and CAD flow development. You will utilize tools such as NGSpice, K-Layout, OpenROAD, along with proprietary technologies.Our rapid development philosophy prioritizes getting projects built and tested within days or weeks, rather than months. As part of the application process, a portfolio showcasing your completed projects is required. Demonstrating experience in shipping medium to high-complexity systems through personal projects or past internships will make you an excellent candidate.

About TacitTacit is a pioneering deep tech startup located in San Francisco, focused on creating groundbreaking hardware that transforms human-computer interaction. Supported by notable investors such as General Catalyst, Khosla Ventures, and Greylock Partners, our founding team comprises experts from Stanford, BrainGate, Oculus, and Tesla. While we are unable to disclose extensive details at this moment, our team is passionately addressing advanced engineering challenges to develop revolutionary products.About the RoleWe are on the lookout for a driven Electrical Engineering Intern to assist in the development and scaling of test infrastructure for our innovative sensing technology. This internship will provide you with hands-on experience across hardware, firmware, and automation systems, emphasizing the enhancement of test coverage and product reliability. You will have the opportunity to engage in collaborative learning and actively participate in product development within a vibrant startup atmosphere.What You'll DoAutomate lab equipment and validation workflowsDesign and construct custom PCBs for test jigsContribute to embedded firmware to support test hooks and diagnosticsDevelop a continuous integration (CI) test rack to automatically validate firmware releases and sensor performanceAssist in sensor characterization and calibration to minimize device-to-device variabilityDocument and effectively communicate engineering findings and recommendations.Ideal Candidates May HaveProficiency in Python, PCB Design (Altium), Embedded C/C++A strong independent work ethic, adaptability, and resourcefulness.Excellent communication and teamwork abilities.Comfort in a fast-paced startup environment, with a passion for independent building.CompensationHourly rate determined by your individual skills and experience.

About TacitTacit is an innovative, early-stage deep tech startup located in San Francisco, focused on developing groundbreaking hardware to redefine human-computer interactions. With support from prominent investors such as General Catalyst, Khosla Ventures, and Greylock Partners, our founding team brings expertise from renowned institutions including Stanford, BrainGate, Oculus, and Tesla. While we are not ready to disclose our projects fully, we are committed to solving complex engineering challenges to launch revolutionary products.Position OverviewWe are seeking a talented Senior Electrical Engineer to lead the architecture, design, and deployment of next-generation neurotechnology hardware products. As a pivotal member of our expanding hardware team, you will take ownership of significant components of our electrical systems from initial design stages to mass production, playing a crucial role in the realization of sophisticated consumer electronics.Key ResponsibilitiesElectrical System Design & DevelopmentLead the electrical architecture and board-level design for mixed-signal consumer hardware systems from concept to production.Oversee schematic design and guide the development process through EVT, DVT, PVT, and mass production stages.Define system partitioning, interfaces, and component selection across computing, sensors, connectivity, and power subsystems.Conduct rigorous design reviews and establish robust electrical design and manufacturing standards.Collaborate closely with mechanical, firmware, and software teams to enhance performance, size, thermal behavior, and reliability.Effectively navigate a startup environment where engineers manage substantial parts of the hardware stack.High-Speed and High-Density Hardware DesignDesign high-density, multi-layer PCBAs employing HDI techniques, fine-pitch BGAs, and controlled-impedance routing.Implement high-speed digital interfaces such as USB, Quad-SPI, MIPI, CSI/DSI, DDR, or similar buses.Create analog and mixed-signal circuits, including amplifiers, filters, sensor interfaces, and ADC/DAC connections.Optimize PCB layout for signal integrity, power integrity, and low-noise performance.Power Electronics & Battery SystemsDesign and implement power electronics and battery management systems for our devices.Ensure compliance with safety and regulatory standards while optimizing performance and efficiency.

Join aisafety as a Research Engineer Intern for the Fall 2026 term! This internship is an excellent opportunity to gain hands-on experience in the field of safety engineering, where you will collaborate with seasoned professionals on innovative projects. You will be involved in research and development activities, contributing to advancements in safety solutions.

Astranis builds satellites for high orbits, delivering secure communication networks to enterprises, government agencies, and the U.S. military. With five satellites already in orbit and a strong backlog of commercial contracts, the company continues to expand its reach. Astranis operates from a 153,000 sq. ft. headquarters in Northern California, where a team of 450 engineers and entrepreneurs design, build, and manage advanced satellite systems. The company is supported by over $750 million in funding from major investors. Internship Overview The Communications and DSP Engineering Intern position for Fall 2026 is a 12-week program based in San Francisco. This internship is intended for students currently enrolled in a four-year university. Interns work on real projects from the start, contributing to both hardware and software used in Astranis satellite missions. Many previous interns have gone on to join the company full-time after their internships. What You Will Do Design and implement signal processing algorithms for custom software-defined radio hardware, including tasks like channelization, equalization, and gain control. Work closely with FPGA developers to integrate and test signal processing functions on radio hardware. Model end-to-end radio systems to support communication between Earth and space. Perform radio architecture trade studies, optimize system performance, and manage link budgets for a range of global applications.

About Atomic SemiAtomic Semi is at the forefront of semiconductor innovation, creating a compact and efficient fabrication environment that leverages cutting-edge technology.We are committed to building our own tools to facilitate rapid iterations and enhancements to our processes.Our elite team of engineers, specializing in mechanical, electrical, hardware, computing, and process engineering, is dedicated to pushing the boundaries of technology from atoms to architecture.We believe smaller, faster, and self-built systems represent the future.Equipped with advanced 3D printers, microscopes, e-beam writers, and a variety of fabrication tools, we’re prepared to invent solutions as we encounter challenges.Founded by renowned semiconductor experts Sam Zeloof and Jim Keller, Atomic Semi combines years of industry experience with a passion for innovation.About the RoleWe are seeking enthusiastic Process Engineering Interns for the fall term, starting in September. This internship is designed for a duration of 4 to 8 months, providing you with a unique opportunity to engage in groundbreaking work as we re-engineer the chip fabrication process from the ground up.This hands-on role will have you involved in the design and execution of experiments related to novel semiconductor and thin-film fabrication techniques. We are looking for candidates with a solid understanding of traditional semiconductor processing methods and an eagerness to explore innovative techniques.This position offers a high level of ownership and autonomy in a dynamic startup environment, allowing you to contribute meaningfully to novel R&D processes and influence equipment design. Candidates should possess hands-on cleanroom experience and a proven track record of developing nanofabrication recipes across multiple process stages.

About Atomic SemiAtomic Semi is pioneering a compact and rapid semiconductor fabrication facility. Our goal is to harness today’s technology to build innovative solutions with streamlined processes. We are committed to creating our own tools to facilitate swift iterations and enhancements.We are assembling a small team of exceptional, hands-on engineers across various disciplines, including mechanical, electrical, hardware, computer, and process engineering. Our team will take ownership from atomic-level designs to complete architectural solutions. We are optimistic about the future and eager to push the boundaries of technology.We believe that smaller, faster, and self-built solutions are superior. Our lab is equipped with advanced tools such as 3D printers, a variety of microscopes, e-beam writers, and general fabrication equipment, and we are ready to invent whatever is missing along the way.Atomic was founded by Sam Zeloof and Jim Keller. Sam is renowned for his garage-made chips, while Jim brings over 40 years of leadership experience in the semiconductor industry.About the RoleWe are seeking an Automation Software Engineering Intern for the upcoming fall semester, starting in September. We prefer a commitment of 4 to 8 months. As part of an integrated engineering team, you will engage in building semiconductor fabrication equipment, tackling intriguing engineering challenges.Our small size enables interns to undertake significant responsibilities, contributing to mission-critical projects. You will enjoy substantial autonomy on interdisciplinary initiatives that enhance our semiconductor fabrication processes and improve robot efficiency. Ideal candidates should have a background in motor controllers, path planning, and trajectory control.We prioritize rapid prototyping and testing—aiming to build and verify solutions within days or weeks, not months. Therefore, a portfolio showcasing your work (such as a GitHub link) is required to apply, demonstrating your software engineering skills and curiosity.