Power Electronics Test Engineer

Astranis is at the forefront of satellite technology, designing advanced satellites for high orbits that extend humanity's reach into the solar system. Our innovative satellites deliver dedicated, secure networks to a diverse clientele, including large enterprises, sovereign governments, and the US military. With five satellites currently in orbit and a robu…

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.

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 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.

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.

About Us:Aurelius Systems is an innovative, VC-backed defense technology startup focused on developing autonomous, edge-deployed robotics systems utilizing directed energy for counter-unmanned aerial systems (UAS).Our mission is to create laser weapon systems capable of neutralizing drones effectively.With a compact team of around ten engineers, ex-US military personnel, and subject matter experts, we are at the forefront of advancing America's capabilities in directed energy. Our aim is to deliver the first cost-effective, reliable, and robust laser weapon system.Inspired by the principles of Marcus Aurelius, we embrace a culture of relentless effort, with a commitment to delivering exceptional results without excuses. We operate in a flexible environment, leveraging our San Francisco lab and office, alongside our Detroit manufacturing hub, and conduct weekly field tests on our expansive 400-acre private range.If you're an engineer who prefers to witness your work in action rather than confined to a lab, we invite you to continue reading.The Opportunity:As the Power Electronics Engineer, you will lead the development of the power subsystem for our directed energy weapon systems.Your role entails being the technical lead on all aspects ranging from battery pack architecture to laser diode integration. You will not merely implement existing designs; instead, you will define the architecture, make critical decisions, and take ownership of your system during range tests.You will collaborate closely with the electrical engineer on the team, focusing on a depth of knowledge rather than breadth. Your responsibilities will include battery management system (BMS) architecture, high-voltage conversion, fault protection, and power delivery under various field conditions. When a power system issue arises during a range test, you will be the go-to expert, identifying the problem and implementing a solution promptly.Your Responsibilities:Design, develop, and validate battery management systems for high-voltage battery packs, ensuring safe charge/discharge cycles, cell balancing, thermal management, and fault protection.Engineer high-voltage DC/DC converters, rectifiers, inverters, and diode driver electronics for optimal laser power delivery.Create robust wire harnesses for high-power laser and motor systems, focusing on connector selection, routing, shielding, and environmental resilience.Engage in hands-on prototyping, assembly, and testing on our expansive range.Conduct rigorous electrical, environmental, vibration, shock, and robustness testing to ensure system reliability.

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.

Astranis is at the forefront of space technology, dedicated to building cutting-edge satellites for high orbits, thereby extending humanity’s capabilities into the solar system. Our satellites deliver secure, dedicated networks to a diverse clientele including large enterprises, sovereign governments, and the U.S. military. With five satellites successfully in orbit and numerous launches on the horizon, we are tackling a significant backlog valued at over $1 billion in commercial contracts.As the go-to partner for satellite communications, Astranis meets the highest standards for uptime, data security, network visibility, and customization. Backed by over $750 million in funding from leading investors such as Andreessen Horowitz, Blackrock, and Fidelity, our team of 450 engineers and entrepreneurs thrives in a stimulating environment. Our operations are conducted from our extensive headquarters in Northern California, covering 153,000 square feet.Power Electronics Intern (Fall 2026)Join us for a twelve-week internship designed for current students enrolled in a four-year university.As an intern, you will engage in challenging projects that contribute meaningfully to our mission. Many of our past interns have successfully designed and tested hardware and software that is now heading to space, and many have transitioned to full-time roles within Astranis.If you have completed a four-year degree, we encourage you to apply for an Associate Engineer position.Role ResponsibilitiesCollaborate with the power engineering team to construct and test flight hardware.Develop test equipment to validate designs under various stressed conditions.Create prototype circuits.Assist in bringing up and debugging designs in the lab.Write software to assess performance and automate satellite hardware testing.Coordinate assembly, integration, and environmental testing efforts.

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.

Astranis is at the forefront of satellite innovation, designing and building advanced satellites for high orbits that expand humanity’s reach into the solar system. Our satellites deliver dedicated, secure networks to sophisticated clients globally, including large enterprises, sovereign governments, and the US military. With five satellites currently in orbit and many more set to launch, we are committed to fulfilling over $1 billion in commercial contracts.Astranis is the trusted partner for satellite communications, meeting the stringent demands for uptime, data security, network visibility, and customization. Having secured over $750 million from renowned investors such as Andreessen Horowitz, Blackrock, and Fidelity, our team consists of 450 talented engineers and entrepreneurs based in a state-of-the-art 153,000 sq. ft. headquarters in Northern California, USA.Senior Electronics Component EngineerAs a Senior Electronics Component Engineer at Astranis, you will be instrumental in selecting high-quality, reliable, and sourceable EEE parts and components for our satellite systems. This role demands a thorough understanding of part construction, the ability to identify potential quality and reliability risks, and the expertise to define and implement essential screening tests to mitigate these risks efficiently.Role ResponsibilitiesAnalyze part construction to uncover quality and reliability risks, ensuring all components meet mission-critical standards.Collaborate closely with design engineers to facilitate component selection during the design phase, ensuring compliance with Astranis’s rigorous standards.Plan, execute, and oversee component-level screening and qualification testing.Review bills of materials for new designs to confirm the use of approved flight parts.Manage component supplier part change notifications and initiate appropriate responses to supplier PCNs.Conduct tear-downs on critical components to evaluate part quality and reliability.Work with supply chain, design, and manufacturing teams to resolve component-related sourcing challenges.Maintain the Astranis approved parts list in PLM to ensure accurate information is available to engineering and manufacturing teams.

Join our dynamic team at plaud as an Electronic Engineer. In this role, you will be responsible for designing, developing, and testing electronic systems and components. Your innovative solutions will help drive our projects forward, ensuring we remain at the forefront of technology.

Astranis is at the forefront of developing cutting-edge satellites for high orbits, paving the way for humanity's exploration of the solar system. Our satellites currently deliver dedicated, secure networks to sophisticated clients around the world, including large corporations, government entities, and the U.S. military. With five satellites already in orbit and numerous launches planned, we are addressing a robust backlog of over $1 billion in commercial contracts.Astranis stands as the trusted satellite communications partner for those who demand high standards in uptime, data security, network visibility, and customization. Having secured over $750 million in funding from top-tier investors like Andreessen Horowitz, Blackrock, and Fidelity, we proudly employ a team of 450 skilled engineers and entrepreneurs. Our operations are based out of a state-of-the-art 153,000 sq. ft. headquarters in Northern California, USA.Electronics Engineering ManagerAs the Electronics Engineering Manager, you will lead and inspire a team of skilled electronics engineers. Your leadership will be crucial in defining the future of our satellite technology, pushing the limits of innovation, and delivering unparalleled performance that redefines industry benchmarks.Role ResponsibilitiesDirectly manage, mentor, and grow a diverse team of junior and senior electronics engineers.Collaborate with a multidisciplinary team to design and architect our next-generation electronic systems.Oversee the lifecycle of electronic hardware from design and development to implementation and verification.Create and manage a detailed project schedule to ensure hardware development aligns with program timelines.Drive the design process, including specifications, component selection, circuit board design, and system-level integration.Lead hands-on debugging, board bring-up, and system validation processes.Participate in recruiting, interviewing, and onboarding new talent to support our rapid expansion.Provide expert support to production and operations teams for the effective deployment and utilization of our hardware.Encourage a culture of innovation and excellence within the team.

Join Our Innovative Team at Atomic SemiAt Atomic Semi, we are pioneering the future of semiconductor manufacturing with our state-of-the-art, compact fabrication facilities.Our approach leverages current technologies and innovative simplifications, enabling us to create our own tools for rapid iteration and enhancement.We are assembling a select group of exceptional engineers—mechanical, electrical, hardware, computer, and process specialists—who will take ownership of the entire stack from atomic structures to architectural designs. Our optimistic team is dedicated to advancing technology boundaries.We believe that smaller, faster, and self-built solutions are the key to success.Our facility is equipped with 3D printers, a variety of microscopes, e-beam writers, and general fabrication equipment. If there’s something we need, we’ll innovate to create it.Founded by Sam Zeloof and Jim Keller, our team combines practical chip-making experience with decades of industry leadership.Role OverviewAs an Electronic Hardware Design Engineer, you will collaborate with a talented team to design cutting-edge lithography systems, deposition tools, vacuum chambers, and high-precision motion control systems. You will tackle challenges, prototype innovative solutions, and bring your designs to production, contributing to transformative advancements in integrated circuit manufacturing.Your projects may involve high-voltage low-noise converters, motor drivers, attofarad sensors, and millikelvin temperature controllers—all in a single initiative.

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.

Join Our Innovative TeamLumafield is seeking a skilled Quality Assurance (QA) Test Engineer to play a pivotal role in ensuring the excellence and dependability of our advanced, cloud-based web application, Voyager. In this hands-on position, you will be responsible for implementing and refining our QA strategy, seamlessly integrating manual exploratory testing with robust automation testing to provide our users with a flawless, high-quality experience in industrial inspection.

Join Ranger as a Forward-Deployed Test Engineer!At Ranger, we are on a mission to transform software testing through our innovative AI-powered platform. We empower the world’s leading engineering, product, and design teams to focus on what they do best: building exceptional products.Our collaborations with some of the fastest-growing companies, including Clay, Suno, Dust, and a partnership with OpenAI, showcase our commitment to excellence in quality assurance. With a total funding of $8.9M across two rounds led by XYZ and General Catalyst, we are poised for significant growth and impact.Why Ranger is a Game ChangerIntelligent Test Generation: Our advanced LLMs automatically generate reliable and efficient Playwright tests.Self-Healing Tests: We proactively identify and resolve flaky tests to maintain consistent and dependable test suites.Enhanced Failure Insights: Receive automated failure reports detailing probable causes and comprehensive steps to reproduce issues.Role OverviewAs a Forward-Deployed Test Engineer, you will spearhead customer success by developing and managing comprehensive Playwright test suites using our cutting-edge AI platform. From onboarding to renewal, you will cultivate a strong technical relationship with customers, converting their testing requirements into robust automated frameworks.This position calls for a technically adept problem-solver who can write high-quality test code while fostering strong customer relationships. You will balance hands-on test development with strategic account management to maximize the value our customers derive from our testing services.

Company OverviewEcho Neurotechnologies is a pioneering startup specializing in Brain-Computer Interface (BCI) technology. We are committed to pushing the boundaries of innovation through state-of-the-art hardware engineering and artificial intelligence solutions. Our goal is to create transformative technologies that empower individuals with disabilities, enhancing their autonomy and overall quality of life.Team CultureBecome a part of our dedicated team of passionate and skilled professionals. In our dynamic early-stage environment, you will have the chance to influence key decisions that will have lasting impacts. We prioritize continuous learning and development, promoting cross-functional collaboration where your input is essential to our collective success.Role OverviewWe are on the lookout for a seasoned Senior Hardware Test Engineer to validate our custom Echo hardware systems. In this role, you will lead the testing processes for our specialized hardware devices and subsystems while developing and implementing custom test systems.Primary ResponsibilitiesConduct in-house design verification testsCoordinate testing with external laboratoriesCollaborate with the engineering team to create tailored testing solutionsWork alongside design engineers to characterize unique hardwarePrepare tests for vendor transfer

About Poseidon Aerospace:At Poseidon Aerospace, we specialize in the design and operation of unmanned aircraft tailored for commercial logistics and defense applications. Our state-of-the-art fixed-wing platforms, including the Heron seaplane and the Egret STOL aircraft, are engineered to transport payloads of up to two tons across distances exceeding a thousand nautical miles. With our headquarters in the vibrant city of San Francisco and additional offices in Washington, DC and Maine, we are at the forefront of aviation innovation.As a Test Engineer, you will spearhead the comprehensive testing processes for our unmanned cargo aircraft. This role involves defining test objectives, executing hardware and flight tests, and analyzing data to ensure optimal performance and safety. A systems-level understanding of aircraft designs coupled with a structured testing approach is essential to translate complex data into actionable insights.

About Atomic SemiAtomic Semi is pioneering the development of a compact, high-speed semiconductor fabrication facility.Leveraging current technology and innovative modifications, we are crafting tools in-house to enable rapid iterations and enhancements.We are assembling a small but exceptional team of hands-on engineers across disciplines including mechanical, electrical, hardware, software, and process engineering. Our goal is to take ownership of the entire stack, from the atomic level to architectural innovations. Our team is driven by optimism about the future and is eager to push the boundaries of technology.We believe that smaller and faster is better, and building our solutions ourselves is the way forward.Our lab is equipped with 3D printers, a diverse range of microscopes, e-beam writers, and general fabrication equipment – and we are committed to inventing whatever we need along the way.Founded by Sam Zeloof and Jim Keller, Atomic Semi combines a history of groundbreaking work in chip development with seasoned expertise in the semiconductor industry.About the RoleAs a Semiconductor Test Development Engineer at Atomic Semi, you will be integral in connecting process development with electrical testing. Your responsibilities will include characterizing semiconductor devices, designing and automating test infrastructures, and extracting vital electrical parameters to guide process enhancements. This role demands hands-on involvement and strong collaboration with process, test, and design engineers.We seek a passionate engineer eager to work across disciplines in developing probe cards, designing test structures, performing electrical characterizations, and creating automation frameworks. A solid foundation in device physics and experience with CMOS modeling (e.g., BSIM) will significantly contribute to parameter extraction and feedback into process development.This position offers the chance to engage with the full testing stack, from test structure design to silicon fabrication and data analysis, helping to shape our validation and improvement processes of CMOS in a dynamic startup environment.