Senior Power Electronics Engineer - Ground Systems

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.

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.

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.

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.

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.

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.

Astranis is at the forefront of space technology, crafting cutting-edge satellites designed for high orbits, which significantly broaden our capabilities within the solar system. Presently, Astranis satellites deliver dedicated and secure networks to a diverse range of sophisticated clients globally, including large corporations, sovereign governments, and the U.S. military. With five satellites already in orbit and numerous launches on the horizon, we are actively addressing a backlog exceeding $1 billion in commercial contracts.Astranis stands as the preferred partner in satellite communications, recognized for our unwavering commitment to uptime, data security, network visibility, and tailored solutions. With over $750 million raised from top-tier investors, including Andreessen Horowitz, Blackrock, and Fidelity, our team of 450 engineers and entrepreneurs designs, builds, and operates satellites from our expansive 153,000 sq. ft. headquarters in Northern California, USA.Senior Technical Program Manager - Ground SystemsIn this pivotal role as the Technical Program Manager for Ground Systems, you will collaborate with cross-functional teams at Astranis to oversee every facet of Ground program execution, encompassing both software and hardware development and operations. This high-impact and visible position within our Technical Program Management team will focus on leading and managing the ground-based infrastructure and systems essential for satellite operations and missions.

Role Overview Loft Orbital is looking for a Senior Ground Segment Engineer in San Francisco, CA. This position focuses on developing and maintaining the software and systems that connect our growing fleet of satellites to ground stations and inter-satellite links. The work involves managing multiple satellite buses and configurations, ensuring reliable and scalable communication across the network. What You Will Do Configure Cockpit, Loft’s mission control system, to improve ground segment connectivity. Collaborate with ground station providers and internal product teams to strengthen our communications infrastructure. Oversee cross-fleet contact allocation and planning, aiming to maximize communication opportunities and minimize latency. Work closely with teams across Space Infrastructure, Spacecraft Deployment, Mission Deployment and Execution, and regulatory functions to manage and prepare satellites for operations. Participate as a rotating Flight Director, monitoring and ensuring the health and safety of the satellite fleet. What Sets This Role Apart This position offers the chance to work on a wide range of satellite connectivity challenges and play a key role in shaping Loft Orbital’s satellite operations. The role blends technical hands-on work with cross-team coordination, and provides opportunities for professional growth. Expertise in network infrastructure will help maintain the reliability of our global satellite network and support exceptional service delivery.

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 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.

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.

About Redwood MaterialsAt Redwood, we are revolutionizing the global battery supply chain by integrating recovery, reuse, and recycling—ensuring critical minerals remain in circulation and accelerating the energy transition. Established in 2017, we are pioneering low-cost, large-scale energy storage solutions and producing battery materials domestically in the U.S. for the first time, all sourced from existing batteries.Position: Power Systems Engineer - Energy StorageKey Responsibilities:Collaborate with product and controls design teams to translate power system requirements into specifications for site and inverter controllers, thereby influencing control architecture at both system and plant levels.Engage in the design and optimization of power systems for energy storage applications, ensuring efficiency and reliability.Analyze and improve existing power systems, focusing on performance and scalability.

Welcome to Planet. We harness the power of space to enhance life on Earth.At Planet, we design, build, and operate the world’s largest constellation of imaging satellites, delivering an unparalleled dataset through our innovative cloud-based platform. This initiative supports a diverse array of industries including commercial, environmental, and humanitarian sectors, positioning us as both a space and data enterprise.Our clients worldwide leverage Planet's data to pioneer new technologies, generate revenue, conduct research, and tackle some of the planet's most pressing challenges.With complete control over hardware design, manufacturing, data processing, and software engineering, our team is an inspiring blend of experts from various fields.We prioritize a people-centric culture and community, continuously evolving to put our team members first as we prepare for growth. Join us at Planet and be part of our mission to transform global perspectives.Planet operates globally, with a flexible working environment that includes remote employees and offices in San Francisco, Washington DC, Germany, Austria, Slovenia, and The Netherlands.About the Role:The Mechanical Engineering team at Planet seeks a skilled Senior Mechanical Engineer to lead the design of critical spacecraft subsystems for our fleet of Earth-imaging satellites. Your role will encompass overseeing spacecraft design initiatives, from subsystem to full spacecraft level. The ideal candidate will be an experienced mechanical designer with a proven track record in leading mechanical subsystem development through all phases, from conceptualization to manufacturing, testing, and flight integration. As a vital member of the Mechanical Engineering team within Planet’s Space Systems division, you will collaborate closely with various teams to drive our agile approach to spacecraft design.This is a full-time position based at our San Francisco headquarters, requiring in-office attendance five days a week.

Echo Neurotechnologies builds Brain-Computer Interface (BCI) hardware and artificial intelligence solutions in San Francisco. The team’s work centers on developing technology that supports greater independence and quality of life for people with disabilities. At Echo Neurotechnologies, a small and skilled group collaborates closely. Team members often contribute across different functions, and each person’s input shapes the direction of projects. The environment values hands-on work, learning, and growth, giving everyone a real chance to influence outcomes. Role overview This Senior Electronics Technician position is hands-on and emphasizes careful craftsmanship. The role suits someone who takes pride in precision and wants to see their work directly impact medical technology. Practical experience matters more than formal degrees for this position. Key responsibilities Solder and rework printed circuit boards (PCBs), including 0201 discretes and fine-pitch BGAs, using magnification tools Modify boards, troubleshoot issues, and support rapid design changes Follow detailed work instructions, schematics, and testing protocols accurately Test both incoming and assembled hardware, recording results clearly Inspect incoming hardware to ensure quality standards are met Help organize and maintain the lab, including equipment upkeep and basic management tasks Calibrate and maintain test equipment, and coordinate with outside vendors as needed Work closely with engineers to solve problems and improve designs Requirements Strong hands-on experience with fine-pitch soldering and PCB rework Comfort working under magnification with small, fragile components

CoreWeave is The Essential Cloud for AI™. Designed by innovators for innovators, CoreWeave provides a robust platform of advanced technology and exceptional teams, empowering organizations to confidently build and scale AI solutions. As a trusted partner for leading AI labs, startups, and global enterprises, CoreWeave integrates unmatched infrastructure performance with extensive technical expertise, driving innovation and transforming compute capabilities into actionable results. Since its inception in 2017, CoreWeave has rapidly advanced, becoming a publicly traded company (Nasdaq: CRWV) in March 2025. Explore more at www.coreweave.com.What You’ll Do:Description of the TeamThe IT Business Systems (GTM) team at CoreWeave is responsible for the application stack that facilitates the entire customer journey—from lead generation to quoting and cash collection. This team designs and manages systems that underpin a rapidly growing AI cloud business, collaborating closely with Revenue Operations, Marketing Operations, Finance, Billing, and Customer Experience to deliver scalable, compliant, and automated workflows.About the role:As a Senior Salesforce Engineer, you will take on a pivotal role as a hands-on technical leader, tasked with designing, building, and operating Salesforce solutions across Sales Cloud, Revenue Cloud/CPQ, and GTM integrations. You will tackle high-impact projects including post-acquisition system integrations, the implementation of a new usage-based billing platform, and enhancements within quoting, forecasting, and revenue operations. This role demands deep expertise in CPQ workflows while also overseeing broader platform architecture and integrations with finance and GTM systems. You will work cross-functionally with GTM, Finance, and IT leadership to create scalable, dependable solutions that position CoreWeave for continued success.

About Our TeamJoin the innovative Frontier Systems team at OpenAI, where we develop, deploy, and maintain some of the world’s largest supercomputers used for pioneering model training. Our expertise in transforming data center designs into fully operational systems enables us to build the necessary software to facilitate expansive frontier model trainings.Our mission is to establish, stabilize, and ensure the dependability and efficiency of these hyperscale supercomputers throughout the training of our advanced models.About This PositionAs a Software Engineer on the Frontier Systems team with a focus on power management, you will play a pivotal role in enhancing our groundbreaking research capabilities. Given the significant power demands of large-scale supercomputers, your expertise will be essential in optimizing power management to maximize computational efficiency. This role is vital for maintaining smooth operations within our cutting-edge research supercomputing framework, ensuring both reliability and grid-level power consistency.Our team fosters an environment that empowers talented engineers with substantial autonomy and ownership, allowing for impactful contributions. You will be challenged to conduct thorough system-level investigations and develop automated solutions, tackling complex issues with depth and precision while creating scalable automation for detection and remediation.Your Responsibilities Will Include:Design and implement both system-level and software-level solutions to optimize power consumption in large-scale supercomputers, ensuring efficient and reliable operations.Develop automation tools to monitor power consumption patterns during training workloads and create algorithms to stabilize these fluctuations, safeguarding grid reliability.Collaborate with researchers and engineers to create tools for real-time monitoring, detection, and resolution of power-related hardware and system issues.Work cross-functionally to translate complex electrical system requirements into executable code, driving ongoing enhancements in our power management strategies.Lead the creation of power throttling mechanisms at the IT system level, dynamically adjusting power usage based on workload demands and infrastructure constraints.Partner with hardware design teams to integrate system-level power control requirements into hardware design, ensuring seamless collaboration between software-driven power management and hardware functionalities.

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.

Join the dynamic team at the City and County of San Francisco as a Senior Information Systems Engineer specializing in Systems. In this pivotal role, you will leverage your expertise to enhance our technological infrastructure across multiple city departments, driving efficiency and innovation.Your responsibilities will include designing, implementing, and maintaining complex information systems while ensuring optimal performance and security. You will collaborate with diverse teams to identify system requirements and develop solutions that meet the needs of our community.