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 Us:At Aurelius Systems, we are a venture capital-backed defense technology startup committed to developing cutting-edge autonomous robotics systems that leverage directed energy for counter-UAS applications.Our mission is clear: we design laser weapon systems to neutralize drones.Our tight-knit team of approximately 10 engineers, ex-US military personnel, and industry experts is dedicated to enhancing America's capabilities in directed energy solutions. We pride ourselves on creating the first cost-effective, reliable, and robust laser weapon systems.The inspiration behind our name comes from Marcus Aurelius, who emphasized the importance of diligent effort and accountability in our work. We believe in taking initiative and pushing boundaries, much like Henry Ford did in revolutionizing manufacturing. Our culture thrives on high productivity and innovation.In addition to our laboratory and office in San Francisco, we have established a manufacturing hub in Detroit, and we conduct field tests weekly on our own 400-acre private range.If you are the type of engineer who prefers hands-on experiences over traditional lab settings, we encourage you to apply.Your Role & Impact:We are seeking an Electrical Engineer who is ready to take ownership of a diverse range of electromechanical hardware. Rather than focusing solely on one subsystem, you will engage with power, embedded control, wiring harnesses, and integration tasks—wherever the team requires support. This role will involve designing prototypes one day, managing harness pulls the next, and integrating subsystems on the range shortly after.This is not a limited position. It is a pivotal role within a small team that is building a weapon system from the ground up.Your Responsibilities Will Include:Designing high-voltage DC/DC converters, rectifiers, inverters, and diode driver electronics (48V+ systems)Architecting and validating battery management systems with a focus on safe charge/discharge, thermal management, and fault protection for high-voltage battery packsCreating ruggedized wire harnesses for high-power laser and motor systems (including connector selection, routing, and environmental protection)Leading hands-on prototyping, assembly, and field testing of power electronic systems at our rangeDesigning embedded control electronics such as microcontrollers, FPGAs, sensing, telemetry, and fault managementConducting electrical simulations (using SPICE, MATLAB/Simulink) to enhance performance prior to constructionPerforming DFM reviews and collaborating closely with fabricators to ensure design specifications are met

About Us:Aurelius Systems is an innovative, VC-backed defense technology startup that specializes in developing autonomous robotics systems deployed at the edge, utilizing directed energy for counter-UAS applications.Our mission is clear: we create laser weapon systems designed to neutralize drones effectively.Our dynamic team of approximately 10 engineers, former U.S. military personnel, and subject matter experts is dedicated to establishing America’s leadership in directed energy technology. We are on a mission to create the first cost-effective, reliable, and robust laser weapon systems.Inspired by the principles of Marcus Aurelius, we believe in tackling the challenges at hand every day, without excuses. Just as Henry Ford revolutionized manufacturing without waiting for permission, we embrace a culture of innovation and exceptional output, refusing to be limited by conventional constraints.In addition to our San Francisco lab and office, we operate a manufacturing hub in Detroit and conduct weekly field tests on our expansive 400-acre private range.If you're an engineer who thrives on seeing your innovations in action rather than confined to a lab, we encourage you to explore this opportunity.Your Role & Contributions:We are seeking a skilled Laser Engineer with hands-on experience in building fiber laser systems. You will take full ownership of the laser source, from fiber to beam, encompassing the design, construction, and field-testing of high-power fiber laser systems aimed at delivering energy effectively to targets.Your responsibilities will span the entire optical chain, including pump diodes, fiber combiners, gain fibers, and beam delivery optics, ensuring durability in real-world conditions.This role is not about theoretical research or maintaining existing systems; you will actively splice fiber, align optics, troubleshoot thermal issues in field conditions, and witness your systems in action, successfully neutralizing drones. The feedback loop between your workspace and the test range will be measured in days rather than weeks.Key Responsibilities:Design and construct high-power fiber laser systems including pump architectures, gain stages, and beam delivery optics.Conduct fusion splicing, fiber preparation, and connector termination for high-power fiber assemblies.Develop thermal management solutions such as heat sinking, active cooling, and thermal modeling to ensure beam quality during sustained operations.Enhance beam delivery and combining systems for optimal power-on-target performance.Select and integrate pump diodes, gain fibers (Yb, Er, Tm), fiber Bragg gratings, and passive optical components.

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 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.

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.

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 Us:Aurelius Systems is an innovative, VC-backed defense technology startup focused on developing autonomous robotics systems capable of utilizing directed energy for counter-unmanned aerial systems (UAS).Our mission is to create cutting-edge laser weapon systems designed to neutralize drones.Comprising a dedicated team of around 10 engineers, including former U.S. military operators and industry experts, we are committed to advancing America's directed energy capabilities with our reliable and robust laser weapon systems.Inspired by the principles of Marcus Aurelius, we adhere to a philosophy of relentless work ethic, much like Henry Ford's transformative approach to manufacturing. Our operational style emphasizes small teams delivering exceptional results without shying away from ambitious goals.With a lab and office in San Francisco and a manufacturing hub in Detroit, we conduct field tests weekly on our expansive, 400-acre private range.If you are an engineer who prefers practical applications of your work in real-world environments rather than confined lab settings, we invite you to continue reading.Your Role & Impact:As a Test Engineer, your primary responsibility will be to determine the functionality and performance of our systems across all layers. We are transitioning from prototype to production for an electromechanical directed energy system, and the test infrastructure you develop will serve as the cornerstone for our future products. You will be tasked with creating test benches from the ground up, ensuring they accurately simulate real-world conditions.You will lead the verification and validation processes for embedded firmware, power electronics, electromechanical assemblies, and full-system integration.Your work will directly influence every field test and demonstration, ensuring we arrive with a functional product.Your Responsibilities:Design and construct Hardware-in-the-Loop (HIL) and Software-in-the-Loop (SIL) test environments for embedded controllers, actuators, sensors, and power systems.Conduct performance, reliability, and safety testing at the system level, integrating hardware and firmware evaluations.Develop comprehensive test plans, acceptance criteria, and readiness gates as we progress from prototype to production.Write automated testing procedures in Python, creating your own regression suites without relying on external tooling.Oversee all aspects of field testing: setup, operation, data collection, teardown, post-test analysis, and documentation of failures.Debug across the entire stack of the system.

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 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.

Not a Generic Application:If your qualifications align with one of our active job openings, please apply directly there. Those listings are tailored for specific roles, ensuring a quicker evaluation process.This page is intended for talented individuals who may not find a specific role listed but feel they would thrive at Aurelius. We are compiling a shortlist of candidates for future opportunities, including internships and positions that may arise unexpectedly.Rest assured, every submission is thoroughly reviewed. You will be notified if your profile doesn't match our needs. If it does, expect to hear from us — it could be this month or in six months.About Us:Aurelius Systems is an innovative, venture capital-backed defense technology startup focused on developing autonomous robotics systems utilizing directed energy for counter-UAS applications.We specialize in creating laser systems designed to neutralize drones.Our compact team of around ten engineers, former military personnel, and industry specialists is dedicated to establishing the United States' leadership in directed energy technology. We aim to deliver the first cost-effective, dependable, and durable laser weapon system.Our ethos is inspired by Marcus Aurelius, who emphasized the importance of consistently tackling the task at hand without excuses. Much like Henry Ford revolutionized manufacturing without waiting for permission, we embrace a culture of high output from a small team, striving to achieve the remarkable without hiding behind the impossible.Alongside our San Francisco office and lab, we have established a manufacturing facility in Detroit and conduct weekly field tests on our 400-acre private range.

Join linqapp as a Systems Engineer and be a pivotal part of our innovative team in the heart of San Francisco. In this role, you will design, implement, and maintain systems that enhance our product offerings and drive efficiency. We are looking for a passionate engineer who thrives in a collaborative environment and is dedicated to delivering high-quality solutions.

Company Overview:Specter is revolutionizing how businesses perceive their physical environments by developing a software-defined control plane. Our mission is to enhance the security of American enterprises by providing them with comprehensive visibility over their physical assets.We are pioneering a connected hardware-software ecosystem that leverages multi-modal wireless mesh sensing technology, reducing the deployment costs and time for sensors by a factor of ten. Our platform aims to be the perception engine for a company’s physical presence, facilitating real-time visibility of perimeters and enabling autonomous operational management.Founded by passionate innovators from Anduril, Tesla, Uber, and the U.S. Special Forces, our co-founders, Xerxes and Philip, are dedicated to empowering our partners in the rapidly evolving landscape of physical AI and robotics.

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 braintrustBraintrust is at the forefront of AI observability. By merging evaluation and observability into a singular workflow, we empower developers with the insights needed to comprehend AI behavior in production environments, along with the tools to enhance it.Leading teams at Notion, Stripe, Zapier, Vercel, and Ramp utilize Braintrust to compare models, test prompts, and monitor regressions — transforming production data into superior AI with each new release.About the roleWe are in search of a passionate software engineer dedicated to crafting high-performance data processing systems. Our clientele consists of large enterprises handling complex, semi-structured data, which they require for real-time processing and analysis. Our distinct architecture enables these organizations to keep data on-premises while creating intricate visualizations that load without delay. Explore our Brainstore blog post.If you have experience with database systems, compilers, networks, or storage systems and aspire to pivot your expertise into the AI sector, this role could be your ideal fit. You will significantly influence foundational system architecture, technology selection, and implementation. Our founding team possesses extensive knowledge in database and ML systems, and you will have the autonomy to collaborate closely with them while exploring your innovative ideas.Your ResponsibilitiesAs a systems engineer at Braintrust, you’ll contribute to the core systems that empower Braintrust’s capability to process and query vast amounts of unstructured data at an enterprise scale. Key areas of responsibility include:Enhancing the storage, indexing, and query execution performance of Brainstore.Developing Braintrust's btql query language.Optimizing query patterns to boost performance across our platform.QualificationsDeep understanding of systems programming (C++ or Rust, concurrency, databases, operating systems).Experience in founding or working at startups is advantageous.Familiarity with writing prompts or experimenting with GPT models and applications.BenefitsComprehensive medical, dental, and vision insurance.Daily lunch, snacks, and beverages provided.Flexible time off policy.Competitive salary with equity options.

Midstream is an innovative, AI-driven financial operating system tailored for healthcare systems. Founded by a team of seasoned entrepreneurs and supported by prestigious investors, we empower finance, supply chain, and managed care teams with real-time insights into margin risks, enabling them to act swiftly to protect their margins.Designed specifically for the complexities of healthcare, Midstream converts structured, unstructured, and external data into immediate, contract-aware insights that enhance decision-making. Our AI-driven agents integrate spending and revenue operations across the entire back-office, continuously learning and adapting to ensure a level of intelligence that surpasses any standalone solution.We are revolutionizing the pace of healthcare finance, compressing lengthy processes into minutes and transforming retrospective insights into proactive foresight. Midstream is at the forefront of this change.The OpportunityJoin Midstream at a pivotal moment in our growth and contribute to establishing the technical backbone of our platform. In this role, you will operate at the intersection of product development, systems architecture, and cloud infrastructure, crafting and building distributed systems that enable our agile team to operate efficiently as we expand.You will collaborate closely with engineers and leadership to identify current infrastructural pain points and anticipate potential challenges before they arise. From multi-tenant architectures to security protocols, you will transform uncertainty into robust systems that minimize operational burdens and enhance engineering productivity.We are seeking a software engineer with a systems-oriented mindset who is passionate about long-term maintainability and developer experience, while also enjoying the process of creating backend services and delivering tangible software solutions. The ideal candidate will be adept at reasoning about distributed systems, making practical compromises, and developing infrastructure that seamlessly integrates into the background, allowing the team to focus on delivering impactful product value.What You’ll DoDevelop shared platform patterns and tools that enable engineers to launch new backend services and workflows efficiently, securely, and reliably.Enhance the reliability of our production systems by improving observability, debugging capabilities, and resilience as we scale.Architect infrastructure that is clean, reviewable, and repeatable, minimizing unique configurations and facilitating rapid iteration.Establish clear, scalable multi-tenant boundaries across data, compute, and identity to support...

Join our dynamic team at abridge as a Senior IT Systems Engineer. In this pivotal role, you will leverage your expertise to design, implement, and maintain robust IT systems that drive our business operations forward. Collaborate with cross-functional teams to innovate and enhance our technological infrastructure, ensuring seamless integration and optimal performance.

Astranis is revolutionizing satellite communication by designing and deploying cutting-edge satellites for high orbits, thereby enhancing humanity’s exploration of the solar system. Our state-of-the-art satellites deliver dedicated, secure networks to a diverse clientele, including major enterprises, government entities, and the US military. With five satellites in orbit and a robust pipeline of future launches, we are addressing over $1 billion in commercial contracts.As the preferred partner for satellite communications, Astranis meets the rigorous demands for uptime, data security, network visibility, and customization. Backed by over $750 million from esteemed investors such as Andreessen Horowitz, Blackrock, and Fidelity, our dynamic team of 450 engineers and entrepreneurs operates from our expansive 153,000 sq. ft. headquarters in Northern California.As an RF Systems Engineer, you will be pivotal in shaping our RF systems roadmap, evaluating trade-offs, incubating new technologies, and managing RF sub-systems budgets and requirements. You will model payload and TT&C systems for both commercial and USG satellites, taking ownership of your projects while collaborating across teams to innovate and advance satellite technology.

Lumafield develops X-Ray CT scanners designed to make advanced imaging more accessible and affordable. The company’s cloud software provides engineers with detailed visualization tools, helping them analyze complex products and make informed decisions. Role overview This full-time, on-site Hardware Systems Engineer position is based in San Francisco. The role centers on leading hardware development for industrial CT scanners. Collaboration with researchers and designers is a key part of the job, with a focus on improving product development for a range of industries. What you will do Lead hardware systems development for industrial CT scanners Design and manage electrical architecture Develop firmware and oversee system integration Work hands-on to transform concepts into working products Collaborate with cross-functional teams to address customer needs Team and collaboration The engineering team includes experienced researchers and designers who value curiosity and rigor. The group is impact-driven and backed by leading venture capital firms. Location This role requires working on-site at Lumafield’s San Francisco office.