Lead Software Engineer

About Radiant IndustriesRadiant Industries, headquartered in El Segundo, CA, is pioneering the development of the world’s first mass-produced, portable nuclear microreactors. Our flagship product, Kaleidos, is a revolutionary 1-megawatt microreactor designed for transportability and can operate continuously for up to five years without the need for refueling. This innovative solution aims to replace conventional diesel generators, providing essential energy support for hospitals, data centers, remote locations, and military bases. We leverage cutting-edge software engineering practices to deliver safe, factory-built microreactors utilizing established, high-quality materials. Established in 2020, Radiant Industries is gearing up to test its inaugural reactor at the Idaho National Laboratory next year, with initial customer deliveries set to commence in 2028.Position OverviewWe are looking for an accomplished Technical Lead DevOps Engineer to spearhead our software infrastructure, deployment, and automation initiatives. In this pivotal role, you will collaborate with teams across the organization, working closely with the software development team to design scalable, secure, and resilient DevOps practices, tools, and systems. The infrastructure you oversee, the pipelines you construct, and the analytical tools you develop will be integral to the design, operation, and analysis of our groundbreaking reactor, which represents a major advancement in nuclear technology over the past 50 years. This is a unique opportunity to establish a robust foundation for our production environment.Key Responsibilities:Architect, implement, and maintain infrastructure across AWS and on-premises Linux environments, ensuring high availability, security, and optimal performance for mission-critical systems.Oversee and enhance Kubernetes and Docker container orchestration to efficiently execute simulations, internal tools, and engineering applications at scale.Design, build, and optimize CI/CD pipelines using Git, Argo, and other automation tools to facilitate rapid and reliable software delivery across engineering teams.Develop internal tools that enhance build systems, testing frameworks, deployment automation, and developer environments.Create computational analysis tools for our digital twin platform, implementing automated profiling and monitoring to optimize high-performance computing workloads for reactor modeling.Implement and manage infrastructure-as-code practices using Terraform or similar tools to ensure reproducible, version-controlled infrastructure deployments.Establish and maintain observability, monitoring, and logging infrastructure to guarantee system reliability and performance.

Join our dynamic team at Sonsoft Inc. as a DevOps Engineer. In this pivotal role, you will collaborate with cross-functional teams to enhance our deployment pipelines, automate processes, and ensure the reliability of our infrastructure. Your expertise in cloud services, scripting, and container orchestration will help us deliver high-quality software solutions efficiently.If you are passionate about optimizing systems and thrive in a fast-paced environment, we want to hear from you!

Picogrid seeks a Staff Software Engineer based in El Segundo, CA. This position plays a central role in shaping the software systems that power Picogrid’s products. The engineer will work side by side with fellow engineers to ensure these systems evolve to meet changing customer needs. Key responsibilities Design and implement software systems that support Picogrid’s products Work with other engineers to address complex technical problems Improve and optimize existing systems for better performance and reliability Collaboration This role involves close teamwork with the engineering group. Expect to contribute ideas and solutions as part of a group focused on building adaptable, reliable software.

Join our dynamic team at usm2 as a DevOps Engineer! We are seeking a talented individual who is ready to tackle challenging projects and optimize our operations.

We are seeking a highly skilled DevOps Engineer to join our dynamic team at usm2. This is a contract position aimed at individuals who are Green Card holders and are ready to contribute their expertise in a fast-paced environment.In this role, you will be responsible for implementing and managing cloud infrastructure, automating deployment processes, and enhancing the overall efficiency of our operations. If you are passionate about DevOps practices and have a strong background in cloud technologies, we want to hear from you!

At Sift, we are revolutionizing the way modern machines are constructed, tested, and operated. Our platform empowers engineers with real-time observability over high-frequency telemetry, eliminating bottlenecks and facilitating faster, more dependable development.Sift emerged from our collaborative efforts at SpaceX on projects such as Dragon, Falcon, Starlink, and Starship—where scaling telemetry, debugging flight systems, and ensuring mission reliability necessitated innovative infrastructure. Founded by a team with backgrounds at SpaceX, Google, and Palantir, Sift is engineered for mission-critical systems where precision and scalability are imperative.As an early engineer focused on our data infrastructure, you will play a pivotal role in defining core architecture while helping to scale a real-time telemetry platform from its inception. You will engage in developing complex backend systems aimed at ingesting, storing, and serving millions of high-frequency data points per second, thus enabling rapid iteration cycles for some of the world's leading engineering teams.

Radiant Industries is on the lookout for a Lead Electrical Motor Design Engineer to spearhead the architecture, technical direction, and implementation of high-speed alternators and primary loop motors for our cutting-edge nuclear-driven power generation systems. This pivotal role will oversee the electric machine design function that is essential for the commercialization of the world's first mass-produced nuclear reactors.In this position, you will establish a technical vision for motor design while steering efforts in structural, thermal, and system integration. As a player-coach, you will actively engage in design work while mentoring a team of engineers to ensure the delivery of safe, reliable, and production-ready generator systems.This hands-on technical leadership position comes with substantial cross-functional impact.

Lead Nuclear EngineerRadiant Industries is on the lookout for a dynamic and technically proficient leader to head our nuclear design and analysis team, specializing in core physics, shielding, instrumentation & controls, and reactor operations. In this pivotal role, you will guide a talented team through the intricate design, development, and testing phases of the innovative Kaleidos microreactor project. You will be responsible for managing schedules, budgets, hiring, and the successful execution of nuclear-related objectives, with a strong emphasis on safety, reliability, portability, and performance. The ideal candidate thrives in interdisciplinary settings, collaborates effectively with engineers and leadership, possesses a deep understanding of engineering principles, excels in creative problem-solving, and is passionate about mentoring and inspiring engineers to achieve their best work. Join us in our mission to bring the first portable nuclear microreactor to market.Key Responsibilities:Lead a multidisciplinary team of nuclear engineers focused on safety analyses, core performance, shielding—including operational dose, activation, shutdown dose—instrumentation & controls, operations, and thermal-hydraulics.Recruit, mentor, and develop a high-performing team of nuclear engineers.Oversee nuclear engineering projects from inception to completion, including requirements gathering, iterative design, simulation pipeline development, and regulatory deliverables.Collaborate with the regulatory team to ensure compliance with nuclear industry standards and requirements.Provide mentorship to engineers through constructive feedback and coaching.

Join Radiant Industries as a Lead Test Engineer for Power Generation Systems, where you will spearhead the strategy and execution of testing for our innovative power generation systems, encompassing turbomachinery, heat exchangers, controls, and primary cooling systems. This position is perfect for a hands-on technical leader who takes pride in developing test infrastructures, managing complex hardware operations, and mentoring engineering talent while being actively engaged in daily testing activities.In this role, you will take charge of the testing development for our high-speed machinery and build our testing facilities from the ground up. These infrastructures will be pivotal for rapid design iterations, focusing on evaluating vibration, performance, thermal behavior, and system reliability, ultimately facilitating a smooth transition into production acceptance testing. You will collaborate closely with mechanical design, analysis, manufacturing, and operations teams to validate and ensure that turbomachinery designs meet production standards.

At Sift, we are transforming the way modern machines are designed, tested, and operated. Our cutting-edge platform offers engineers real-time observability over high-frequency telemetry, effectively removing bottlenecks and facilitating faster, more reliable development.Sift originated from our efforts at SpaceX, where we worked on projects like Dragon, Falcon, Starlink, and Starship. These experiences highlighted the necessity for scalable telemetry, robust debugging of flight systems, and unwavering mission reliability, leading to the creation of innovative infrastructure. Founded by a team with backgrounds from SpaceX, Google, and Palantir, Sift is tailored for mission-critical systems where precision and scalability are paramount.As an early engineer at Sift, your role will extend beyond mere code writing; you'll be instrumental in defining architecture, shaping product development, and influencing a culture dedicated to addressing genuine engineering challenges. If you are eager to tackle complex technical problems and contribute to foundational systems that support intricate machines from the ground up, we encourage you to apply.In This Role, You'll:Design, develop, and uphold scalable, resilient infrastructure solutions that cater to our expanding platform and clientele.Collaborate closely with software engineers to enhance application performance and reliability.Establish monitoring, alerting, and logging frameworks to proactively identify and resolve issues.Automate deployment processes and refine infrastructure management using advanced DevOps tools and methodologies.Advance our backend architecture and infrastructure for both cloud and on-premise deployments.Collaborate with the team to set and prioritize our roadmap for maximum customer impact.Lead efforts to enhance infrastructure reliability, performance, and cost efficiency.

At Sift, we are pioneering the future of infrastructure for modern machines, transforming the way they are constructed, tested, and managed. Our innovative platform offers engineers unparalleled real-time observability over high-frequency telemetry, effectively eliminating bottlenecks and facilitating rapid, dependable development.Originating from our groundbreaking work at SpaceX on projects like Dragon, Falcon, Starlink, and Starship, Sift emerged from the need for advanced infrastructure to accommodate complex telemetry, debug flight systems, and ensure mission reliability. Our founding team, with expertise from SpaceX, Google, and Palantir, crafts solutions for mission-critical systems where precision and scalability are paramount.As a pivotal member of our engineering team, you will not only write code but also play a significant role in shaping the architecture, product direction, and culture of a company dedicated to addressing real engineering challenges. If you thrive on tackling intricate technical problems and aspire to build foundational systems that support complex machinery, we encourage you to apply.

At Sift, we are transforming the landscape of modern engineering by redefining how machines are constructed, tested, and operated. Our innovative platform empowers engineers with real-time insights into high-frequency telemetry data, effectively eliminating bottlenecks and accelerating the development process.Sift originated from our groundbreaking work at SpaceX on projects such as Dragon, Falcon, Starlink, and Starship, where the need for scalable telemetry, robust debugging of flight systems, and unwavering mission reliability necessitated the creation of new infrastructure. Founded by a distinguished team hailing from SpaceX, Google, and Palantir, Sift is designed for mission-critical systems where precision and scalability are paramount.As a key member of our engineering team, you will play a pivotal role in shaping our data infrastructure. You won't merely be coding; you'll be instrumental in defining the core architecture and scaling our real-time telemetry platform from the ground up. You will tackle challenging backend systems tasked with ingesting, storing, and serving millions of high-frequency data points per second, facilitating rapid iteration cycles for some of the world's most advanced engineering teams.

About Matter IntelligenceMatter Intelligence is at the forefront of developing cutting-edge airborne and spaceborne sensing systems that integrate precision optics, innovative thermal architectures, spacecraft engineering, and AI-enhanced data analysis. Our advanced systems function effectively in challenging orbital and airborne environments, unlocking new possibilities for Earth observation capabilities.With a proven track record of delivering technologies to Mars for NASA/JPL, designing advanced sensors for U.S. defense, and establishing core infrastructure at OpenAI, our team is now focused on creating the next generation of sensing systems for both space and airborne applications.About the RoleWe are looking for a Senior Thermal Engineer who will take charge of the thermal architecture, analysis, and verification of our precision optical payloads and spacecraft systems. This role encompasses ownership of thermal performance from the initial concept stage through integration, testing, and, where applicable, on-orbit operations.You will be responsible for developing and maintaining intricate thermal models, steering thermal trade studies, supporting STOP performance, and collaborating closely with systems, optomechanical, electronics, and AI & T teams to ensure that flight hardware meets all performance requirements throughout every mission phase.This is a hands-on, analytical, and leadership-focused role suited for an engineer seeking significant technical ownership over hardware that operates in flight.Key ResponsibilitiesThermal Architecture & DesignDefine and lead the thermal architecture for optical payloads and spacecraft subsystems.Design both passive and active thermal control solutions, including radiators, heat pipes, thermal straps, insulation, and cryogenic interfaces.Translate mission-level thermal requirements into subsystem- and component-level designs.Support thermal trades to effectively balance performance, mass, power, and complexity.Thermal Modeling & AnalysisDevelop, maintain, and correlate detailed thermal models using industry-standard tools (e.g., Thermal Desktop, SINDA/FLUINT).Conduct steady-state and transient thermal analyses across all mission phases (launch, ascent, on-orbit hot/cold cases, safe modes).Perform in-depth thermal analysis of precision optical elements (mirrors, mounts, focal plane assemblies), including thermo-elastic distortion.Execute thermal assessments at the circuit card and chassis level.

Varda Space Industries builds commercial space infrastructure, including in-orbit pharmaceutical manufacturing and reentry capsules designed for cost efficiency. The company specializes in products enabled by microgravity, such as advanced fiber optics and pharmaceuticals, aiming to bring the benefits of space manufacturing to people on Earth. Founded in 2021 by Will Bruey and Delian Asparouhov, Varda’s team draws on backgrounds from SpaceX, Blue Origin, major pharmaceutical firms, and Silicon Valley. The company is supported by Khosla Ventures, Lux Capital, and Founders Fund. Headquarters and production are based in El Segundo, California, with offices in Washington, DC, and Huntsville, Alabama. Role overview The Lead Principal Mechanisms Engineer for Payloads leads the design and development of complex electromechanical flight hardware. This hardware must operate reliably in orbit, withstand hypersonic reentry, and return to Earth for further analysis and development. This position shapes the payload architecture for missions focused on pharmaceutical manufacturing and hypersonic reentry testbeds. The engineer guides projects from initial concept through detailed design, ensuring mission requirements are met throughout each stage.

About the RoleJoin our dynamic team at Radiant Industries, where we are committed to revolutionizing our internal data infrastructure, executive analytics, and AI capabilities. As a Staff Data Platform Engineer, you will play a pivotal role in constructing the integrations and pipelines that seamlessly connect our operational systems—Finance, HR, Supply Chain, Manufacturing, and Recruiting—into a cohesive data platform.Your first focus will be the ION-Ramp integration, where you'll build the essential pipeline that facilitates three-way matching (PO + Receipt + Invoice) between our manufacturing execution system and payments platform, significantly reducing manual workloads for our Finance team. From there, you'll extend your efforts to connect nine enterprise systems, create dbt transformation models, and uphold data quality across the platform.What You'll DoBuild Integrations: Configure Fivetran connectors, develop custom pipelines, and link nine enterprise systems (ION, Ramp, QuickBooks, Rippling, Ashby, Salesforce, SharePoint, Smartsheet, DocuSign).Develop the ION-Ramp Pipeline: Construct the Snowflake → Databricks → Ramp pipeline that enables three-way matching for Finance.Write dbt Models: Transform raw data into clean, documented, tested models for dashboards and analytics.Ensure Data Quality: Implement testing, monitoring, and alerting for data pipelines; proactively identify issues before they affect dashboards.Support Dashboards: Collaborate with the PM and stakeholders to ensure data models effectively support Finance, Operations, and HR/Recruiting dashboards.Document Everything: Maintain comprehensive documentation for pipelines, models, and data definitions.

About UsAt Picogrid, we are at the forefront of defense technology, committed to addressing the critical intersection of modern innovation and national security needs. Our mission is to create a cohesive infrastructure that integrates sensors, autonomy, and operational forces, empowering the United States and its allies with enhanced capabilities in active deployments worldwide.Position OverviewWe are seeking a dynamic Chief of Staff to collaborate closely with our Co-Founder & Head of Growth in steering pivotal initiatives across our sales and operational frameworks. This role positions you at the heart of our essential business decisions, facilitating the growth of our go-to-market organization while maintaining our momentum.The ideal candidate thrives in fast-paced environments, possesses exceptional problem-solving skills, approaches challenges with a first-principles mindset, and values teamwork. This position is tailored for an 'operator' who can fluidly navigate between strategic oversight and hands-on execution.Key ResponsibilitiesCollaborate with the Co-Founder / Head of Growth to strategize, prioritize, and implement critical initiatives across the go-to-market landscape.Lead and coordinate cross-functional projects involving engineering, operations, and government partners.Address immediate project management and scheduling needs, stepping in as the '0-to-1' lead for new customer engagements.Facilitate executive decision-making through comprehensive analysis, data insights, and robust operational practices.Experiment with and refine new go-to-market strategies, developing systems that enable our sales team to expand effectively.Oversee essential communications, including board materials, executive updates, proposals, and strategic documentation.QualificationsProven experience in a high-growth startup, management consulting (MBB), or investment banking.Outstanding analytical, written, and verbal communication abilities, including experience in crafting executive-level documents and presentations.Demonstrated success in managing cross-functional projects under tight deadlines.High level of discretion and sound judgment in handling sensitive information.

About Radiant IndustriesRadiant Industries, headquartered in El Segundo, California, is at the forefront of innovation in the energy sector, pioneering the development of the world's first mass-produced portable nuclear microreactors. Our flagship reactor, Kaleidos, is a groundbreaking 1-megawatt, fail-safe microreactor designed for mobility and can operate for up to five years without needing refueling. This revolutionary portable nuclear power solution offers rapid deployment capabilities, making it a viable alternative to conventional diesel generators, with applications in supporting critical infrastructure such as hospitals, data centers, remote locations, and military installations. Founded in 2020, we are committed to leveraging modern software engineering techniques to deliver safe, factory-built microreactors, utilizing well-established materials. With an ambitious roadmap, we aim to test our first reactor at the Idaho National Laboratory next year and commence initial customer deliveries in 2028.Join Our Team as a Principal FPGA EngineerWe are seeking a passionate and skilled Principal FPGA Engineer to become an integral part of our Embedded Systems team. In this role, you will design, develop, and validate FPGAs for the reactor's instrumentation and control systems, focusing on safety-critical applications, sensor and actuator management, and communication systems. You will collaborate closely with hardware engineers, embedded software engineers, and test engineers in a cross-functional environment to create cohesive designs that effectively monitor and control fission reactors. As a key contributor, you will play a vital role in testing the first commercial reactor design in over half a century.This position is full-time and based onsite in El Segundo, CA.

Radiant Industries designs portable nuclear microreactors in El Segundo, CA. The company's flagship product, Kaleidos, is a 1-megawatt microreactor intended for easy transport and long-term power delivery, up to five years without refueling. Kaleidos aims to serve hospitals, data centers, remote operations, and military sites as a cleaner alternative to diesel generators. Radiant was founded in 2020 and plans to test its first reactor at Idaho National Laboratory this summer, with initial customer shipments scheduled for 2028. Role overview This Lead Principal Electrical Engineer role centers on PCB design for terrestrial reactor control systems, with future potential for space-based applications. The position requires a technical leader to define electrical architecture, set design standards, and guide the complete development cycle for high-reliability, low-noise printed circuit boards. Work includes requirements gathering, schematic capture, layout, validation, and deployment. What you will do Lead electrical architecture for reactor control systems Establish and maintain design standards for PCB development Drive architectural decisions for mixed-signal, high-speed, and power distribution designs Oversee the full development process of printed circuit boards, from requirements through deployment Prioritize signal integrity and low-noise performance for data acquisition and real-time processing Mentor and support other electrical engineers on the team Contribute to the technical direction of Radiant’s hardware platform Key focus areas Full-stack PCB development Mixed-signal circuit design High-speed interface design Power distribution and management Signal integrity for critical control systems

About UsPicogrid is a pioneering venture-backed defense technology firm dedicated to bridging the long-standing gap between cutting-edge technology and the pressing needs of national security. Our commitment is to establish vital infrastructure that integrates sensors, autonomy, and operators, with our technology already in active deployment across global operations. Our mission is to provide an operational edge to safeguard the United States and its allies.Role OverviewWe are seeking a proactive Frontend Tech Lead to take ownership of the Orion frontend, focusing on base defense and fleet management solutions built on the Legion platform. This high-stakes, autonomous position will enable you to design a real-time geospatial user interface that seamlessly incorporates live video feeds, maps, and controls for intricate defense systems. As the principal technical steward for Orion’s frontend, you will collaborate closely with product managers, designers, and customers to transform vague requirements into deliverable products. While the role is predominantly frontend-focused (React / TypeScript), you should also be prepared to engage with backend technologies as necessary.