Staff Software Engineer

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.

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.

About Wave HealthWave Health, a pioneering initiative by Treatment Technologies & Insights, Inc. (TTI), is dedicated to transforming the treatment experience for patients battling cancer and chronic illnesses. We specialize in creating bespoke software and mobile applications that empower patients to manage their treatment journeys and derive insights from their experiences with serious health conditions. Our ambitious plans for growth and enhancement of our infrastructure necessitate the expansion of our Engineering Team through ongoing partnerships and strategic initiatives.The RoleWe are on the lookout for a Junior Backend Engineer to become an integral part of our platform team. In this role, you will contribute significantly to the design and development of the APIs and services that drive the Wave Health platform.As a key member of a team focused on delivering core system functionality for other engineers to build upon, we need someone who is adept at solving complex technical challenges and is also passionate about promoting best practices throughout the team. We appreciate engineers who bring innovative ideas to the table and are committed to seeing problems through to resolution. A comfort level in a dynamic startup environment and experience in architecting sophisticated, production-grade healthcare systems is essential.

About the JobJoin Treatment Technologies & Insights, Inc. (TTI) as a Senior Backend Engineer within our dynamic platform team. Your expertise will be essential in designing and developing robust APIs and services that drive the Wave Health platform, aimed at enhancing treatment experiences for patients battling cancer and chronic illnesses.We are seeking a proactive engineer with a strong ability to solve complex technical challenges while actively promoting best practices across various teams. Your fresh ideas and problem ownership will be invaluable as we continue to evolve our infrastructure amidst ongoing partnerships and strategic growth. If you thrive in a fast-paced startup environment and possess a solid background in architecting complex, production-grade healthcare systems, we want to hear from you!

About UsAt Picogrid, we are at the forefront of defense technology, committed to bridging the gap between cutting-edge technology and the pressing needs of national security. Our innovative infrastructure seamlessly integrates sensors, autonomy, and operators, with our solutions actively deployed in military operations globally. Our mission is to provide a tactical edge to protect the United States and its allies.Role OverviewWe are looking for a talented Senior Software Engineer to join our dynamic Legion Platform team. In this role, you will design, develop, and implement high-performance backend systems and integration tools that connect hardware and software across diverse environments and command levels. Your expertise will play a pivotal role in addressing complex system-level challenges and enhancing a resilient platform that supports real-world military operations. This position demands continuous innovation and is ideal for an engineer who excels under pressure and seeks to make an immediate impact on national security.

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.

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.

Join VardaSpace as a Structures Engineer, where you will be at the forefront of innovative aerospace engineering solutions. You will work on the design, analysis, and testing of structural components for our cutting-edge spacecraft, contributing to projects that aim to revolutionize the space industry.

About Varda Space Industries Low Earth orbit is open for business. Varda Space Industries develops commercial space infrastructure, with a focus on in-orbit pharmaceutical manufacturing and affordable reentry capsules. Space offers unique opportunities, from producing life-saving medicines to creating advanced fiber optics that can only be made in orbit. Varda’s mission is to build the products and infrastructure that connect space innovation directly to life on Earth, expanding economic possibilities for humanity. The team brings experience from SpaceX, Blue Origin, top pharmaceutical companies, and Silicon Valley. Varda was founded in January 2021 by Will Bruey and Delian Asparouhov, and is backed by investors including Khosla Ventures, Lux Capital, Founders Fund, Caffeinated Capital, General Catalyst, and Also Capital. Headquartered in El Segundo, California, Varda operates a production facility for developing, integrating, and testing vehicles, equipment, and materials. Additional offices are located in Washington, DC, and Huntsville, Alabama. Varda is building the foundation for a thriving in-space ecosystem.

Senior Manufacturing EngineerJoin Radiant Industries as a Senior Manufacturing Engineer, where you will collaborate with design engineers to revolutionize the production of intricate mechanisms and structures essential to our innovative microreactor technology. Your role will be critical in ensuring the reliability, safety, quality, and timely delivery of the Kaleidos demonstration unit, set for testing at the Idaho National Lab in 2026—marking the first new reactor design in over 50 years.Key Responsibilities:Oversee the manufacturing and inspection processes of vital components and assemblies within the Kaleidos microreactor.Collaborate with design engineers to create innovative production methods for complex mechanisms and structures.Develop, validate, and optimize manufacturing processes to fulfill all design and business requirements, including safety, quality, efficiency, and delivery timelines.Formulate and implement manufacturing specifications and fabrication instructions.Manage the manufacturing bill of materials (mBOM) for components and assemblies.Identify, evaluate, and establish partnerships with suppliers for component sourcing and fabrication.Identify, plan, and execute upgrades to capital equipment, machinery, and layout to adapt to evolving production needs.Lead initiatives that promote continuous improvements in manufacturing processes and product quality.

Role OverviewRadiant Industries is on the lookout for a skilled Loads & Dynamics Engineer to lead and conduct structural loads, vibration, and dynamic analyses for intricate mechanical systems associated with Kaleidos, the world's first portable microreactor and its supporting hardware. In this pivotal role, you will ensure the structural integrity and durability throughout the product lifecycle, covering all aspects from manufacturing to deployment and operational environments.This position requires a proactive engineer who thrives in fast-paced, ambiguous settings and collaborates effectively with teams in structures, mechanical design, thermal, nuclear, and testing disciplines.Key ResponsibilitiesDevelop and manage static, dynamic, and transient load analysis for reactor systems, support structures, and transport configurations.Conduct structural dynamics analyses, including modal, random vibration, shock, sine vibration, and fatigue assessments.Implement explicit dynamics simulations to model nonlinear reactor responses during transient seismic and transportation events.Define and analyze transportation and handling environments, addressing shock and vibration from road, rail, air, or sea transport.Generate load cases and environments to support structural sizing, design margins, and verification plans.Conduct finite element analyses (FEA) using tools such as ANSYS and Abaqus.Work collaboratively with design engineers to influence hardware architecture, material selection, and joint design.Assist in test planning and correlation, including shaker tests, modal surveys, and structural verification testing.Create and maintain analysis documentation, reports, and requirements for internal reviews and regulatory interfaces.Contribute to failure investigations, root cause analyses, and design enhancements.Help establish best practices for loads, dynamics, and structural verification within a growing engineering organization.

Join CX2, a pioneering defense technology firm dedicated to achieving spectrum superiority for the United States and its allies. Our cutting-edge, AI-integrated hardware and software solutions are designed to detect, disrupt, and safeguard the electromagnetic spectrum across land, air, sea, and space.We are currently on the lookout for a proactive Hardware Test Engineer to spearhead the development and execution of testing protocols for our hardware products in a dynamic manufacturing setting. In this role, you will be instrumental in validating product performance, reliability, and compliance by designing test procedures, fixtures, and automated testing systems. This position will support both new product introductions (NPI) and high-volume production efforts at our headquarters in El Segundo, CA.

Role overview Radiant Industries is hiring a Principal Turbomachinery Engineer to act as the Responsible Engineer for advanced turbomachinery within a nuclear-driven power generation system. The focus is on the mechanical design, reliability, and performance of the main rotating assembly in a 1MW closed-loop Brayton cycle. This position requires deep technical ownership of complex, high-speed rotating equipment. What you will do Lead the mechanical architecture for high-speed rotating equipment that operates under extreme temperatures, pressures, and rotational speeds. Guide technical work in rotor dynamics, structural integrity, bearings, seals, and system integration. Collaborate with electrical, thermal, and manufacturing teams to ensure integration across disciplines. Maintain end-to-end responsibility from concept through production, emphasizing technical rigor and sound engineering judgment. Requirements Extensive experience designing and analyzing turbomachinery, with a focus on high-speed rotating hardware. Strong knowledge of rotor dynamics, structural assessment, bearing and seal selection, and system-level integration. Hands-on approach with a track record of delivering production-ready hardware. Ability to work effectively with specialists in electrical, thermal, and manufacturing engineering. Location This position is based in El Segundo, CA.

Join cx2 as an FPGA Engineer, where you will design, develop, and implement advanced FPGA solutions for cutting-edge applications. You will collaborate with a dynamic team of engineers and contribute to innovative projects that push the boundaries of technology.

Join VardaSpace as a Senior Structures Engineer and be at the forefront of innovative aerospace solutions. In this pivotal role, you will lead the design and analysis of structural components for space vehicles, ensuring safety and performance in the demanding environment of space. You will collaborate with a passionate team of engineers and contribute to groundbreaking projects that push the boundaries of technology.

About VardaPioneering the Future of Low Earth Orbit. Varda is at the forefront of developing commercial space infrastructure, ranging from in-orbit pharmaceutical production to efficient and cost-effective reentry capsules.Our innovations include a variety of products, from life-saving pharmaceuticals to advanced fiber optics, all of which can only be developed in space. Varda is committed to driving progress in the orbital economy by establishing the necessary products and infrastructure to ensure that space can directly enhance life on Earth. Our mission is to expand the economic horizons of humanity.Our exceptional team is composed of veterans from SpaceX, Blue Origin, and major pharmaceutical firms, along with experts from Silicon Valley. Founded in January 2021 by Will Bruey and Delian Asparouhov, Varda has garnered significant support from prestigious investors, including Khosla Ventures, Lux Capital, Founders Fund, Caffeinated Capital, General Catalyst, and Also Capital.Headquartered in El Segundo, California, we operate a production facility where our vehicles, equipment, and materials are designed, integrated, and tested. Additionally, we have offices in Washington, DC, and Huntsville, AL.Join Varda and contribute to building a thriving ecosystem in space.About This RoleThe Thermal Engineer will be responsible for conducting thermal analysis and ensuring optimal thermal performance of our spacecraft systems.

Join Picogrid as a Chief Hardware Engineer, where you'll lead the development of cutting-edge hardware solutions. You will be responsible for overseeing the design, prototyping, and testing of innovative hardware products, ensuring they meet both performance and quality standards. Collaborate with cross-functional teams to bring your vision to life while driving strategic initiatives that enhance our technology offerings.

Join Our Team as a Reactor Operations EngineerRadiant Industries is on the lookout for a skilled Reactor Operations Engineer to develop and implement essential procedures for our innovative nuclear microreactor technology. This position presents an extraordinary chance to merge engineering, operations, and human factors in a highly technical and regulated setting. You will work alongside a diverse team to transform intricate hardware and software designs into clear, actionable procedures that comply with DOE and NRC standards. Your efforts will empower Reactor Operators (ROs) and Senior Reactor Operators (SROs) to efficiently and safely conduct testing, commissioning, and operational activities.This role transcends traditional systems engineering; you'll also gain practical experience as a Reactor Operator (RO), directly shaping the development of operational software, procedures, and digital twin simulations. Your contributions will play a vital role in enhancing operator efficiency, safety, and the real-world execution of our state-of-the-art microreactors.