Hardware-in-the-Loop Software Engineer

Observable Space is at the forefront of transforming space operations, providing essential tools for organizations to thrive beyond Earth. Our innovative approach combines advanced telescope design with a suite of integrated hardware and software solutions, enabling continuous, real-time observations of outer space. We cater to various sectors including commercial, scientific, educational, and governmental clients, as well as passionate astronomers eager to explore the cosmos.Supported by leading institutional investors such as Upfront Ventures and Oceans Ventures, we are poised for significant growth and impact in the space industry.Role OverviewAs a Senior Test Engineer specializing in hardware-in-the-loop (HITL) systems, you will play a crucial role in validating the performance and reliability of our cutting-edge products, from robotic telescopes to future space platforms. You will be responsible for designing, constructing, and operating HITL test systems, ensuring our hardware and software systems integrate seamlessly.This hands-on role requires close collaboration with hardware, software, and systems engineering teams, as you develop automated test frameworks, simulate real-world conditions, and troubleshoot complex challenges across multiple domains.

At Apex Technology Inc., we are shaping the future of aerospace with our innovative spacecraft solutions. As the demand for satellite buses surges due to the increasing number of payload companies and decreasing launch costs, we are at the forefront of this exciting evolution.Our satellite buses are meticulously engineered to support various payloads, enabling advancements in areas such as Earth observation and communication. We pride ourselves on our ability to manufacture these platforms at scale, leveraging advanced software, vertical integration, and purpose-built hardware.Join our mission to provide humanity with unprecedented access to the cosmos, and be part of a team that is dedicated to innovation and excellence in aerospace technology.Role OverviewAs a Hardware-in-the-Loop (HITL) Engineer, you will spearhead the development and execution of rigorous testing strategies aimed at validating the performance, functionality, and reliability of our satellite systems. You will collaborate with a diverse team of engineers and technicians to craft realistic test environments utilizing state-of-the-art simulation and emulation tools. Your precision and analytical skills will be vital in ensuring the successful deployment of our satellite systems.

Join AnySignal, a pioneering startup dedicated to revolutionizing RF (Radio Frequency) products and services for the most critical space and defense applications. Our cutting-edge platform guarantees top-tier performance that is user-friendly in terms of deployment, monitoring, purchasing, and upgrading.Our diverse team is composed of experts spanning various fields, including cloud computing, artificial intelligence, communications, sensing technologies, embedded systems, and more.As a Senior RF Hardware Engineer, you will take ownership of the design, manufacturing, testing, and deployment of sophisticated RF devices that cater to a wide array of space customers. Collaborating closely with a compact team of software, hardware, and FPGA engineers, you will guide our products from initial design to successful vehicle integration, employing a holistic approach to develop resilient space communication systems.

Rebuild Manufacturing is building an AI-powered platform to improve hardware product development. The platform connects with tools that hardware teams already use, helping them track change requests and share important context. By coordinating across different disciplines, it keeps projects moving smoothly as requirements shift. Supported by a parent company with deep roots in engineering and manufacturing, the team is focused on closing communication gaps in hardware development. The goal: make sure every update and decision reaches the right people at the right time. Role overview The Senior AI Engineer will design and build the core AI agents that drive the platform. This work involves developing systems that can spot potential issues in hardware workflows, offer timely assistance, and help teams stay aligned as projects evolve. What you will do Create AI systems that integrate with existing engineering tools Develop features to coordinate change requests and share critical information Build solutions that help engineering teams anticipate and resolve workflow challenges Locations Greater Boston, MA Los Angeles, CA United States (other locations considered)

Join Freeform Future Corp as a Senior Electrical Engineer specializing in hardware design, where you will play a pivotal role in developing innovative solutions that shape the future of technology. In this position, you will be responsible for designing, developing, and testing electrical hardware components and systems. Collaborate with a talented team of engineers and contribute to exciting projects that push the boundaries of what's possible.

Join Reddit's Quality Engineering team as a Senior Software Engineer specializing in Android Test Engineering. In this role, you'll collaborate with cross-functional teams to create and enhance testing frameworks and tools that uphold the highest quality standards across our development processes. Your contributions will play a vital role in ensuring that all engineering teams at Reddit are equipped with the resources they need to deliver exceptional software experiences to our users.

Join Hadrian Automation as a Senior Test Engineer and play a crucial role in the evolution of manufacturing for aerospace and defense. You will be responsible for planning and executing a variety of test activities across mechanical, electrical, and integrated systems throughout the product lifecycle. Your hands-on expertise will support development, qualification, and production efforts, while collaborating with design, manufacturing, quality, and operations teams to ensure robust and reliable systems ready for production. This position emphasizes rigorous testing, contributing to system performance, scalability, and quality.

Join Apex Technology Inc. as an Avionics Hardware Development Engineer, where you will play a vital role in advancing our innovative aerospace solutions. You will be responsible for designing, developing, and testing avionics hardware systems that meet rigorous industry standards. Collaborate with a talented team of engineers to ensure the reliability and performance of our products.

Join k2spacecorporation as a Senior EMI/EMC Test Engineer, where you will play a critical role in ensuring the electromagnetic compatibility of our innovative products. You will be responsible for designing and executing rigorous test plans, analyzing results, and collaborating with cross-functional teams to resolve compliance issues.

About UsAntares is on a visionary journey to revolutionize clean energy accessibility, extending from Earth to the Asteroid Belt. We believe that cutting-edge nuclear energy can bolster military strength, mitigate climate challenges, enhance global living standards, and facilitate humanity's exploration of outer space. Our mission involves the development of safe, mass-producible microreactors designed for terrestrial, underwater, and space applications.Founded in 2023, our team comprises experts from prestigious organizations such as SpaceX, The White House, MIT, and various national laboratories. With over $130 million in venture capital and significant government funding, we are poised to make a significant impact in the energy sector.About the RoleAs a Test Engineer within the Antares Mission Engineering team, you will be responsible for designing and implementing test infrastructure for our R1 microreactor. This role encompasses creating comprehensive test plans that cover everything from concept development to data analysis for critical components and subsystems, including heat rejection, power distribution, thermal management, and mechanical systems.You will contribute to the formulation and documentation of testing best practices, requirements, and workflows that support rapid iterations and high-quality data collection. Collaboration with cross-functional teams will be essential to ensure that prototype, development, and qualification hardware aligns with test plans validating key features and performance metrics. This position also requires you to design, validate, and maintain test setups that ensure precision and accuracy.

At Amca, we're redefining the future of aviation by developing state-of-the-art aircraft technology for the 21st century. Our mission is to revolutionize the aerospace industry, which has not seen a new airplane design in the past four decades. We believe it's time for change.Position Overview:The aerospace testing landscape is often hindered by outdated methods and equipment, which delays product qualification and stifles innovation. At Amca, we aim to address these challenges head-on by integrating design, manufacturing, testing, and qualification processes within our facilities.As a Senior Test Engineer, you will be pivotal in establishing and managing the Prototype and Qualification Lab. This role entails defining the testing and qualification protocols for our cutting-edge products from the ground up. You will lead functional and environmental testing initiatives, develop test infrastructures, and collaborate closely with our design and manufacturing teams to influence product development from the early stages. This is a highly autonomous, hands-on position ideal for individuals passionate about implementing effective testing methodologies.

Join Hermeus as a Senior Flight Test Engineer, where you will play a crucial role in the rapid design, development, and testing of high-Mach and hypersonic aircraft. Collaborating closely with the Department of Defense, you will help create advanced aviation technologies that provide our nation and allies with a strategic edge over potential adversaries.

Revel develops software for managing critical hardware in fields like aerospace, automotive, energy, and manufacturing. The platform includes a command-and-control interface, a specialized programming language for hardware control, and a runtime environment designed for reliability and safety. The team’s goal is to help engineers build, test, and deploy essential systems with confidence. Role overview The Hardware Platform Engineer focuses on selecting, qualifying, and maintaining the hardware platforms that support Revel’s software stack. This work directly impacts the reliability and efficiency of field-deployed systems, especially in safety-critical settings. What you will do Choose hardware platforms suitable for Revel’s software and target industries Qualify platforms to meet reliability and safety standards Maintain hardware to ensure ongoing performance in demanding environments Location This position is based in Los Angeles.

K2 Space Corporation is at the forefront of space innovation, creating the largest and most powerful satellites ever launched. With significant backing of $450 million from prominent investors like Altimeter Capital, Redpoint Ventures, T. Rowe Price, Lightspeed Venture Partners, and Alpine Space Ventures, alongside an additional $500 million in secured contracts with both commercial and U.S. government clients, we are revolutionizing satellite technology for missions spanning from Low Earth Orbit (LEO) to deep space.As the space industry transitions towards heavy-lift launch vehicles, we are embracing an era of mass abundance, developing a new class of spacecraft designed to withstand extreme radiation and leverage the capabilities of today's advanced rockets. Our satellites offer unparalleled performance at constellation scale across various orbits.With numerous launches scheduled through 2026 and 2027, we are committed to Building Bigger as we aim to advance the exploration of our solar system and evolve into a Kardashev Type II (K2) civilization. If you are a driven individual who flourishes in a dynamic environment and are eager to be part of a pioneering Series C space startup, we encourage you to apply.

As a Test Engineer at Hermeus, you will play a pivotal role in ensuring the safety and reliability of our cutting-edge aerospace technology. You will work alongside a dynamic team of engineers and innovators dedicated to redefining air travel. Your responsibilities will include designing, executing, and analyzing tests, as well as collaborating with cross-functional teams to drive product excellence.

Join Parallel Systems as we redefine freight transportation with our groundbreaking autonomous battery-electric rail vehicles. Our mission is to revolutionize the $900 billion U.S. trucking industry by transitioning a significant portion to rail, offering innovative, eco-friendly logistics solutions that enhance safety and efficiency. Be a part of our vibrant team and contribute to creating a smarter, greener future for global freight.Position: Hardware Engineering Intern - Summer 2026 Internship

We are seeking a Lead Spacecraft Test Engineer to join our dynamic team at Apex Technology Inc. In this role, you will spearhead the testing protocols for spacecraft systems, ensuring the highest standards of quality and performance are met. You will collaborate with cross-functional teams to deliver innovative solutions and drive the success of our aerospace projects.

Join Apex Technology Inc. as a Spacecraft Structures Test Engineer, where you will play a pivotal role in ensuring the integrity and performance of spacecraft structures. You will be responsible for conducting comprehensive tests, analyzing data, and collaborating with multidisciplinary teams to enhance spacecraft design and functionality. This position offers a unique opportunity to contribute to cutting-edge aerospace projects in a dynamic and innovative environment.

Join AMCA International as a Mechanical Test Engineer in Los Angeles, where you will play a crucial role in the development and validation of cutting-edge mechanical systems. Your expertise will drive innovation and ensure the highest quality standards are maintained through rigorous testing protocols.