{"schemaVersion":"jobsearcher.job.v1","id":"49ab91affda20ba495eaaa10","url":"https://jobsearcher.com/jobs/49ab91affda20ba495eaaa10","canonicalUrl":"https://jobsearcher.com/jobs/49ab91affda20ba495eaaa10","title":"Software Engineer, Systems Simulation & Test","description":"About the Company\r\nGeneral Matter enriches uranium.\r\nWe are designing, building, and operating the world’s lowest-cost enrichment services, here in the US.\r\nIn the process, we are restoring America’s ability to produce nuclear fuel to power AI, advanced manufacturing and critical industries our country relies on to remain competitive.\r\nFuel drives the cost of advanced reactor electricity production, and enrichment drives the cost of the fuel that advanced reactors consume. Reliable, low-cost enrichment is the catalyst for the nuclear Renaissance now under way.\r\nOur mission is to make nuclear not only the cleanest and safest source of baseload power, but also the most affordable. We believe abundant nuclear energy will lead to a post-scarcity society.\r\nWe were incubated inside Founders Fund, like Anduril and Palantir before us, and are backed by over a dozen of the world's top venture capital firms.\r\nOur lean, world-class team of engineers and operators is applying a first-principles approach to solving the problem of nuclear fuel production.\r\nWe are a mission-driven company with a culture of urgency, accountability, and transparency.\r\nHelp us build a high-energy society by making the cleanest, safest form of baseload energy the most affordable.\r\nSimulation Software Engineer\r\nWe are seeking a Simulation Software Engineer to design and build the high-fidelity simulators that model our physical systems, hardware, and control behavior. This role sits at the intersection of physical systems modeling and high-performance software engineering, and is responsible for building simulators that accurately reflect real-world behavior and accelerate testing, validation, and control system development in partnership with hardware, chemical, and electrical engineering teams. The successful candidate will play a central role in defining the architecture, implementation standards, and operational reliability of mission-critical simulation systems.\r\nResponsibilities\r\nArchitect and own simulators for large, distributed systems with complex interactions, feedback loops, and failure modes.\r\nModel system dynamics and control behavior across nominal and off-nominal operating conditions.\r\nBuild scalable infrastructure for high-volume simulation, scenario generation, and automated validation.\r\nDefine correctness criteria andvalidatesimulation outputs against test and real-world data in partnership with systems and hardware teams.\r\nSupport hardware-in-the-loop (HIL) and software-in-the-loop (SIL) testbeds that exercise control and system software against simulated plant behavior.\r\nBasic Qualifications\r\nBachelor’s degree or higher in Computer Science, Electrical Engineering, Mechanical Engineering, Physics, or a related field.\r\n7+ years of experience building simulators for complex, real-world systems.\r\nStrong programming skills in C++ and/or Python with experience handling large data flows.\r\nDeep understanding of modeling distributed systems, control systems, or physical processes.\r\nExperiencevalidatingsimulations against empirical data or hardware-in-the-loop setups.\r\nHigh standardsfor correctness, robustness, and engineering rigor.\r\nPreferred Skills and Experience\r\nExperience simulating industrial, aerospace, energy, or similarly complex systems (e.g., chemical plants, rockets, power grids).\r\nBackground in control theory, numerical methods, or systems modeling.\r\nExperience running large-scale simulations for design validation or fault analysis.\r\nFamiliarity with performance optimization and parallel or distributed simulation.\r\nFamiliarity with automated test frameworks and continuous integration for simulation and test workflows.\r\nHands-on experience with HIL/SIL testbeds, including working knowledge of the underlying physical systems, instrumentation, and hardware interfaces they exercise.\r\nExperienceoperatingin high-stakes, safety-critical engineering environments.\r\nDemonstrated technical leadership in setting engineeringstandards andbuilding and mentoring high-performance engineering teams.\r\nAdditional Requirements\r\nAbility to work extended hours and weekends as necessary.\r\nAbility to come into our office every day. This role is 100% on site and in person.\r\nCurrently a US Citizen with capability to obtain and maintain a US Q clearance.\r\nEqual Opportunity Employer\r\nGeneral Matter is an Equal Opportunity Employer; employment with General Matter is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.\r\nCompensation and Benefits\r\nThe base salary range for this role is$100,000–$200,000annually.\r\nCompensation bands are determined by role, level, location, and alignment with market data. Individual level and base pay is determined on a case-by-case basis and may vary based on job-related skills, education, experience, technical capabilities and internal equity. Please note that the stated salary range is an estimate and may be adjusted based on market conditions, business needs, or other factors. In addition to base salary, for full-time hires, you may also be eligible for long-term incentives, in the form of stock options, and access to medical, vision & dental coverage as well as access to a 401(k) retirement plan.#J-18808-Ljbffr","company":"Generalmatter","rawCompany":"generalmatter","city":"Los Angeles","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-10-08T01:17:12.339Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"17-2199.00","title":"Engineers, All Other","slug":"engineers-all-other"}],"industries":[{"code":"541715","title":"Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)","slug":"research-and-development-in-the-physical-engineering-and-life-sciences-except-nanotechnology-and-biotechnology"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"},{"code":"541330","title":"Engineering Services","slug":"engineering-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Software Engineer, Systems Simulation & Test","description":"About the Company\r\nGeneral Matter enriches uranium.\r\nWe are designing, building, and operating the world’s lowest-cost enrichment services, here in the US.\r\nIn the process, we are restoring America’s ability to produce nuclear fuel to power AI, advanced manufacturing and critical industries our country relies on to remain competitive.\r\nFuel drives the cost of advanced reactor electricity production, and enrichment drives the cost of the fuel that advanced reactors consume. Reliable, low-cost enrichment is the catalyst for the nuclear Renaissance now under way.\r\nOur mission is to make nuclear not only the cleanest and safest source of baseload power, but also the most affordable. We believe abundant nuclear energy will lead to a post-scarcity society.\r\nWe were incubated inside Founders Fund, like Anduril and Palantir before us, and are backed by over a dozen of the world's top venture capital firms.\r\nOur lean, world-class team of engineers and operators is applying a first-principles approach to solving the problem of nuclear fuel production.\r\nWe are a mission-driven company with a culture of urgency, accountability, and transparency.\r\nHelp us build a high-energy society by making the cleanest, safest form of baseload energy the most affordable.\r\nSimulation Software Engineer\r\nWe are seeking a Simulation Software Engineer to design and build the high-fidelity simulators that model our physical systems, hardware, and control behavior. This role sits at the intersection of physical systems modeling and high-performance software engineering, and is responsible for building simulators that accurately reflect real-world behavior and accelerate testing, validation, and control system development in partnership with hardware, chemical, and electrical engineering teams. The successful candidate will play a central role in defining the architecture, implementation standards, and operational reliability of mission-critical simulation systems.\r\nResponsibilities\r\nArchitect and own simulators for large, distributed systems with complex interactions, feedback loops, and failure modes.\r\nModel system dynamics and control behavior across nominal and off-nominal operating conditions.\r\nBuild scalable infrastructure for high-volume simulation, scenario generation, and automated validation.\r\nDefine correctness criteria andvalidatesimulation outputs against test and real-world data in partnership with systems and hardware teams.\r\nSupport hardware-in-the-loop (HIL) and software-in-the-loop (SIL) testbeds that exercise control and system software against simulated plant behavior.\r\nBasic Qualifications\r\nBachelor’s degree or higher in Computer Science, Electrical Engineering, Mechanical Engineering, Physics, or a related field.\r\n7+ years of experience building simulators for complex, real-world systems.\r\nStrong programming skills in C++ and/or Python with experience handling large data flows.\r\nDeep understanding of modeling distributed systems, control systems, or physical processes.\r\nExperiencevalidatingsimulations against empirical data or hardware-in-the-loop setups.\r\nHigh standardsfor correctness, robustness, and engineering rigor.\r\nPreferred Skills and Experience\r\nExperience simulating industrial, aerospace, energy, or similarly complex systems (e.g., chemical plants, rockets, power grids).\r\nBackground in control theory, numerical methods, or systems modeling.\r\nExperience running large-scale simulations for design validation or fault analysis.\r\nFamiliarity with performance optimization and parallel or distributed simulation.\r\nFamiliarity with automated test frameworks and continuous integration for simulation and test workflows.\r\nHands-on experience with HIL/SIL testbeds, including working knowledge of the underlying physical systems, instrumentation, and hardware interfaces they exercise.\r\nExperienceoperatingin high-stakes, safety-critical engineering environments.\r\nDemonstrated technical leadership in setting engineeringstandards andbuilding and mentoring high-performance engineering teams.\r\nAdditional Requirements\r\nAbility to work extended hours and weekends as necessary.\r\nAbility to come into our office every day. This role is 100% on site and in person.\r\nCurrently a US Citizen with capability to obtain and maintain a US Q clearance.\r\nEqual Opportunity Employer\r\nGeneral Matter is an Equal Opportunity Employer; employment with General Matter is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.\r\nCompensation and Benefits\r\nThe base salary range for this role is$100,000–$200,000annually.\r\nCompensation bands are determined by role, level, location, and alignment with market data. Individual level and base pay is determined on a case-by-case basis and may vary based on job-related skills, education, experience, technical capabilities and internal equity. Please note that the stated salary range is an estimate and may be adjusted based on market conditions, business needs, or other factors. In addition to base salary, for full-time hires, you may also be eligible for long-term incentives, in the form of stock options, and access to medical, vision & dental coverage as well as access to a 401(k) retirement plan.#J-18808-Ljbffr","datePosted":"2026-10-08T01:17:12.339Z","dateModified":"2026-10-08T01:17:12.339Z","hiringOrganization":{"@type":"Organization","name":"Generalmatter","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Los Angeles","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"49ab91affda20ba495eaaa10"},"url":"https://jobsearcher.com/jobs/49ab91affda20ba495eaaa10"}}