{"schemaVersion":"jobsearcher.job.v1","id":"d4196e8de3361e17b147942a","url":"https://jobsearcher.com/jobs/d4196e8de3361e17b147942a","canonicalUrl":"https://jobsearcher.com/jobs/d4196e8de3361e17b147942a","title":"Senior Algorithms and Simulation Software Engineer","description":"About Commonwealth Fusion Systems:\n\nCommonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy.\n\nCombining decades of research, top talent, and new technologies, we’re designing and building commercially viable fusion power plants. And we're working with policymakers, suppliers, and many others to build the energy industry of the future.\n\nWe’re in the best position to make it happen. Since 2018, we’ve raised $4 billion of capital, making us the largest and leading fusion company in the world.\n\nNow we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team.\n\nIf that’s you and this role fits, we want to hear from you.\n\nJoin the power movement as a Senior Algorithms and Simulation Software Engineer\n\nIn this role you will be responsible for the design and implementation of state estimation and control algorithms, plus models and simulation frameworks necessary to verify those algorithms. Your algorithms will be used in critical real-time applications in the SPARC project, as well as related projects.\n\nAs a member of the Software Engineering team, you will be a hands-on technical contributor. You will be a champion of writing excellent quality, production-ready code for mission-critical real-time systems. You will collect functional requirements from customers and produce software solutions to meet these requirements.\n\nYou will work with a variety of engineers to integrate your software into software testbeds, hardware testbeds, and the production tools. You will also contribute to the broader software ecosystem to improve tooling and processes used across the company.\n\nWhat you'll do:\nDevelop mission-critical state estimation and control algorithms\nDevelop software infrastructure to operate Hardware-in-the-Loop (HITL) and software-only testbeds\nDevelop simulation models and model infrastructure for both real-time and offline (high fidelity) simulations\nDevelop offline data analysis tools\nHelp define and execute end-to-end and other integrated test cases and test plans to validate SPARC control software\nWhat we’re looking for:\nBachelor's degree in a relevant engineering field (computer science, computer engineering, electrical engineering, industrial engineering, etc.)\n7+ years relevant experience\nProfessional experience writing real-time state estimation and control algorithms\nExperience with modern software development lifecycle practices (CI/CD, git version control, unit testing, integration testing, etc)\nProficiency with Python\nProficiency with at least one real-time control language (C++, Rust, etc)\nBonus points for:\nExperience with Hardware-in-the-Loop testbeds and software-only testbeds for validating control software\nExperience writing models to validate software\nFamiliarity with Linux\nFamiliarity with general networking (IP/UDP)\nMust-have Requirements:\nPerform activities such as typing, standing, sitting, etc. for extended periods of time\nDedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, and cryogenics\nWillingness to occasionally travel or work required nights/weekends/on-call\nSalary range for this full-time position + equity + benefits. The actual salary will depend on level, location, qualifications, and experience. The range displayed on each job posting reflects new hire salaries for the position across all US locations. Benefits include:\n• Competitive compensation with equity\n• 13 Company-wide Holidays\n• Flexible vacation days\n• 10 sick days\n• Generous parental leave policy\n• Health, dental, and vision insurance\n• 401(k) with employer matching\n• Professional growth opportunities\n• Team-building activities\n#LI-Hybrid\n\nAt CFS, we excel in fast-paced environments, driven by our values of integrity, execution, impact, and self-critique. As we grow, we’re eager to bring on mission-driven folks who offer diverse perspectives and fresh ways to tackle challenges.\n\nWe value diversity deeply and are proud to be an equal opportunity employer by choice. We consider all qualified applicants equally, regardless of race, color, national origin, ancestry, citizenship status, protected veteran status, religion, physical or mental disability, marital status, sex, sexual orientation, gender identity or expression, age, or any other basis protected by law.\n\nThis role requires compliance with U.S. laws concerning the export of controlled or protected technologies or information (collectively, “Export Control Laws\"). Any offer of employment will be contingent on the need for compliance with such Export Control Laws.","company":"Commonwealthfusionsystems5","rawCompany":"commonwealthfusionsystems5","city":"Devens","state":"MA","isRemote":false,"isActive":false,"createdAt":"2026-10-02T08:33:49.032Z","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":"541330","title":"Engineering Services","slug":"engineering-services"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"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"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Senior Algorithms and Simulation Software Engineer","description":"About Commonwealth Fusion Systems:\n\nCommonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy.\n\nCombining decades of research, top talent, and new technologies, we’re designing and building commercially viable fusion power plants. And we're working with policymakers, suppliers, and many others to build the energy industry of the future.\n\nWe’re in the best position to make it happen. Since 2018, we’ve raised $4 billion of capital, making us the largest and leading fusion company in the world.\n\nNow we’re looking for more thinkers, doers, builders, and makers to join us. People who’ll bring new perspectives, solve tough problems, and thrive as part of a team.\n\nIf that’s you and this role fits, we want to hear from you.\n\nJoin the power movement as a Senior Algorithms and Simulation Software Engineer\n\nIn this role you will be responsible for the design and implementation of state estimation and control algorithms, plus models and simulation frameworks necessary to verify those algorithms. Your algorithms will be used in critical real-time applications in the SPARC project, as well as related projects.\n\nAs a member of the Software Engineering team, you will be a hands-on technical contributor. You will be a champion of writing excellent quality, production-ready code for mission-critical real-time systems. You will collect functional requirements from customers and produce software solutions to meet these requirements.\n\nYou will work with a variety of engineers to integrate your software into software testbeds, hardware testbeds, and the production tools. You will also contribute to the broader software ecosystem to improve tooling and processes used across the company.\n\nWhat you'll do:\nDevelop mission-critical state estimation and control algorithms\nDevelop software infrastructure to operate Hardware-in-the-Loop (HITL) and software-only testbeds\nDevelop simulation models and model infrastructure for both real-time and offline (high fidelity) simulations\nDevelop offline data analysis tools\nHelp define and execute end-to-end and other integrated test cases and test plans to validate SPARC control software\nWhat we’re looking for:\nBachelor's degree in a relevant engineering field (computer science, computer engineering, electrical engineering, industrial engineering, etc.)\n7+ years relevant experience\nProfessional experience writing real-time state estimation and control algorithms\nExperience with modern software development lifecycle practices (CI/CD, git version control, unit testing, integration testing, etc)\nProficiency with Python\nProficiency with at least one real-time control language (C++, Rust, etc)\nBonus points for:\nExperience with Hardware-in-the-Loop testbeds and software-only testbeds for validating control software\nExperience writing models to validate software\nFamiliarity with Linux\nFamiliarity with general networking (IP/UDP)\nMust-have Requirements:\nPerform activities such as typing, standing, sitting, etc. for extended periods of time\nDedication to safety to mitigate industrial hazards that may include heat, cold, noise, fumes, strong magnets, lead (Pb), high voltage, high current, pressure systems, and cryogenics\nWillingness to occasionally travel or work required nights/weekends/on-call\nSalary range for this full-time position + equity + benefits. The actual salary will depend on level, location, qualifications, and experience. The range displayed on each job posting reflects new hire salaries for the position across all US locations. Benefits include:\n• Competitive compensation with equity\n• 13 Company-wide Holidays\n• Flexible vacation days\n• 10 sick days\n• Generous parental leave policy\n• Health, dental, and vision insurance\n• 401(k) with employer matching\n• Professional growth opportunities\n• Team-building activities\n#LI-Hybrid\n\nAt CFS, we excel in fast-paced environments, driven by our values of integrity, execution, impact, and self-critique. As we grow, we’re eager to bring on mission-driven folks who offer diverse perspectives and fresh ways to tackle challenges.\n\nWe value diversity deeply and are proud to be an equal opportunity employer by choice. We consider all qualified applicants equally, regardless of race, color, national origin, ancestry, citizenship status, protected veteran status, religion, physical or mental disability, marital status, sex, sexual orientation, gender identity or expression, age, or any other basis protected by law.\n\nThis role requires compliance with U.S. laws concerning the export of controlled or protected technologies or information (collectively, “Export Control Laws\"). Any offer of employment will be contingent on the need for compliance with such Export Control Laws.","datePosted":"2026-10-02T08:33:49.032Z","dateModified":"2026-10-02T08:33:49.032Z","hiringOrganization":{"@type":"Organization","name":"Commonwealthfusionsystems5","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Devens","addressRegion":"MA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"d4196e8de3361e17b147942a"},"url":"https://jobsearcher.com/jobs/d4196e8de3361e17b147942a"}}