Demo

Algorithms and Simulation Software Engineer

Commonwealth Fusion Systems
Devens, MA Full Time
POSTED ON 3/19/2025
AVAILABLE BEFORE 5/19/2025

About Commonwealth Fusion Systems: 


Commonwealth Fusion Systems is on a mission to deliver the urgent transition to fusion energy.


Combining decades of research, top talent and new technologies, we’re designing and building commercially viable fusion power plants. And working with policymakers and suppliers to build the energy industry of the future. 


We’re in the best position to make it happen. Since 2018, we’ve raised over $2 billion in capital – more than any other fusion energy company in the U.S.


Now 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. 


If that’s you and this role fits, we want to hear from you.


Join the power movement as an Algorithms and Simulation Software Engineer


The SPARC Software team seeks an exceptional software engineer to be a member of the Realtime Algorithms & Simulation group.  This team is responsible for high-level tokamak orchestration, collaborating with fusion scientists to develop real-time plasma control algorithms, hardware-in-the-loop testbeds and simulation infrastructure necessary for validation, and develop other safety-critical control software that runs the SPARC tokamak and plant. SPARC senses thousands of physical measurements while controlling millions of amps to superconducting magnets and millions of watts of RF power to the plasma. These closed-loop systems must control at rates substantially greater than 1 kHz and must sample some parameters in the MHz range. The technology platforms involved include real-time Linux, bare-metal microcontrollers, FPGAs, and industrial PLCs.  The testbeds and simulation environments must be able to validate software across all these platforms. The team will be responsible for both Hardware-in-the-Loop (HITL) and software-only testbeds. Specific infrastructure you will help develop may include software for test orchestration, deployment to testbeds, evaluation of test success, and automatic integration into continuous integration systems.  The team will also develop models or model infrastructure for both real-time simulation (e.g. for HITL or operator training) or offline analysis (e.g. for high-fidelity algorithm development). Finally, the team will work with other software and engineering teams to define end-to-end and other integrated test cases and test plans to validate overall SPARC control software and ensure its adherence to design requirements.

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What you'll do:
  • Develop safety-critical tokamak control software
  • Develop software infrastructure to operate Hardware-in-the-Loop (HITL) and software-only testbeds
  • Develop simulation models and model infrastructure for both real-time and off-line (high fidelity) simulations
  • Develop offline data analysis tools
  • Help define and execute end-to-end and other integrated test cases and test plans to validate SPARC control software
  • Work with hardware engineers to integrate/validate new components


What we're looking for:
  • Engineering degree in related field, such as computer science, computer engineering, electrical engineering, etc.
  • Experience in developing software in python, C , or similar languages.
  • Experience in developing simulations to test embedded and real-time software.
  • Experience in working on and developing infrastructure for Hardware-in-the-loop (HITL) testbeds and software-only testbeds.
  • Experience with modern continuous integration and continuous deployment tools
  • Ability to occasionally lift up to 50 lbs
  • Perform activities such as typing for extended periods of time
  • Willingness to travel or work required nights/weekends/on-call occasionally


Bonus points for:
  • Experience in validating software for safety-critical applications
  • Experience with validating industrial control software
  • Experience with developing physics based software models
  • Linux development
  • Microcontroller or FPGA development
  • Networking development (IP/UDP/TCP)
  • PLC development
  • Software/hardware interfaces (ADCs/DACs, UARTS, etc.)
  • Simulation hardware platforms (e.g. PXI)


Must-have requirements:
  • Ability to occasionally lift up to 50 lbs
  • Perform activities such as typing for extended periods of time
  • Willingness to travel or work required nights/weekends/on-call occasionally


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$80,000 - $180,000 a year
Salary range for this full-time position equity benefitsThe 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:
•  Competitive compensation with equity
•  12.5 Company-wide Holidays
•  Flexible vacation days
•  10 sick days
•  Generous parental leave policy
•  Health, dental, and vision insurance
•  401(k) with employer matching
•  Professional growth opportunities
•  Team-building activities
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#LI-Onsite


At 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.


We 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.

Salary : $80,000 - $180,000

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