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Senior Algorithms and Simulation Software Engineer
Job Location:
Job Location:
Devens, MA - USA
Yearly Salary:
$ 140000 - 200000
Yearly Salary:
Posted:
22 August 2026 (Yesterday)
Posted:
Application Deadline:
19 November 2026
Application Deadline:
Vacancies:
1 Vacancy
Vacancies:
Job Summary
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 were designing and building commercially viable fusion power plants. And were working with policymakers suppliers and many others to build the energy industry of the future.
Were in the best position to make it happen. Since 2018 weve raised $4 billion of capital making us the largest and leading fusion company in the world.
Now were looking for more thinkers doers builders and makers to join us. People wholl bring new perspectives solve tough problems and thrive as part of a team.
If thats you and this role fits we want to hear from you.
Join the power movement as a Senior Algorithms and Simulation Software Engineer
In this role you will be responsible for the design and implementation of state estimation and control algorithms plus models and simulation frame works necessary to verify those algorithms. Your algorithms will be used in critical real-time applications in the SPARC project as well as related projects.
As 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.
You 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.
What youll do:
- Develop mission-critical state estimation and control algorithms
- 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
What were looking for:
- Bachelors degree in a relevant engineering field (computer science computer engineering electrical engineering industrial engineering etc.)
- 7 years relevant experience
- Professional experience writing real-time state estimation and control algorithms
- Professional experience writing production quality state estimation and software
- Experience with modern software development lifecycle practices (CI/CD git version control unit testing integration testing etc)
- Proficiency with python
- Proficiency with at least one real-time control language (c rust etc)
Bonus points for:
- Experience with Hardware-in-the-Loop testbeds and software-only testbeds for validating control software
- Experience writing models to validate software
- Familiarity with Linux
- Familiarity with general networking (IP/UDP)
Must-have Requirements:
- Perform activities such as typing standing sitting etc. for extended periods of time
- Dedication 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
- Willingness to occasionally travel or work required nights/weekends/on-call
$140000 - $200000 a year
Salary 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:
Competitive compensation with equity
13 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
#LI-Hybrid
At CFS we excel in fast-paced environments driven by our values of integrity execution impact and self-critique. As we grow were 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.
This 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.
Required Experience:
Senior IC
