Senior Algorithms and Simulation Software Engineer
Commonwealth Fusion Systems · Hybrid
MeritLog read this listing from Commonwealth Fusion Systems's Lever job board and last checked it on September 12, 2026.
Source: the employer's Lever job board. Open the original listing for current details.
Job details
- Work model
- Hybrid
- Salary
- $140,000 - $200,000
- Location
- Devens, MA
Hiring context
How this role compares at Commonwealth Fusion Systems
Commonwealth Fusion Systems has 104 live roles in MeritLog’s catalog across 9 job families, and 69 of them are in engineering. 104 of those listings publish a pay range, a disclosure rate of 100%.
This role's posted range of $140,000 - $200,000 sits above 70% of the 70 other Commonwealth Fusion Systems roles quoted over the same currency and period.
Commonwealth Fusion Systems concentrates this hiring in:
Counted across the job boards MeritLog tracks, at the time this page was served. Pay comparisons use only listings that publish a complete range in the same currency and period.
What the role asks for
What you'd 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
- Bachelor's 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)
What they're asking for
- Experience with Hardware-in-the-Loop testbeds and software-only testbeds for validating control softwareSkillPreferred
- Experience writing models to validate softwareSkillPreferred
- Familiarity with LinuxSkillPreferred
- Familiarity with general networking (IP/UDP)SkillPreferred
- Perform activities such as typing, standing, sitting, etc. for extended periods of timeSkillPreferred
- 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 cryogenicsSkillPreferred
- Willingness to occasionally travel or work required nights/weekends/on-callSkillPreferred
Parsed by MeritLog from the employer’s own posting. The full description follows below.
Job description
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 we're working with policymakers, suppliers, and many others to build the energy industry of the future. We’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. 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 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 you'll 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 we’re looking for: • Bachelor's 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 #LI-Hybrid 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. 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.
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