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Commonwealth Fusion Systems

Senior Embedded Software Engineer

Compensation
$140K–$200K / yr
Location
Devens, MA, US
Arrangement
Hybrid
Employment type
Full-time
Level
Senior
Posted
21 August 2026 (about a month ago)

Checked todayApplications go to the employer, never to RoleSprint

About this role

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.

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 Embedded Software Engineer As a Senior Embedded Software Engineer, you will be responsible for the design, implementation, and verification of software and controls for advanced R&D equipment and complex machinery. 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 control software across multiple platforms, including real-time Linux, microcontrollers, and FPGAs

• Verify embedded software with Hardware-in-the-loop testbeds and field commissioning activities

• Improve software tooling to increase developer velocity and enable new capabilities

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 with embedded, real-time control systems

• Professional experience with producing production quality control 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 mission or safety critical systems

• Experience with large-scale industrial systems

• Familiarity with real-time Linux

• Familiarity with bare-metal micro controllers

• Familiarity with FPGA development

• Familiarity with common I/O protocols (SPI, CAN, serial, etc)

• 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.

Work location

  • Devens, MA, US

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About this listing

Advertised by Cfsenergy and published on Lever, the applicant tracking system they use.

RoleSprint is not the employer and not a recruiter. Applications are made on the employer’s own site and never reach us; what RoleSprint does is help you decide whether a role is worth your time and prepare for it if it is.

Published 21 August 2026, last checked today. A posting stops being advertised here 90 days after the employer published it, and one the employer takes down is marked closed rather than quietly removed.

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