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RF Electronics Engineer
Job Location:
Job Location:
Devens, MA - USA
Yearly Salary:
USD 90000 - 145000
Yearly Salary:
Posted:
29 September 2026 (5 days ago)
Posted:
Application Deadline:
27 December 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 an RF Electronics Engineer
SPARC sustains fusion reactions by feeding >25MW of 120MHz RF power into the tokamak to heat the plasma to 100 million Kelvin. We need an RF Test Engineer to play a pivotal role in validating and testing the electronics and control systems that power the most ambitious RF plant in the world.
At this level you are a hands-on executor and technical problem solver. You will be directly responsible for taking newly architected RF and power electronics from the benchtop to full-scale operation. Your day-to-day will span board-level bring-up operating high-power RF transmitters and integrating hardware with software controls to ensure SPARC achieves net energy.
For more information on the SPARC RF plant see the SPARC journal papers here:
What youll do:
- Architect and design custom control boards precision power supplies and sensing circuits required to drive distributed high-power solid-state RF amplifiers
- Partner closely with cross-functional teams including software RF mechanical and manufacturing engineers to ensure your custom electronic designs integrate seamlessly into the broader system architecture
- Write comprehensive technical specifications for external vendors and internal matrix support teams to ensure manufactured components meet stringent requirements
- Perform advanced simulation and modeling of electronic circuits and power systems to validate performance
- Physically assemble and bring up initial prototypes on the bench ensuring your designs transition flawlessly into the integrated RF system
What were looking for:
- Bachelors degree in Electrical Engineering or a related field
- 5 years of hands-on experience designing power electronics control boards or RF support circuitry
- Hands-on experience using circuit simulation software (e.g. SPICE) to model and validate circuit designs
- Exceptional PCB design skills utilizing Altium or similar software specifically geared toward instrumentation sensing power supplies and control systems
- High proficiency in modeling tools to validate electronics architecture and mitigate EMI/EMC issues in high-power high-noise environments
Bonus points for:
- Experience working with high voltage systems and in high voltage environments
- Background in requirements engineering specifically decomposing high-level system requirements into actionable hardware specifications
- Direct experience working with RF systems with a strong bonus for candidates who have worked on high-power RF heating systems
- Experience with thermal management techniques for densely packed high-power printed circuit board assemblies
- Experience translating complex engineering needs into clear manufacturing specifications for contract manufacturers and cross-functional teams
- A strong systems-level understanding of modern high-performance embedded digital controllers and high-speed communications
Must-have Requirements:
- Ability to lift up to 50lbs
- Perform activities such as stooping climbing standing typing or sitting for extended periods of time
- Willingness to travel or work required nights/weekends/on-call occasionally
- Work in a facility that contains industrial hazards including heat cold noise fumes strong magnets lead (Pb) high voltage high current pressure systems and cryogenics
$90000 - $145000 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-Onsite
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:
IC
