Senior Reaction Controls Engineer

mainspringenergy· On product SW and Sys Engr
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📍 Menlo Park, CASalary💰 USD 134K–159K

About this role

Job Overview

    Do you love thermodynamics and dynamic system control? Have you thought about thermodynamic cycles as both continuous and discrete dynamic systems? As other industries convert their thermodynamic machines to electromagnetic machines and electrify their platforms, would you like to help generate that clean electricity?

    Linear generators are a new platform that take advantage of mechanically unconstrained piston motion to cleanly and efficiently oxidize a variety of environmentally friendly fuels with disparate properties (like biogas, hydrogen, and ammonia). The linear generator reaction is close to an ideal Otto cycle, so knowledge and intuition of engine control, thermodynamics, and reaction kinetics are applicable here.

    Mainspring has a high-impact opportunity for a Senior Controls Engineer on our reaction control team to help optimize the system performance by incorporating physics-based models with modern control algorithms to improve reliability, prolong service intervals, and increase power and efficiency.

Responsibilities

  • Implement models, algorithms, and continuous-integration (MIL, SIL, PIL) tests in C++

  • Develop novel fuel, air, compression ratio, and cooling automation and control strategies to improve performance, reliability, and expand the capabilities of the generator to address customer needs

  • Design, execute, and analyze experiments using Python on virtual or real generators to realize the impact of your work on real generators

  • Collaborate with other controls engineers on designs and architectures

  • Debug sensors, actuators, and subsystems for noise and disturbances and assist in calibration, verification, and validation. Communicate algorithms with block-diagrams, pseudo-code, code, etc.

  • Analyze complex thermodynamic-mechatronic systems with experimental data and create representative plant models

  • Support reliability and manufacturing testing of systems under control

  • Analyze data to assess performance capabilities and inform requirements and design decisions

  • Support fleet generator operation to enhance reliability and performance

Qualifications

  • Driven and self-directed enthusiastic contributor

  • Excellent communicator with demonstrated collaboration across multidisciplinary teams

  • Multiple years of experience designing, implementing, and testing algorithms in thermodynamic machines - experience with engines is a plus

  • BS + 5 years relevant experience, MS + 3 years, or Ph.D. in mechanical engineering or related degree 

Frequently Asked Questions

What is the salary for the Senior Reaction Controls Engineer role at mainspringenergy?
The listed salary for this Senior Reaction Controls Engineer position at mainspringenergy is USD 134K–159K. This is an Salary role.
Where is the Senior Reaction Controls Engineer position at mainspringenergy located?
This Senior Reaction Controls Engineer role at mainspringenergy is based in Menlo Park, CA. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Senior Reaction Controls Engineer role at mainspringenergy full-time or part-time?
This is listed as a Salary position. It is posted as a Senior Reaction Controls Engineer role in the On product SW and Sys Engr department at mainspringenergy.
Which team or department does the Senior Reaction Controls Engineer at mainspringenergy belong to?
This Senior Reaction Controls Engineer position is part of the On product SW and Sys Engr department at mainspringenergy. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Senior Reaction Controls Engineer position at mainspringenergy?
Click the "Apply Now" button on this page. You will be redirected to mainspringenergy's official application portal hosted on lever where you can submit your application directly.
When was the Senior Reaction Controls Engineer job at mainspringenergy posted?
This Senior Reaction Controls Engineer position at mainspringenergy was posted on Sep 17, 2026. Apply as soon as possible — early applications are often reviewed first.
Senior Reaction Controls Engineer
mainspringenergy · 💰 USD 134K–159K
Apply for this role ↗

You'll be redirected to mainspringenergy's official application page on Lever.