Senior Reaction Controls Engineer

Mainspring Energy

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

Posted 9/17/2026full-timeMenlo Park • California • United StatesSenior💰 $134,000 - $159,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and implementing algorithms for thermodynamic machines, with proficiency in C++ and Python. Capable of conducting experiments, analyzing data, and collaborating effectively within multidisciplinary teams.

Highest-signal resume keywords

C++ ProgrammingPython ProgrammingContinuous-Integration Testing (MIL, SIL, PIL)Thermodynamics and Engine ControlCalibration, Verification, and Validation

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Algorithm Design and ImplementationData AnalysisExperiment Execution and AnalysisDebugging Sensors and ActuatorsModel Creation

Soft Skills

Excellent CommunicationCollaboration Across TeamsSelf-Directed

Industry Keywords

Thermodynamic MachinesDynamic SystemsControl StrategiesReliability TestingPerformance Assessment

Tech Stack

Tools & technologies

PythonC++

About the role

Key responsibilities & impact

Implement models, algorithms, and continuous-integration (MIL, SIL, PIL) tests in C++
Develop fuel, air, compression ratio, and cooling automation and control strategies
Design, execute, and analyze experiments using Python on virtual or real generators
Collaborate with other controls engineers on designs and architectures
Debug sensors, actuators, and subsystems for noise and disturbances
Assist in calibration, verification, and validation
Communicate algorithms with block diagrams, pseudo-code, and code
Analyze complex thermodynamic-mechatronic systems with experimental data
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

Requirements

What you’ll need

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
Proficiency in C++
Proficiency in Python
Experience with continuous-integration testing (MIL, SIL, PIL)
Experience with thermodynamics, engine control, reaction kinetics, and dynamic systems
Experience debugging sensors, actuators, and subsystems
Experience with calibration, verification, and validation

Benefits

Comp & perks

Pre-IPO stock options
Benefits
Hybrid work arrangement (onsite + remote)