Software Controls Engineer
US$161,500 – US$190,000 / yr base salary
Posted 5 Aug 2026
Advertised as “Staff Software Controls Engineer - Site Control”
BranchFactor Summary
The original posting with the fluff stripped out
- Expected experience
- 8+ yrs
- Management level
- Individual contributor
- Employment
- On-Site
| Base salary | US$161,500 – US$190,000 / yr |
|---|
About Mainspring
Mainspring Energy manufactures and delivers fuel-flexible, low-emissions local power solutions that rapidly add new capacity and deliver reliable, affordable, and sustainable electric power. The company began commercial shipments of its Mainspring Linear Generators in 2020 and today has hundreds of megawatts in advanced development and field operations for leading Fortune 500 companies, data centers, and utilities. Mainspring also partners with global energy leaders including AEP, NextEra Energy Resources, Schneider Electric, and more.
The core values that ground our work, guide our decisions, and connect us together:
- Pragmatic Optimism
- Excellence without Ego
- Proactive Collaboration
Job Overview
Mainspring Energy is seeking a highly skilled Staff Controls Software Engineer to develop and test the critical software that integrates our Linear Generators into global energy infrastructure. As an individual contributor (IC) within a high-performing Scrum team, you will focus on building commercial-grade site control systems, ensuring seamless integration with Microgrids, Distributed Energy Resources (DERs), and utility-scale power plants. You will be responsible for writing high-quality code, conducting rigorous testing, and collaborating with your team to deliver the communication and control backbone of our technology.
Key Responsibilities
-
Technical Execution: Design, implement, and test control system features, ensuring they are robust and scalable for a high-volume manufacturing environment
-
Protocol Implementation: Develop and maintain communication interfaces using OPC-UA, Modbus, and other industrial protocols to ensure system interoperability
-
SCADA & HMI Development: Build and refine SCADA systems and HMI designs, focusing on creating intuitive operator interfaces and deep diagnostic visibility for the team
-
Agile Team Participation: Work closely within a Scrum framework, participating in sprint planning, code reviews, and daily stand-ups to deliver reliable software increments
-
Testing & Validation: Own the testing lifecycle for new features, including unit testing, integration testing, and hardware-in-the-loop (HIL) validation to ensure site safety logic and grid compliance