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# Staff Software Controls Engineer - Site Control

- **Company:** Mainspring Energy
- **Location:** Menlo Park, CA, United States
- **Experience:** Expert
- **Salary:** $161,500.0 - $190,000.0
- **Contract:** Permanent contract
- **Skills:** Agile Methodology, Unit Testing, Code Review, Hardware-In-The-Loop Simulation, Supervisory Control and Data Acquisition (SCADA), Interoperability, Modbus, Message Queuing Telemetry Transport (MQTT), Scrum Methodology, OPC Unified Architecture, Software Systems, Universal Asynchronous Receiver/Transmitter, Event Driven Architecture, Integration Tests, Process Control Systems, Iec61131-3, Win CC
- **Published:** August 7, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=ace3085061ad6d0c

## About the Role

* Industry Experience: 8+ years of hands-on experience in commercial power generation, industrial automation, or utility-scale energy projects
 * Systems Expertise: Expert proficiency with SCADA, HMI, and industrial controllers (PLCs/PACs). Deep hands-on experience with IEC 61131-3 for machine control and a strong preference for experience in IEC 61499 for event-driven architectures. Experience with industrial serial protocols ( like UART) is a plus
 * Deep Protocol Knowledge: Proven track record of developing and testing control logic for complex power sites (e.g., microgrids, large-scale solar + storage). Expert-level proficiency in OPC-UA, MQTT, Modbus, and DNP3 within secure industrial environments
 * Grid Interconnection Standards: Experience with grid interconnection standards (e.g., IEEE 1547, UL 1741)
 * Cybersecurity Frameworks: Knowledge of cybersecurity frameworks for industrial control systems (e.g., NERC CIP)
 * Technical Communication: Ability to create clear technical documentation and system diagrams that bridge the gap between industrial hardware and modern software

## Description

* 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
 * DER Integration: Implement strategies for integrating Mainspring technology into Distributed Energy Resource Management Systems (DERMS) and complex microgrid environments
 * Cross-Functional Collaboration: Work with Product and Hardware teams to translate utility requirements and interconnection standards into functional software specifications


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