Software & Controls Engineer - Energy Management Systems

ON.energy; Houston (TX); On-site; USD 90,000 - 150,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

401(k) with company match

Paid time off

Job summary

ON.energy is hiring a Software & Controls Engineer in Houston, TX to design, develop, test, and deploy control software for energy storage and power infrastructure. You will bridge software, control systems, and field deployment, coordinating with internal teams, vendors, and clients to deliver high-performance control solutions.

The role focuses on designing control strategies, implementing PLC/HMI/embedded software, and ensuring safety and regulatory compliance across FATs, SATs, and field

Qualifications

• Bachelor's degree in Electrical Engineering, Controls, Software Engineering, or related field.
• 3-5 years of experience developing PLC, HMI, and control software for industrial or energy systems.
• Strong object-oriented programming skills (C++, C#, Python).

Responsibilities

• Design, model, and implement control algorithms for energy storage systems and power infrastructure.
• Design, develop, and maintain PLC, HMI, and embedded/control software.
• Configure, integrate, and maintain SCADA systems for BESS and power infrastructure.
• Write clean, well-documented code and build CI/CD pipelines.
• Collaborate with cross-functional teams for full system functionality.

Skills

C++

C#

Python

OO programming

Education

Bachelor's degree in Electrical/Controls/Software

Tools

Siemens TIA Portal

Ignition SCADA

Job description

ON.energy is building the power infrastructure that makes the AI era possible. As AI demand surges past what the grid and traditional data centers can support, ON.energy provides a new class of power technology proven at gigawatt scale and trusted by the world’s leading cloud and AI companies. Our systems are already deployed across 2.5 GW of hyper-scale campuses, validated by top U.S. national labs, and certified for grid-safe operation by major utilities. With real products in the field, we're scaling faster than the grid can, transforming power from a bottleneck into a competitive advantage for the companies building the future.

The Software & Controls Engineer is responsible for the design, development, testing, integration, and commissioning of control software and automation systems that ensure the reliable, efficient, and safe operation of energy storage systems and power infrastructure projects. This role bridges software engineering, control systems, and field deployment, working closely with internal engineering teams, project management, vendors, and clients to deliver high-performance control and SCADA solutions that meet safety, regulatory, and operational requirements.

Key Responsibilities

• Design, model, and implement control algorithms and control strategies for energy storage systems and power infrastructure.
• Contribute to system architecture discussions and define control strategy requirements and functional specifications.
• Design, develop, and maintain PLC, HMI, and embedded/control software for energy storage and distributed energy systems.
• Configure, integrate, and maintain SCADA systems for BESS and power infrastructure projects.
• Write clean, efficient, maintainable, and well-documented code following best practices.
• Build automation scripts, testing tools, simulation environments, and continuous integration pipelines.
• Implement version control, software documentation, and CI/CD workflows.
• Collaborate with electrical, mechanical, firmware, and field service teams to ensure full system functionality and seamless integration.
• Support the selection, configuration, and integration of control hardware, including controllers, relays, meters, and network devices.
• Conduct Factory Acceptance Tests (FATs) and Site Acceptance Tests (SATs).
• Diagnose and resolve issues related to control logic, real-time execution, PLC/SCADA behavior, and system performance, both remotely and on-site.
• Ensure compliance with cybersecurity requirements and relevant standards and codes (e.g., UL, IEEE, NFPA).
• Support installation, commissioning, field deployments, and ongoing operational troubleshooting.
• Interface with clients, vendors, and internal stakeholders to provide technical documentation, training, and ongoing support.

Requirements

• Bachelor’s degree in Electrical Engineering, Controls, Software Engineering, or a related field, or equivalent experience.
• 3-5 years of experience developing PLC, HMI, and control software for industrial or energy systems
• Strong object-oriented programming skills (e.g., C++, C#, Python, or similar).
• Hands-on experience with Siemens PLC programming (TIA Portal).
• Experience with Ignition SCADA, including HMI development and system integration.
• Familiarity with control algorithms, real-time systems, and industrial automation concepts.
• Knowledge of industrial communication protocols (e.g., Modbus, OPC UA, Profinet).
• Experience with version control systems and structured software development practices.
• Ability to troubleshoot control systems both remotely and on-site.
• Willingness to travel for commissioning and field deployments, including travel to the United States

For US-based roles - What you'll get:

• Competitive salary + annual performance-based bonus eligibility
• Medical, dental, and vision insurance
• 401(k) with company match
• Paid time off and company holidays

For Mexico-based roles - What you'll get:

• Competitive salary + annual performance bonus eligibility
• Christmas Bonus (Aguinaldo): 30 days
• Major medical expenses and life insurance
• Paid time off and holidays (per local policy)

For all roles:

• Professional development and growth opportunities
• Opportunity to grow with a mission-driven team shaping the future of clean energy
• Equal Opportunity: ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation.
• Accommodations: If you need an accommodation during the application process, email [e-mail]
• Benefits vary by role and location and are subject to change.