What We Are Looking For:

As a Principal Controls Engineer, you will serve as a technical leader and architect across our clean energy edge platforms, including EMS, PPC, SCADA, and Logger. You will drive the design and implementation of scalable, high-performance renewable energy control systems.

This role demands deep technical expertise; strategic thinking; and the ability to lead, mentor, and influence engineering teams. You will collaborate with cross-functional stakeholders to define technical roadmaps, establish architectural standards, and ensure the delivery of robust, maintainable, and innovative software solutions that accelerate the clean energy transition.

Responsibilities:

• Technical Leadership – Collaborate with a cross-functional group and act as lead for a team of controls engineers.
• Technical Strategy – Collaborate with product and engineering leadership to shape long-term technical strategy and roadmap.
• Controls Development – Design, develop, and maintain robust controls features, from application interfaces to complex controls algorithms.
• Software Development Integration - Collaborate with Edge Software teams to implement integrated product offerings.
• Testing & Quality Assurance – Oversee comprehensive unit, integration, and end-to-end tests using modern testing frameworks to ensure code reliability and maintainability.
• Code Reviews & Mentorship - Participate in code reviews, provide constructive feedback to team members, and mentor junior engineers in best practices and technical skills.
• Technical Innovation - Stay current with emerging technologies and industry trends, proposing and implementing new tools and approaches that improve development efficiency and product capabilities.
• Other duties as assigned.

Requirements:

• Education - B.S/M.S in Electrical Engineering, Software Engineering, Computer Science, or related technical field preferred, or equivalent practical experience.
• Experience – 12 years of professional controls development experience with a proven track record of delivering complex control system designs.
• Controls Expertise - Strong proficiency in PLC programming for at least one major controls manufacturer or controls SDK, leveraging IEC 61131-3 coding languages; Familiarity with MATLAB and Simulink; and virtual hardware simulators.
• Programming Proficiency - Solid experience with at least one coding language; like Python, C, or C++.
• Version Control & Collaboration - Proficiency with Git workflows, code review processes, and collaborative development practices in distributed teams.
• Testing Practices - Experience with automated testing frameworks and methodologies, including unit testing, integration testing, and test-driven development (TDD).
• DevOps Awareness - Familiarity with CI/CD pipelines, deployment automation, and monitoring tools. Experience with GitLab CI, GitHub Actions, or similar platforms.
• Industrial User Interfaces – Experience with SCADA platforms or other industrial user interfaces.
• Problem-Solving Skills - Strong analytical and debugging skills with the ability to troubleshoot complex technical issues across the full stack.
• Communication Skills - Excellent verbal and written communication skills with the ability to collaborate effectively with technical and non-technical stakeholders.
• Industry Interest - Genuine interest in clean energy, sustainability, and making a positive environmental impact through technology solutions.

Preferred Qualifications:

• Experience with MATLAB/Simulink, CodeSys, SEL RTAC, and Linux-based real-time controllers.
• Knowledge of energy industry standards, like NERC and/or ENTSO-E.
• Background in building controls applications for the renewable energy sector.

Work Environment:

• Office Setting, primarily in cubicles, or remote.
• Ability to sit or stand (standing desk provide upon request) at a computer terminal for an extended period.

Physical Demands:

• While performing the duties of this job, the employee is regularly required to communicate (talk/sign/type/write) and operate a computer, telephone (or alternative), keyboard (or typing device), etc.
• Specific vision abilities required by this job include close vision requirements due to computer work.
• Ability to uphold the stress of traveling.

This is a salaried exempt position, M-F, with additional weekend work as required.

Job Location:

Travel: 10%

This position is based in Broomfield, CO, or remote.

What We Offer: 

At Stem, you will work in a growing, innovative, mission-driven company with talented colleagues that have a passion for building renewable energy systems. Stem offers competitive compensation as well as a comprehensive set of benefits to support the health and wellness of our employee including:  

• A competitive compensation package, including eligibility for a bonus or commission based on the role.

• Full health benefits on the first day of employment (several medical plan options-HDHP and PPO, dental plans, FSA/HSA-with employer contribution, employer paid vision/LTD/STD/Life, variety of voluntary coverage)

• 401k (pre- or post-tax) on first day of employment

• 12 paid calendar holidays per year

• Flexible time-off

Learn More

To learn more about Stem, visit our stem.com where you’ll find information about our solutions, technology, partners, case studies, resources, latest news and more. Here are some relevant links: