Energy storage is the most exciting area in energy today. Massive amounts of energy storage are required if renewable energy is to take its rightful place on the electric grid. Invinity provides an alternative to the most common type of battery, lithium-ion because the battery technology that works so well in our pockets doesn’t work as well at the grid scale; it wears out, limits use, and even catches fire. Manufactured as a standardized product in a factory, Invinity’s vanadium flow batteries don’t degrade, won’t catch fire, and can be operated continuously from full charge to full discharge for 25 years. Invinity has 75 megawatt-hours of its modular battery systems in 82 projects across 15 countries - more than any other company in the space. We’ve deployed the largest flow battery systems in the U.S., Canada, Australia, and the UK, and are supported by the UK's National Wealth Fund, some of the world’s leading institutional investors and our projects are backed by major institutions including the U.S. Department of Energy and the UK Government. A compelling product and recent funding put Invinity in a position to grow dramatically as it addresses the global imperative for stationary energy storage. Join us as we help transform renewable energy into a stable and dependable contributor to the transition to net zero. Invinity has operations in the UK, Canada and the U.S. and trades publicly in the UK on AIM and AQSE and in the U.S. on OTCQX. For more information about us visit our webpage. We are looking for a System Controls Engineer with a strong background in PLC and HMI development to join our innovative software team. In this crucial role, you’ll design and develop software that powers the core of our distributed battery control and energy management systems. Reporting to the Manager of System Controls, you will help ensure our energy storage systems remain efficient, reliable, and responsive over their 25-year lifespan. This is an opportunity to shape the future of grid-scale battery technology with real-world impact on renewable energy integration and grid stability. This is a hybrid role with the requirement to be in office 2 days a week or 8 days a month. Role & Responsibilities Design and develop PLC code using structured text and ladder logic Develop and implement algorithms for energy management and battery control Optimise system performance and ensure high reliability and efficiency Promote good software engineering practices through design and code reviews, ensuring maintainable, efficient, and scalable software Maintain software documentation Spot opportunities and propose continuous improvement Qualifications and Skills Qualifications and Skills Bachelor’s or Master’s degree in Computer Science, Electrical Engineering, or a related field Excellent problem-solving skills and attention to detail Experience with field bus protocols such as Modbus and Ethernet base protocol 2 to 5 years of ladder and Structure text programming Comfortable working in an agile development environment and taking initiative in designs Desirable Hands-on experience with Mitsubishi PLCs/HMIs or Wago PFC Experience with other text-based programming languages Participation in prototype projects and hardware-in-the-loop (HIL) testing Familiarity with tools such as Git, Jira, and Confluence