UX/UI Specialist

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 UX/UI Designer is responsible for the design, prototyping, and front-end development of SCADA products and automation interfaces that ensure a seamless and intuitive experience for operators and engineers managing energy storage systems. This role bridges aesthetic design, user research, and technical front-end implementation, working to transform complex system data and stakeholder feedback into high-performance, responsive, and scalable visual solutions. In US: Hybrid 3 days in office (Houston, TX) In Mexico: Remote Key Responsibilities - Design and maintain SCADA product interfaces and new features based on evolving user needs and technical feedback. Develop static front-end components using specialized industrial software, requiring strong proficiency in HTML, CSS, and modern layout techniques like Flexbox and Grid. - Create, manage, and optimize vector graphics and SVGs for high-performance use within the SCADA environment. - Utilize Adobe Illustrator and Figma to maintain and expand a comprehensive internal Design System, including styles, iconography, typography, and color palettes. - Collaborate with the engineering team to solve logic problems and technical challenges when making product interfaces dynamic and data-driven. - Design for a diverse range of environments, ensuring products are fully responsive and optimized for both Light and Dark modes. - Optimize interfaces for touch-screen HMI devices, ensuring industrial-grade usability and ergonomics in the field. Maintain consistency and an excellent eye for detail across all screens and product modules to ensure a unified user experience. - Design and implement intuitive workflows for complex tasks, such as device settings editing and system configuration. - Facilitate regular feedback sessions with both English and Spanish-speaking users to gather qualitative insights and validate design directions. - Refactor and optimize front-end code to improve system performance, maintainability, and long-term scalability. - Proactively identify future design trends and technical improvements to ensure the product remains at the forefront of the energy storage market. Requirements Bachelor's degree in Multimedia Design, Graphic Design, Interaction Design, UX/UI Design, or a related field, or equivalent experience. Strong proficiency in HTML and CSS, with expertise in modern layout techniques (Flexbox, Grid). Advanced skills in Adobe Illustrator and Figma for vector graphics, design systems, and prototyping. Experience creating and optimizing SVGs for web and industrial applications. Proven experience designing user interfaces for industrial, SCADA, or complex data-driven systems. Strong understanding of responsive design principles and multi-device optimization. Experience designing for both Light and Dark mode environments. Knowledge of touch-screen HMI design principles and industrial usability standards. Ability to collaborate with engineering teams to implement dynamic, data-driven interfaces. Experience conducting user research and feedback sessions with diverse user groups. Excellent attention to detail and commitment to visual consistency across products. Strong problem-solving skills and ability to balance aesthetic design with technical constraints. Fluency in English; Spanish language skills are a plus for US candidates. Willingness to travel for user research, commissioning, and stakeholder meetings as needed. 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 [email protected] Benefits vary by role and location and are subject to change.